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/******************************************************************************
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    OpenAirInterface
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    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
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   see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
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  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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 *******************************************************************************/
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/*! \file PHY/LTE_TRANSPORT/proto.h
 * \brief Function prototypes for PHY physical/transport channel processing and generation V8.6 2009-03
 * \author R. Knopp, F. Kaltenberger
 * \date 2011
 * \version 0.1
 * \company Eurecom
 * \email: knopp@eurecom.fr
 * \note
 * \warning
 */
#ifndef __LTE_TRANSPORT_PROTO__H__
#define __LTE_TRANSPORT_PROTO__H__
#include "PHY/defs.h"
#include <math.h>

// Functions below implement 36-211 and 36-212

/** @addtogroup _PHY_TRANSPORT_
 * @{
 */

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/** \fn free_eNB_dlsch(LTE_eNB_DLSCH_t *dlsch,unsigned char N_RB_DL)
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    \brief This function frees memory allocated for a particular DLSCH at eNB
    @param dlsch Pointer to DLSCH to be removed
*/
void free_eNB_dlsch(LTE_eNB_DLSCH_t *dlsch);

void clean_eNb_dlsch(LTE_eNB_DLSCH_t *dlsch, uint8_t abstraction_flag);

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/** \fn new_eNB_dlsch(uint8_t Kmimo,uint8_t Mdlharq,uint32_t Nsoft,uint8_t abstraction_flag, LTE_DL_FRAME_PARMS* frame_parms)
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    \brief This function allocates structures for a particular DLSCH at eNB
    @returns Pointer to DLSCH to be removed
    @param Kmimo Kmimo factor from 36-212/36-213
    @param Mdlharq Maximum number of HARQ rounds (36-212/36-213)
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    @param Nsoft Soft-LLR buffer size from UE-Category
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    @params N_RB_DL total number of resource blocks (determine the operating BW)
    @param abstraction_flag Flag to indicate abstracted interface
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    @param frame_parms Pointer to frame descriptor structure
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*/
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LTE_eNB_DLSCH_t *new_eNB_dlsch(uint8_t Kmimo,uint8_t Mdlharq,uint32_t Nsoft,uint8_t N_RB_DL, uint8_t abstraction_flag, LTE_DL_FRAME_PARMS* frame_parms);
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/** \fn free_ue_dlsch(LTE_UE_DLSCH_t *dlsch)
    \brief This function frees memory allocated for a particular DLSCH at UE
    @param dlsch Pointer to DLSCH to be removed
*/
void free_ue_dlsch(LTE_UE_DLSCH_t *dlsch);

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/** \fn new_ue_dlsch(uint8_t Kmimo,uint8_t Mdlharq,uint32_t Nsoft,uint8_t abstraction_flag)
    \brief This function allocates structures for a particular DLSCH at eNB
    @returns Pointer to DLSCH to be removed
    @param Kmimo Kmimo factor from 36-212/36-213
    @param Mdlharq Maximum number of HARQ rounds (36-212/36-213)
    @param Nsoft Soft-LLR buffer size from UE-Category
    @params N_RB_DL total number of resource blocks (determine the operating BW)
    @param abstraction_flag Flag to indicate abstracted interface
*/
LTE_UE_DLSCH_t *new_ue_dlsch(uint8_t Kmimo,uint8_t Mdlharq,uint32_t Nsoft,uint8_t max_turbo_iterations,uint8_t N_RB_DL, uint8_t abstraction_flag);
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void clean_eNb_ulsch(LTE_eNB_ULSCH_t *ulsch, uint8_t abstraction_flag);

void free_ue_ulsch(LTE_UE_ULSCH_t *ulsch);

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LTE_eNB_ULSCH_t *new_eNB_ulsch(uint8_t Mdlharq,uint8_t max_turbo_iterations,uint8_t N_RB_UL, uint8_t abstraction_flag);
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LTE_UE_ULSCH_t *new_ue_ulsch(uint8_t Mdlharq, unsigned char N_RB_UL, uint8_t abstraction_flag);

/** \fn dlsch_encoding(uint8_t *input_buffer,
    LTE_DL_FRAME_PARMS *frame_parms,
    uint8_t num_pdcch_symbols,
    LTE_eNB_DLSCH_t *dlsch,
    int frame,
    uint8_t subframe)
    \brief This function performs a subset of the bit-coding functions for LTE as described in 36-212, Release 8.Support is limited to turbo-coded channels (DLSCH/ULSCH). The implemented functions are:
    - CRC computation and addition
    - Code block segmentation and sub-block CRC addition
    - Channel coding (Turbo coding)
    - Rate matching (sub-block interleaving, bit collection, selection and transmission
    - Code block concatenation
    @param input_buffer Pointer to input buffer for sub-frame
    @param frame_parms Pointer to frame descriptor structure
    @param num_pdcch_symbols Number of PDCCH symbols in this subframe
    @param dlsch Pointer to dlsch to be encoded
    @param frame Frame number
    @param subframe Subframe number
    @param rm_stats Time statistics for rate-matching
    @param te_stats Time statistics for turbo-encoding
    @param i_stats Time statistics for interleaving
    @returns status
*/
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int32_t dlsch_encoding(uint8_t *a,
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                       LTE_DL_FRAME_PARMS *frame_parms,
                       uint8_t num_pdcch_symbols,
                       LTE_eNB_DLSCH_t *dlsch,
                       int frame,
                       uint8_t subframe,
                       time_stats_t *rm_stats,
                       time_stats_t *te_stats,
                       time_stats_t *i_stats);
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void dlsch_encoding_emul(PHY_VARS_eNB *phy_vars_eNB,
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                         uint8_t *DLSCH_pdu,
                         LTE_eNB_DLSCH_t *dlsch);
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// Functions below implement 36-211

/** \fn allocate_REs_in_RB(mod_sym_t **txdataF,
    uint32_t *jj,
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    uint32_t *jj2,
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    uint16_t re_offset,
    uint32_t symbol_offset,
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    LTE_DL_eNB_HARQ_t *dlsch0_harq,
    LTE_DL_eNB_HARQ_t *dlsch1_harq,
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    uint8_t pilots,
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    int16_t amp,
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    int16_t *qam_table_s,
    uint32_t *re_allocated,
    uint8_t skip_dc,
    uint8_t skip_half,
    uint8_t use2ndpilots,
    LTE_DL_FRAME_PARMS *frame_parms);

    \brief Fills RB with data
    \param txdataF pointer to output data (frequency domain signal)
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    \param jj index to output (from CW 1)
    \param jj index to output (from CW 2)
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    \param re_offset index of the first RE of the RB
    \param symbol_offset index to the OFDM symbol
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    \param dlsch0_harq Pointer to Transport block 0 HARQ structure
    \param dlsch0_harq Pointer to Transport block 1 HARQ structure
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    \param pilots =1 if symbol_offset is an OFDM symbol that contains pilots, 0 otherwise
    \param amp Amplitude for symbols
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    \param qam_table_s0 pointer to scaled QAM table for Transport Block 0 (by rho_a or rho_b)
    \param qam_table_s1 pointer to scaled QAM table for Transport Block 1 (by rho_a or rho_b)
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    \param re_allocated pointer to allocation counter
    \param skip_dc offset for positive RBs
    \param skip_half indicate that first or second half of RB must be skipped for PBCH/PSS/SSS
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    \param ue_spec_rs UE specific RS indicator 
    \param nb_antennas_tx_phy Physical antenna elements which can be different with antenna port number, especially in beamforming case
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    \param use2ndpilots Set to use the pilots from antenna port 1 for PDSCH
    \param frame_parms Frame parameter descriptor
*/

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int32_t allocate_REs_in_RB(PHY_VARS_eNB* phy_vars_eNB,
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                           mod_sym_t **txdataF,
                           uint32_t *jj,
                           uint32_t *jj2,
                           uint16_t re_offset,
                           uint32_t symbol_offset,
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                           LTE_eNB_DLSCH_t *dlsch0,
                           LTE_eNB_DLSCH_t *dlsch1,
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                           uint8_t pilots,
                           int16_t amp,
                           uint8_t precoder_index,
                           int16_t *qam_table_s0,
                           int16_t *qam_table_s1,
                           uint32_t *re_allocated,
                           uint8_t skip_dc,
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                           uint8_t skip_half,
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                           uint8_t lprime,
		           uint8_t mprime,
		           uint8_t Ns);
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/** \fn int32_t dlsch_modulation(mod_sym_t **txdataF,
    int16_t amp,
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    uint32_t sub_frame_offset,
    LTE_DL_FRAME_PARMS *frame_parms,
    uint8_t num_pdcch_symbols,
    LTE_eNB_DLSCH_t *dlsch);

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    \brief This function is the top-level routine for generation of the sub-frame signal (frequency-domain) for DLSCH.
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    @param txdataF Table of pointers for frequency-domain TX signals
    @param amp Amplitude of signal
    @param sub_frame_offset Offset of this subframe in units of subframes (usually 0)
    @param frame_parms Pointer to frame descriptor
    @param num_pdcch_symbols Number of PDCCH symbols in this subframe
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    @param dlsch0 Pointer to Transport Block 0 DLSCH descriptor for this allocation
    @param dlsch1 Pointer to Transport Block 0 DLSCH descriptor for this allocation
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*/
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int32_t dlsch_modulation(PHY_VARS_eNB* phy_vars_eNB,
                         mod_sym_t **txdataF,
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                         int16_t amp,
                         uint32_t sub_frame_offset,
                         uint8_t num_pdcch_symbols,
                         LTE_eNB_DLSCH_t *dlsch0,
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                         LTE_eNB_DLSCH_t *dlsch1);
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/*
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  \brief This function is the top-level routine for generation of the sub-frame signal (frequency-domain) for MCH.
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  @param txdataF Table of pointers for frequency-domain TX signals
  @param amp Amplitude of signal
  @param subframe_offset Offset of this subframe in units of subframes (usually 0)
  @param frame_parms Pointer to frame descriptor
  @param dlsch Pointer to DLSCH descriptor for this allocation
*/
int mch_modulation(mod_sym_t **txdataF,
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                   int16_t amp,
                   uint32_t subframe_offset,
                   LTE_DL_FRAME_PARMS *frame_parms,
                   LTE_eNB_DLSCH_t *dlsch);
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/** \brief Top-level generation function for eNB TX of MBSFN
    @param phy_vars_eNB Pointer to eNB variables
    @param subframe Subframe for PMCH
    @param a Pointer to transport block
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    @param abstraction_flag
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*/
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void generate_mch(PHY_VARS_eNB *phy_vars_eNB,int subframe,uint8_t *a,int abstraction_flag);
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/** \brief This function generates the frequency-domain pilots (cell-specific downlink reference signals)
    @param phy_vars_eNB Pointer to eNB variables
    @param mcs MCS for MBSFN
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    @param ndi new data indicator
    @param rdvix
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    @param abstraction_flag
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*/
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void fill_eNB_dlsch_MCH(PHY_VARS_eNB *phy_vars_eNB,int mcs,int ndi,int rvidx,int abstraction_flag);
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/** \brief This function generates the frequency-domain pilots (cell-specific downlink reference signals)
    @param phy_vars_ue Pointer to UE variables
    @param mcs MCS for MBSFN
    @param eNB_id index of eNB in ue variables
*/
void fill_UE_dlsch_MCH(PHY_VARS_UE *phy_vars_ue,int mcs,int ndi,int rvidx,int eNB_id);

/** \brief Receiver processing for MBSFN, symbols can be done separately for time/CPU-scheduling purposes
    @param phy_vars_ue Pointer to UE variables
    @param eNB_id index of eNB in ue variables
    @param subframe Subframe index of PMCH
    @param symbol Symbol index on which to act
*/
int rx_pmch(PHY_VARS_UE *phy_vars_ue,
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            unsigned char eNB_id,
            uint8_t subframe,
            unsigned char symbol);
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/** \brief Dump OCTAVE/MATLAB files for PMCH debugging
    @param phy_vars_ue Pointer to UE variables
    @param eNB_id index of eNB in ue variables
    @param coded_bits_per_codeword G from 36.211
    @param subframe Index of subframe
    @returns 0 on success
*/
void dump_mch(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint16_t coded_bits_per_codeword,int subframe);


/** \brief This function generates the frequency-domain pilots (cell-specific downlink reference signals)
    for N subframes.
    @param phy_vars_eNB Pointer to eNB variables
    @param txdataF Table of pointers for frequency-domain TX signals
    @param amp Amplitude of signal
    @param N Number of sub-frames to generate
*/
void generate_pilots(PHY_VARS_eNB *phy_vars_eNB,
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                     mod_sym_t **txdataF,
                     int16_t amp,
                     uint16_t N);
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/**
   \brief This function generates the frequency-domain pilots (cell-specific downlink reference signals) for one slot only
   @param phy_vars_eNB Pointer to eNB variables
   @param txdataF Table of pointers for frequency-domain TX signals
   @param amp Amplitude of signal
   @param slot index (0..19)
   @param first_pilot_only (0 no)
*/
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int32_t generate_pilots_slot(PHY_VARS_eNB *phy_vars_eNB,
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                             mod_sym_t **txdataF,
                             int16_t amp,
                             uint16_t slot,
                             int first_pilot_only);

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int32_t generate_mbsfn_pilot(PHY_VARS_eNB *phy_vars_eNB,
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                             mod_sym_t **txdataF,
                             int16_t amp,
                             uint16_t subframe);
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void generate_ue_spec_pilots(PHY_VARS_eNB *phy_vars_eNB,
                             uint8_t UE_id,
                             mod_sym_t **txdataF,
                             int16_t amp,
                             uint16_t Ntti,
		             uint8_t beamforming_mode);

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int32_t generate_pss(mod_sym_t **txdataF,
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                     int16_t amp,
                     LTE_DL_FRAME_PARMS *frame_parms,
                     uint16_t l,
                     uint16_t Ns);
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int32_t generate_pss_emul(PHY_VARS_eNB *phy_vars_eNB,uint8_t sect_id);
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int32_t generate_sss(mod_sym_t **txdataF,
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                     short amp,
                     LTE_DL_FRAME_PARMS *frame_parms,
                     unsigned short symbol,
                     unsigned short slot_offset);
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int32_t generate_pbch(LTE_eNB_PBCH *eNB_pbch,
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                      mod_sym_t **txdataF,
                      int32_t amp,
                      LTE_DL_FRAME_PARMS *frame_parms,
                      uint8_t *pbch_pdu,
                      uint8_t frame_mod4);
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int32_t generate_pbch_emul(PHY_VARS_eNB *phy_vars_eNB,uint8_t *pbch_pdu);
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/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream QPSK/QPSK reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
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void qpsk_qpsk(int16_t *stream0_in,
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               int16_t *stream1_in,
               int16_t *stream0_out,
               int16_t *rho01,
               int32_t length);
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/** \brief This function perform LLR computation for dual-stream (QPSK/QPSK) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr128p pointer to pointer to symbol in dlsch_llr*/
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int32_t dlsch_qpsk_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                            int32_t **rxdataF_comp,
                            int32_t **rxdataF_comp_i,
                            int32_t **rho_i,
                            int16_t *dlsch_llr,
                            uint8_t symbol,
                            uint8_t first_symbol_flag,
                            uint16_t nb_rb,
                            uint16_t pbch_pss_sss_adj,
                            int16_t **llr128p);
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/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream QPSK/16QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
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void qpsk_qam16(int16_t *stream0_in,
                int16_t *stream1_in,
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                short *ch_mag_i,
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                int16_t *stream0_out,
                int16_t *rho01,
                int32_t length);
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/** \brief This function perform LLR computation for dual-stream (QPSK/16QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr128p pointer to pointer to symbol in dlsch_llr*/
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int32_t dlsch_qpsk_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                             int32_t **rxdataF_comp,
                             int32_t **rxdataF_comp_i,
                             int **dl_ch_mag_i, //|h_1|^2*(2/sqrt{10})
                             int32_t **rho_i,
                             int16_t *dlsch_llr,
                             uint8_t symbol,
                             uint8_t first_symbol_flag,
                             uint16_t nb_rb,
                             uint16_t pbch_pss_sss_adj,
                             int16_t **llr128p);
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/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream QPSK/64QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
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void qpsk_qam64(int16_t *stream0_in,
                int16_t *stream1_in,
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                short *ch_mag_i,
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                int16_t *stream0_out,
                int16_t *rho01,
                int32_t length);
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/** \brief This function perform LLR computation for dual-stream (QPSK/64QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr128p pointer to pointer to symbol in dlsch_llr*/
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int32_t dlsch_qpsk_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                             int32_t **rxdataF_comp,
                             int32_t **rxdataF_comp_i,
                             int **dl_ch_mag_i, //|h_1|^2*(2/sqrt{10})
                             int32_t **rho_i,
                             int16_t *dlsch_llr,
                             uint8_t symbol,
                             uint8_t first_symbol_flag,
                             uint16_t nb_rb,
                             uint16_t pbch_pss_sss_adj,
                             int16_t **llr128p);
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/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream 16QAM/QPSK reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
void qam16_qpsk(short *stream0_in,
                short *stream1_in,
                short *ch_mag,
                short *stream0_out,
                short *rho01,
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                int length);
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/** \brief This function perform LLR computation for dual-stream (16QAM/QPSK) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr16p pointer to pointer to symbol in dlsch_llr*/
int dlsch_16qam_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
                         int **rxdataF_comp,
                         int **rxdataF_comp_i,
                         int **dl_ch_mag,   //|h_0|^2*(2/sqrt{10})
                         int **rho_i,
                         short *dlsch_llr,
                         unsigned char symbol,
                         unsigned char first_symbol_flag,
                         unsigned short nb_rb,
                         uint16_t pbch_pss_sss_adjust,
                         short **llr16p);

/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream 16QAM/16QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
void qam16_qam16(short *stream0_in,
                 short *stream1_in,
                 short *ch_mag,
                 short *ch_mag_i,
                 short *stream0_out,
                 short *rho01,
                 int length);

/** \brief This function perform LLR computation for dual-stream (16QAM/16QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr16p pointer to pointer to symbol in dlsch_llr*/
int dlsch_16qam_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                          int **rxdataF_comp,
                          int **rxdataF_comp_i,
                          int **dl_ch_mag,   //|h_0|^2*(2/sqrt{10})
                          int **dl_ch_mag_i, //|h_1|^2*(2/sqrt{10})
                          int **rho_i,
                          short *dlsch_llr,
                          unsigned char symbol,
                          unsigned char first_symbol_flag,
                          unsigned short nb_rb,
                          uint16_t pbch_pss_sss_adjust,
                          short **llr16p);

/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream 16QAM/64QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
void qam16_qam64(short *stream0_in,
                 short *stream1_in,
                 short *ch_mag,
                 short *ch_mag_i,
                 short *stream0_out,
                 short *rho01,
                 int length);

/** \brief This function perform LLR computation for dual-stream (16QAM/64QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr16p pointer to pointer to symbol in dlsch_llr*/
int dlsch_16qam_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                          int **rxdataF_comp,
                          int **rxdataF_comp_i,
                          int **dl_ch_mag,   //|h_0|^2*(2/sqrt{10})
                          int **dl_ch_mag_i, //|h_1|^2*(2/sqrt{10})
                          int **rho_i,
                          short *dlsch_llr,
                          unsigned char symbol,
                          unsigned char first_symbol_flag,
                          unsigned short nb_rb,
                          uint16_t pbch_pss_sss_adjust,
                          short **llr16p);

/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream 64QAM/64QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
void qam64_qpsk(short *stream0_in,
                short *stream1_in,
                short *ch_mag,
                short *stream0_out,
                short *rho01,
                int length);

/** \brief This function perform LLR computation for dual-stream (64QAM/64QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr16p pointer to pointer to symbol in dlsch_llr*/
int dlsch_64qam_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
                         int **rxdataF_comp,
                         int **rxdataF_comp_i,
                         int **dl_ch_mag,
                         int **rho_i,
                         short *dlsch_llr,
                         unsigned char symbol,
                         unsigned char first_symbol_flag,
                         unsigned short nb_rb,
                         uint16_t pbch_pss_sss_adjust,
                         short **llr16p);

/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream 64QAM/16QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
void qam64_qam16(short *stream0_in,
                 short *stream1_in,
                 short *ch_mag,
                 short *ch_mag_i,
                 short *stream0_out,
                 short *rho01,
                 int length);

/** \brief This function perform LLR computation for dual-stream (64QAM/16QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr16p pointer to pointer to symbol in dlsch_llr*/
int dlsch_64qam_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                          int **rxdataF_comp,
                          int **rxdataF_comp_i,
                          int **dl_ch_mag,
                          int **dl_ch_mag_i,
                          int **rho_i,
                          short *dlsch_llr,
                          unsigned char symbol,
                          unsigned char first_symbol_flag,
                          unsigned short nb_rb,
                          uint16_t pbch_pss_sss_adjust,
                          short **llr16p);

/** \brief This function computes the LLRs for ML (max-logsum approximation) dual-stream 64QAM/64QAM reception.
    @param stream0_in Input from channel compensated (MR combined) stream 0
    @param stream1_in Input from channel compensated (MR combined) stream 1
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param stream0_out Output from LLR unit for stream0
    @param rho01 Cross-correlation between channels (MR combined)
    @param length in complex channel outputs*/
void qam64_qam64(short *stream0_in,
                 short *stream1_in,
                 short *ch_mag,
                 short *ch_mag_i,
                 short *stream0_out,
                 short *rho01,
                 int length);

/** \brief This function perform LLR computation for dual-stream (64QAM/64QAM) transmission.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param ch_mag   Input from scaled channel magnitude square of h0'*g0
    @param ch_mag_i Input from scaled channel magnitude square of h0'*g1
    @param rho_i Correlation between channel of signal and inteference
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
    @param first_symbol_flag flag to indicate this is the first symbol of the dlsch
    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr16p pointer to pointer to symbol in dlsch_llr*/
int dlsch_64qam_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                          int **rxdataF_comp,
                          int **rxdataF_comp_i,
                          int **dl_ch_mag,
                          int **dl_ch_mag_i,
                          int **rho_i,
                          short *dlsch_llr,
                          unsigned char symbol,
                          unsigned char first_symbol_flag,
                          unsigned short nb_rb,
                          uint16_t pbch_pss_sss_adjust,
                          short **llr16p);


/** \brief This function generates log-likelihood ratios (decoder input) for single-stream QPSK received waveforms.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param dlsch_llr llr output
    @param symbol OFDM symbol index in sub-frame
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    @param first_symbol_flag
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    @param nb_rb number of RBs for this allocation
    @param pbch_pss_sss_adj Number of channel bits taken by PBCH/PSS/SSS
    @param llr128p pointer to pointer to symbol in dlsch_llr
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    @param beamforming_mode beamforming mode
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*/
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int32_t dlsch_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                       int32_t **rxdataF_comp,
                       int16_t *dlsch_llr,
                       uint8_t symbol,
                       uint8_t first_symbol_flag,
                       uint16_t nb_rb,
                       uint16_t pbch_pss_sss_adj,
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                       int16_t **llr128p,
                       uint8_t beamforming_mode);
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/**
   \brief This function generates log-likelihood ratios (decoder input) for single-stream 16QAM received waveforms
   @param frame_parms Frame descriptor structure
   @param rxdataF_comp Compensated channel output
   @param dlsch_llr llr output
   @param dl_ch_mag Squared-magnitude of channel in each resource element position corresponding to allocation and weighted for mid-point in 16QAM constellation
   @param symbol OFDM symbol index in sub-frame
   @param first_symbol_flag
   @param nb_rb number of RBs for this allocation
   @param pbch_pss_sss_adjust  Adjustment factor in RE for PBCH/PSS/SSS allocations
   @param llr128p pointer to pointer to symbol in dlsch_llr
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   @param beamforming_mode beamforming mode
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*/

void dlsch_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                     int32_t **rxdataF_comp,
                     int16_t *dlsch_llr,
                     int32_t **dl_ch_mag,
                     uint8_t symbol,
                     uint8_t first_symbol_flag,
                     uint16_t nb_rb,
                     uint16_t pbch_pss_sss_adjust,
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                     int16_t **llr128p,
                     uint8_t beamforming_mode);
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/**
   \brief This function generates log-likelihood ratios (decoder input) for single-stream 16QAM received waveforms
   @param frame_parms Frame descriptor structure
   @param rxdataF_comp Compensated channel output
   @param dlsch_llr llr output
   @param dl_ch_mag Squared-magnitude of channel in each resource element position corresponding to allocation, weighted by first mid-point of 64-QAM constellation
   @param dl_ch_magb Squared-magnitude of channel in each resource element position corresponding to allocation, weighted by second mid-point of 64-QAM constellation
   @param symbol OFDM symbol index in sub-frame
   @param first_symbol_flag
   @param nb_rb number of RBs for this allocation
   @param pbch_pss_sss_adjust PBCH/PSS/SSS RE adjustment (in REs)
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   @param beamforming_mode beamforming mode
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*/
void dlsch_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                     int32_t **rxdataF_comp,
                     int16_t *dlsch_llr,
                     int32_t **dl_ch_mag,
                     int32_t **dl_ch_magb,
                     uint8_t symbol,
                     uint8_t first_symbol_flag,
                     uint16_t nb_rb,
                     uint16_t pbch_pss_sss_adjust,
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                     int16_t **llr_save,
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                     uint8_t beamforming_mode);
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/** \fn dlsch_siso(LTE_DL_FRAME_PARMS *frame_parms,
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    int32_t **rxdataF_comp,
    int32_t **rxdataF_comp_i,
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    uint8_t l,
    uint16_t nb_rb)
    \brief This function does the first stage of llr computation for SISO, by just extracting the pilots, PBCH and primary/secondary synchronization sequences.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param l symbol in sub-frame
    @param nb_rb Number of RBs in this allocation
*/

void dlsch_siso(LTE_DL_FRAME_PARMS *frame_parms,
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                int32_t **rxdataF_comp,
                int32_t **rxdataF_comp_i,
                uint8_t l,
                uint16_t nb_rb);
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/** \fn dlsch_alamouti(LTE_DL_FRAME_PARMS *frame_parms,
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    int32_t **rxdataF_comp,
    int32_t **dl_ch_mag,
    int32_t **dl_ch_magb,
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    uint8_t symbol,
    uint16_t nb_rb)
    \brief This function does Alamouti combining on RX and prepares LLR inputs by skipping pilots, PBCH and primary/secondary synchronization signals.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param dl_ch_mag First squared-magnitude of channel (16QAM and 64QAM) for LLR computation.  Alamouti combining should be performed on this as well. Result is stored in first antenna position
    @param dl_ch_magb Second squared-magnitude of channel (64QAM only) for LLR computation.  Alamouti combining should be performed on this as well. Result is stored in first antenna position
    @param symbol Symbol in sub-frame
    @param nb_rb Number of RBs in this allocation
*/
void dlsch_alamouti(LTE_DL_FRAME_PARMS *frame_parms,
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                    int32_t **rxdataF_comp,
                    int32_t **dl_ch_mag,
                    int32_t **dl_ch_magb,
                    uint8_t symbol,
                    uint16_t nb_rb);
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/** \fn dlsch_antcyc(LTE_DL_FRAME_PARMS *frame_parms,
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    int32_t **rxdataF_comp,
    int32_t **dl_ch_mag,
    int32_t **dl_ch_magb,
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    uint8_t symbol,
    uint16_t nb_rb)
    \brief This function does antenna selection (based on antenna cycling pattern) on RX and prepares LLR inputs by skipping pilots, PBCH and primary/secondary synchronization signals.  Note that this is not LTE, it is just included for comparison purposes.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param dl_ch_mag First squared-magnitude of channel (16QAM and 64QAM) for LLR computation.  Alamouti combining should be performed on this as well. Result is stored in first antenna position
    @param dl_ch_magb Second squared-magnitude of channel (64QAM only) for LLR computation.  Alamouti combining should be performed on this as well. Result is stored in first antenna position
    @param symbol Symbol in sub-frame
    @param nb_rb Number of RBs in this allocation
*/
void dlsch_antcyc(LTE_DL_FRAME_PARMS *frame_parms,
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                  int32_t **rxdataF_comp,
                  int32_t **dl_ch_mag,
                  int32_t **dl_ch_magb,
                  uint8_t symbol,
                  uint16_t nb_rb);
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/** \fn dlsch_detection_mrc(LTE_DL_FRAME_PARMS *frame_parms,
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    int32_t **rxdataF_comp,
    int32_t **rxdataF_comp_i,
    int32_t **rho,
    int32_t **rho_i,
    int32_t **dl_ch_mag,
    int32_t **dl_ch_magb,
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    uint8_t symbol,
    uint16_t nb_rb,
    uint8_t dual_stream_UE)

    \brief This function does maximal-ratio combining for dual-antenna receivers.
    @param frame_parms Frame descriptor structure
    @param rxdataF_comp Compensated channel output
    @param rxdataF_comp_i Compensated channel output for interference
    @param rho Cross correlation between spatial channels
    @param rho_i Cross correlation between signal and inteference channels
    @param dl_ch_mag First squared-magnitude of channel (16QAM and 64QAM) for LLR computation.  Alamouti combining should be performed on this as well. Result is stored in first antenna position
    @param dl_ch_magb Second squared-magnitude of channel (64QAM only) for LLR computation.  Alamouti combining should be performed on this as well. Result is stored in first antenna position
    @param symbol Symbol in sub-frame
    @param nb_rb Number of RBs in this allocation
    @param dual_stream_UE Flag to indicate dual-stream detection
*/
void dlsch_detection_mrc(LTE_DL_FRAME_PARMS *frame_parms,
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                         int32_t **rxdataF_comp,
                         int32_t **rxdataF_comp_i,
                         int32_t **rho,
                         int32_t **rho_i,
                         int32_t **dl_ch_mag,
                         int32_t **dl_ch_magb,
                         int32_t **dl_ch_mag_i,
                         int32_t **dl_ch_magb_i,
                         uint8_t symbol,
                         uint16_t nb_rb,
                         uint8_t dual_stream_UE);
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/** \fn dlsch_extract_rbs_single(int32_t **rxdataF,
    int32_t **dl_ch_estimates,
    int32_t **rxdataF_ext,
    int32_t **dl_ch_estimates_ext,
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    uint16_t pmi,
    uint8_t *pmi_ext,
    uint32_t *rb_alloc,
    uint8_t symbol,
    uint8_t subframe,
    LTE_DL_FRAME_PARMS *frame_parms)
    \brief This function extracts the received resource blocks, both channel estimates and data symbols,
    for the current allocation and for single antenna eNB transmission.
    @param rxdataF Raw FFT output of received signal
    @param dl_ch_estimates Channel estimates of current slot
    @param rxdataF_ext FFT output for RBs in this allocation
    @param dl_ch_estimates_ext Channel estimates for RBs in this allocation
    @param pmi subband Precoding matrix indicator
    @param pmi_ext Extracted PMI for chosen RBs
    @param rb_alloc RB allocation vector
    @param symbol Symbol to extract
    @param subframe Subframe number
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    @param vrb_type Flag to indicate distributed VRB type
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    @param high_speed_flag
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    @param frame_parms Pointer to frame descriptor
*/
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uint16_t dlsch_extract_rbs_single(int32_t **rxdataF,
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                                  int32_t **dl_ch_estimates,
                                  int32_t **rxdataF_ext,
                                  int32_t **dl_ch_estimates_ext,
                                  uint16_t pmi,
                                  uint8_t *pmi_ext,
                                  uint32_t *rb_alloc,
                                  uint8_t symbol,
                                  uint8_t subframe,
                                  uint32_t high_speed_flag,
                                  LTE_DL_FRAME_PARMS *frame_parms);
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/** \fn dlsch_extract_rbs_dual(int32_t **rxdataF,
    int32_t **dl_ch_estimates,
    int32_t **rxdataF_ext,
    int32_t **dl_ch_estimates_ext,
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    uint16_t pmi,
    uint8_t *pmi_ext,
    uint32_t *rb_alloc,
    uint8_t symbol,
    LTE_DL_FRAME_PARMS *frame_parms)
    \brief This function extracts the received resource blocks, both channel estimates and data symbols,
    for the current allocation and for dual antenna eNB transmission.
    @param rxdataF Raw FFT output of received signal
    @param dl_ch_estimates Channel estimates of current slot
    @param rxdataF_ext FFT output for RBs in this allocation
    @param dl_ch_estimates_ext Channel estimates for RBs in this allocation
    @param pmi subband Precoding matrix indicator
    @param pmi_ext Extracted PMI for chosen RBs
    @param rb_alloc RB allocation vector
    @param symbol Symbol to extract
    @param subframe Subframe index
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    @param high_speed_flag
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    @param frame_parms Pointer to frame descriptor
*/
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uint16_t dlsch_extract_rbs_dual(int32_t **rxdataF,
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                                int32_t **dl_ch_estimates,
                                int32_t **rxdataF_ext,
                                int32_t **dl_ch_estimates_ext,
                                uint16_t pmi,
                                uint8_t *pmi_ext,
                                uint32_t *rb_alloc,
                                uint8_t symbol,
                                uint8_t subframe,
                                uint32_t high_speed_flag,
                                LTE_DL_FRAME_PARMS *frame_parms);
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/** \fn dlsch_extract_rbs_TM7(int32_t **rxdataF,
    int32_t **dl_bf_ch_estimates,
    int32_t **rxdataF_ext,
    int32_t **dl_bf_ch_estimates_ext,
    uint32_t *rb_alloc,
    uint8_t symbol,
    uint8_t subframe,
    uint32_t high_speed_flag,
    LTE_DL_FRAME_PARMS *frame_parms)
    \brief This function extracts the received resource blocks, both channel estimates and data symbols,
    for the current allocation and for single antenna eNB transmission.
    @param rxdataF Raw FFT output of received signal
    @param dl_bf_ch_estimates Beamforming channel estimates of current slot
    @param rxdataF_ext FFT output for RBs in this allocation
    @param dl_bf_ch_estimates_ext Beamforming channel estimates for RBs in this allocation
    @param rb_alloc RB allocation vector
    @param symbol Symbol to extract
    @param subframe Subframe number
    @param high_speed_flag
    @param frame_parms Pointer to frame descriptor
*/
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uint16_t dlsch_extract_rbs_TM7(int32_t **rxdataF,
                               int32_t **dl_bf_ch_estimates,
                               int32_t **rxdataF_ext,
                               int32_t **dl_bf_ch_estimates_ext,
                               uint32_t *rb_alloc,
                               uint8_t symbol,
                               uint8_t subframe,
                               uint32_t high_speed_flag,
                               LTE_DL_FRAME_PARMS *frame_parms);

963 964 965 966 967
/** \brief This function performs channel compensation (matched filtering) on the received RBs for this allocation.  In addition, it computes the squared-magnitude of the channel with weightings for 16QAM/64QAM detection as well as dual-stream detection (cross-correlation)
    @param rxdataF_ext Frequency-domain received signal in RBs to be demodulated
    @param dl_ch_estimates_ext Frequency-domain channel estimates in RBs to be demodulated
    @param dl_ch_mag First Channel magnitudes (16QAM/64QAM)
    @param dl_ch_magb Second weighted Channel magnitudes (64QAM)
968
    @param rxdataF_comp Compensated received waveform
969 970 971 972 973 974 975 976 977
    @param rho Cross-correlation between two spatial channels on each RX antenna
    @param frame_parms Pointer to frame descriptor
    @param symbol Symbol on which to operate
    @param first_symbol_flag set to 1 on first DLSCH symbol
    @param mod_order Modulation order of allocation
    @param nb_rb Number of RBs in allocation
    @param output_shift Rescaling for compensated output (should be energy-normalizing)
    @param phy_measurements Pointer to UE PHY measurements
*/
978
void dlsch_channel_compensation(int32_t **rxdataF_ext,
979 980 981 982 983 984 985 986 987 988 989 990
                                int32_t **dl_ch_estimates_ext,
                                int32_t **dl_ch_mag,
                                int32_t **dl_ch_magb,
                                int32_t **rxdataF_comp,
                                int32_t **rho,
                                LTE_DL_FRAME_PARMS *frame_parms,
                                uint8_t symbol,
                                uint8_t first_symbol_flag,
                                uint8_t mod_order,
                                uint16_t nb_rb,
                                uint8_t output_shift,
                                PHY_MEASUREMENTS *phy_measurements);
991 992 993 994 995 996 997 998 999

void dlsch_dual_stream_correlation(LTE_DL_FRAME_PARMS *frame_parms,
                                   unsigned char symbol,
                                   unsigned short nb_rb,
                                   int **dl_ch_estimates_ext,
                                   int **dl_ch_estimates_ext_i,
                                   int **dl_ch_rho_ext,
                                   unsigned char output_shift);

1000
void dlsch_channel_compensation_TM56(int **rxdataF_ext,
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
                                     int **dl_ch_estimates_ext,
                                     int **dl_ch_mag,
                                     int **dl_ch_magb,
                                     int **rxdataF_comp,
                                     unsigned char *pmi_ext,
                                     LTE_DL_FRAME_PARMS *frame_parms,
                                     PHY_MEASUREMENTS *phy_measurements,
                                     int eNB_id,
                                     unsigned char symbol,
                                     unsigned char mod_order,
                                     unsigned short nb_rb,
                                     unsigned char output_shift,
                                     unsigned char dl_power_off);
1014

1015
void dlsch_channel_compensation_TM3(LTE_DL_FRAME_PARMS *frame_parms,
1016 1017 1018 1019 1020 1021 1022 1023 1024
                                    LTE_UE_PDSCH *lte_ue_pdsch_vars,
                                    PHY_MEASUREMENTS *phy_measurements,
                                    int eNB_id,
                                    unsigned char symbol,
                                    unsigned char mod_order0,
                                    unsigned char mod_order1,
                                    int round,
                                    unsigned short nb_rb,
                                    unsigned char output_shift);
1025 1026


1027 1028 1029 1030 1031 1032 1033
/** \brief This function computes the average channel level over all allocated RBs and antennas (TX/RX) in order to compute output shift for compensated signal
    @param dl_ch_estimates_ext Channel estimates in allocated RBs
    @param frame_parms Pointer to frame descriptor
    @param avg Pointer to average signal strength
    @param pilots_flag Flag to indicate pilots in symbol
    @param nb_rb Number of allocated RBs
*/
1034
void dlsch_channel_level(int32_t **dl_ch_estimates_ext,
1035 1036 1037 1038
                         LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t *avg,
                         uint8_t pilots_flag,
                         uint16_t nb_rb);
1039

1040
void dlsch_channel_level_TM3(int **dl_ch_estimates_ext,
1041 1042 1043 1044
                             LTE_DL_FRAME_PARMS *frame_parms,
                             int *avg,
                             uint8_t symbol,
                             unsigned short nb_rb);
1045 1046

void dlsch_channel_level_TM56(int32_t **dl_ch_estimates_ext,
1047 1048
                              LTE_DL_FRAME_PARMS *frame_parms,
                              unsigned char *pmi_ext,
1049
                              int32_t *avg,
1050 1051 1052
                              uint8_t symbol_mod,
                              uint16_t nb_rb);

1053 1054 1055 1056 1057 1058
void dlsch_channel_level_TM7(int32_t **dl_bf_ch_estimates_ext,
                         LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t *avg,
                         uint8_t pilots_flag,
                         uint16_t nb_rb);

1059
void dlsch_scale_channel(int32_t **dl_ch_estimates_ext,
1060 1061 1062 1063 1064 1065
                         LTE_DL_FRAME_PARMS *frame_parms,
                         LTE_UE_DLSCH_t **dlsch_ue,
                         uint8_t symbol_mod,
                         uint16_t nb_rb);

/** \brief This is the top-level entry point for DLSCH decoding in UE.  It should be replicated on several
1066
    threads (on multi-core machines) corresponding to different HARQ processes. The routine first
1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
    computes the segmentation information, followed by rate dematching and sub-block deinterleaving the of the
    received LLRs computed by dlsch_demodulation for each transport block segment. It then calls the
    turbo-decoding algorithm for each segment and stops after either after unsuccesful decoding of at least
    one segment or correct decoding of all segments.  Only the segment CRCs are check for the moment, the
    overall CRC is ignored.  Finally transport block reassembly is performed.
    @param phy_vars_ue Pointer to ue variables
    @param dlsch_llr Pointer to LLR values computed by dlsch_demodulation
    @param lte_frame_parms Pointer to frame descriptor
    @param dlsch Pointer to DLSCH descriptor
    @param subframe Subframe number
    @param num_pdcch_symbols Number of PDCCH symbols
    @param is_crnti indicates if PDSCH belongs to a CRNTI (necessary for parallelizing decoding threads)
    @param llr8_flag If 1, indicate that the 8-bit turbo decoder should be used
    @returns 0 on success, 1 on unsuccessful decoding
*/
uint32_t dlsch_decoding(PHY_VARS_UE *phy_vars_ue,
1083 1084 1085 1086 1087 1088 1089 1090
                        int16_t *dlsch_llr,
                        LTE_DL_FRAME_PARMS *lte_frame_parms,
                        LTE_UE_DLSCH_t *dlsch,
                        LTE_DL_UE_HARQ_t *harq_process,
                        uint8_t subframe,
                        uint8_t harq_pid,
                        uint8_t is_crnti,
                        uint8_t llr8_flag);
1091 1092

uint32_t dlsch_decoding_emul(PHY_VARS_UE *phy_vars_ue,
1093 1094 1095
                             uint8_t subframe,
                             uint8_t dlsch_id,
                             uint8_t eNB_id);
1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112

/** \brief This function is the top-level entry point to PDSCH demodulation, after frequency-domain transformation and channel estimation.  It performs
    - RB extraction (signal and channel estimates)
    - channel compensation (matched filtering)
    - RE extraction (pilot, PBCH, synch. signals)
    - antenna combining (MRC, Alamouti, cycling)
    - LLR computation
    @param phy_vars_ue Pointer to PHY variables
    @param type Type of PDSCH (SI_PDSCH,RA_PDSCH,PDSCH,PMCH)
    @param eNB_id eNb index (Nid1) 0,1,2
    @param eNB_id_i Interfering eNB index (Nid1) 0,1,2, or 3 in case of MU-MIMO IC receiver
    @param subframe Subframe number
    @param symbol Symbol on which to act (within sub-frame)
    @param first_symbol_flag set to 1 on first DLSCH symbol
    @param dual_stream_UE Flag to indicate dual-stream interference cancellation
    @param i_mod Modulation order of the interfering stream
*/
1113
int32_t rx_pdsch(PHY_VARS_UE *phy_vars_ue,
1114 1115 1116 1117 1118 1119 1120 1121 1122
                 PDSCH_t type,
                 uint8_t eNB_id,
                 uint8_t eNB_id_i,
                 uint8_t subframe,
                 uint8_t symbol,
                 uint8_t first_symbol_flag,
                 uint8_t dual_stream_UE,
                 uint8_t i_mod,
                 uint8_t harq_pid);
1123

1124
int32_t rx_pdcch(LTE_UE_COMMON *lte_ue_common_vars,
1125 1126 1127 1128 1129 1130 1131
                 LTE_UE_PDCCH **lte_ue_pdcch_vars,
                 LTE_DL_FRAME_PARMS *frame_parms,
                 uint8_t subframe,
                 uint8_t eNB_id,
                 MIMO_mode_t mimo_mode,
                 uint32_t high_speed_flag,
                 uint8_t is_secondary_ue);
1132 1133 1134 1135 1136 1137 1138 1139
/*! \brief Performs detection of SSS to find cell ID and other framing parameters (FDD/TDD, normal/extended prefix)
  @param phy_vars_ue Pointer to UE variables
  @param tot_metric Pointer to variable containing maximum metric under framing hypothesis (to be compared to other hypotheses
  @param flip_max Pointer to variable indicating if start of frame is in second have of RX buffer (i.e. PSS/SSS is flipped)
  @param phase_max Pointer to variable (0 ... 6) containing rought phase offset between PSS and SSS (can be used for carrier
  frequency adjustment. 0 means -pi/3, 6 means pi/3.
  @returns 0 on success
*/
1140
int rx_sss(PHY_VARS_UE *phy_vars_ue,int32_t *tot_metric,uint8_t *flip_max,uint8_t *phase_max);
1141 1142 1143 1144 1145

/*! \brief receiver for the PBCH
  \returns number of tx antennas or -1 if error
*/
uint16_t rx_pbch(LTE_UE_COMMON *lte_ue_common_vars,
1146 1147 1148 1149 1150 1151
                 LTE_UE_PBCH *lte_ue_pbch_vars,
                 LTE_DL_FRAME_PARMS *frame_parms,
                 uint8_t eNB_id,
                 MIMO_mode_t mimo_mode,
                 uint32_t high_speed_flag,
                 uint8_t frame_mod4);
1152 1153

uint16_t rx_pbch_emul(PHY_VARS_UE *phy_vars_ue,
1154 1155
                      uint8_t eNB_id,
                      uint8_t pbch_phase);
1156 1157 1158 1159

/*! \brief PBCH scrambling. Applies 36.211 PBCH scrambling procedure.
  \param frame_parms Pointer to frame descriptor
  \param coded_data Output of the coding and rate matching
1160
  \param length Length of the sequence*/
1161
void pbch_scrambling(LTE_DL_FRAME_PARMS *frame_parms,
1162 1163
                     uint8_t* coded_data,
                     uint32_t length);
1164 1165 1166 1167 1168 1169

/*! \brief PBCH unscrambling
  This is similar to pbch_scrabling with the difference that inputs are signed s16s (llr values) and instead of flipping bits we change signs.
  \param frame_parms Pointer to frame descriptor
  \param llr Output of the demodulator
  \param length Length of the sequence
1170
  \param frame_mod4 Frame number modulo 4*/
1171
void pbch_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
1172 1173 1174
                       int8_t* llr,
                       uint32_t length,
                       uint8_t frame_mod4);
1175 1176 1177 1178 1179 1180

/*! \brief DCI Encoding. This routine codes an arbitrary DCI PDU after appending the 8-bit 3GPP CRC.  It then applied sub-block interleaving and rate matching.
  \param a Pointer to DCI PDU (coded in bytes)
  \param A Length of DCI PDU in bits
  \param E Length of DCI PDU in coded bits
  \param e Pointer to sequence
1181
  \param rnti RNTI for CRC scrambling*/
1182
void dci_encoding(uint8_t *a,
1183 1184 1185 1186
                  uint8_t A,
                  uint16_t E,
                  uint8_t *e,
                  uint16_t rnti);
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197

/*! \brief Top-level DCI entry point. This routine codes an set of DCI PDUs and performs PDCCH modulation, interleaving and mapping.
  \param num_ue_spec_dci  Number of UE specific DCI pdus to encode
  \param num_common_dci Number of Common DCI pdus to encode
  \param dci_alloc Allocation vectors for each DCI pdu
  \param n_rnti n_RNTI (see )
  \param amp Amplitude of QPSK symbols
  \param frame_parms Pointer to DL Frame parameter structure
  \param txdataF Pointer to tx signal buffers
  \param sub_frame_offset subframe offset in frame
  @returns Number of PDCCH symbols
1198
*/
1199
uint8_t generate_dci_top(uint8_t num_ue_spec_dci,
1200 1201 1202 1203 1204 1205 1206
                         uint8_t num_common_dci,
                         DCI_ALLOC_t *dci_alloc,
                         uint32_t n_rnti,
                         int16_t amp,
                         LTE_DL_FRAME_PARMS *frame_parms,
                         mod_sym_t **txdataF,
                         uint32_t sub_frame_offset);
1207 1208

uint8_t generate_dci_top_emul(PHY_VARS_eNB *phy_vars_eNB,
1209 1210 1211 1212
                              uint8_t num_ue_spec_dci,
                              uint8_t num_common_dci,
                              DCI_ALLOC_t *dci_alloc,
                              uint8_t subframe);
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224


void generate_64qam_table(void);
void generate_16qam_table(void);

uint16_t extract_crc(uint8_t *dci,uint8_t DCI_LENGTH);

/*! \brief LLR from two streams. This function takes two streams (qpsk modulated) and calculates the LLR, considering one stream as interference.
  \param stream0_in pointer to first stream0
  \param stream1_in pointer to first stream1
  \param stream0_out pointer to output stream
  \param rho01 pointer to correlation matrix
1225
  \param length*/
1226
void qpsk_qpsk_TM3456(short *stream0_in,
1227 1228 1229 1230 1231
                      short *stream1_in,
                      short *stream0_out,
                      short *rho01,
                      int length
                     );
1232 1233 1234 1235 1236 1237 1238 1239

/** \brief Attempt decoding of a particular DCI with given length and format.
    @param DCI_LENGTH length of DCI in bits
    @param DCI_FMT Format of DCI
    @param e e-sequence (soft bits)
    @param decoded_output Output of Viterbi decoder
*/
void dci_decoding(uint8_t DCI_LENGTH,
1240 1241 1242
                  uint8_t DCI_FMT,
                  int8_t *e,
                  uint8_t *decoded_output);
1243 1244 1245 1246 1247

/** \brief Do 36.213 DCI decoding procedure by searching different RNTI options and aggregation levels.  Currently does
    not employ the complexity reducing procedure based on RNTI.
    @param phy_vars_ue UE variables
    @param dci_alloc Pointer to DCI_ALLOC_t array to store results for DLSCH/ULSCH programming
1248
    @param do_common If 1 perform search in common search-space else ue-specific search-space
1249 1250 1251 1252 1253
    @param eNB_id eNB Index on which to act
    @param subframe Index of subframe
    @returns bitmap of occupied CCE positions (i.e. those detected)
*/
uint16_t dci_decoding_procedure(PHY_VARS_UE *phy_vars_ue,
1254 1255 1256 1257
                                DCI_ALLOC_t *dci_alloc,
                                int do_common,
                                int16_t eNB_id,
                                uint8_t subframe);
1258 1259 1260


uint16_t dci_decoding_procedure_emul(LTE_UE_PDCCH **lte_ue_pdcch_vars,
1261 1262 1263 1264 1265
                                     uint8_t num_ue_spec_dci,
                                     uint8_t num_common_dci,
                                     DCI_ALLOC_t *dci_alloc_tx,
                                     DCI_ALLOC_t *dci_alloc_rx,
                                     int16_t eNB_id);
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286

/** \brief Compute Q (modulation order) based on I_MCS PDSCH.  Implements table 7.1.7.1-1 from 36.213.
    @param I_MCS */
uint8_t get_Qm(uint8_t I_MCS);

/** \brief Compute Q (modulation order) based on I_MCS for PUSCH.  Implements table 8.6.1-1 from 36.213.
    @param I_MCS */
uint8_t get_Qm_ul(uint8_t I_MCS);

/** \brief Compute I_TBS (transport-block size) based on I_MCS for PDSCH.  Implements table 7.1.7.1-1 from 36.213.
    @param I_MCS */
uint8_t get_I_TBS(uint8_t I_MCS);

/** \brief Compute I_TBS (transport-block size) based on I_MCS for PUSCH.  Implements table 8.6.1-1 from 36.213.
    @param I_MCS */
unsigned char get_I_TBS_UL(unsigned char I_MCS);

/** \brief Compute Q (modulation order) based on downlink I_MCS. Implements table 7.1.7.1-1 from 36.213.
    @param I_MCS
    @param nb_rb
    @return Transport block size */
1287
uint32_t get_TBS_DL(uint8_t mcs, uint16_t nb_rb);
1288 1289 1290 1291 1292

/** \brief Compute Q (modulation order) based on uplink I_MCS. Implements table 7.1.7.1-1 from 36.213.
    @param I_MCS
    @param nb_rb
    @return Transport block size */
1293
uint32_t get_TBS_UL(uint8_t mcs, uint16_t nb_rb);
1294 1295

/* \brief Return bit-map of resource allocation for a given DCI rballoc (RIV format) and vrb type
1296 1297 1298 1299 1300 1301 1302 1303
   @param N_RB_DL number of PRB on DL
   @param indicator for even/odd slot
   @param vrb vrb index
   @param Ngap Gap indicator
*/
uint32_t get_prb(int N_RB_DL,int odd_slot,int vrb,int Ngap);

/* \brief Return prb for a given vrb index 
1304 1305 1306
   @param vrb_type VRB type (0=localized,1=distributed)
   @param rb_alloc_dci rballoc field from DCI
*/
1307
uint32_t get_rballoc(vrb_t vrb_type,uint16_t rb_alloc_dci);
1308

1309

1310 1311 1312
/* \brief Return bit-map of resource allocation for a given DCI rballoc (RIV format) and vrb type
   @returns Transmission mode (1-7)
*/
1313
uint8_t get_transmission_mode(module_id_t Mod_id, uint8_t CC_id, rnti_t rnti);
1314

1315

1316
/* \brief
1317
   @param ra_header Header of resource allocation (0,1) (See sections 7.1.6.1/7.1.6.2 of 36.213 Rel8.6)
1318
   @param rb_alloc Bitmap allocation from DCI (format 1,2)
1319 1320 1321 1322
   @returns number of physical resource blocks
*/
uint32_t conv_nprb(uint8_t ra_header,uint32_t rb_alloc,int N_RB_DL);

1323
int get_G(LTE_DL_FRAME_PARMS *frame_parms,uint16_t nb_rb,uint32_t *rb_alloc,uint8_t mod_order,uint8_t Nl,uint8_t num_pdcch_symbols,int frame,uint8_t subframe, uint8_t beamforming_mode);
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349

int adjust_G(LTE_DL_FRAME_PARMS *frame_parms,uint32_t *rb_alloc,uint8_t mod_order,uint8_t subframe);
int adjust_G2(LTE_DL_FRAME_PARMS *frame_parms,uint32_t *rb_alloc,uint8_t mod_order,uint8_t subframe,uint8_t symbol);


#ifndef modOrder
#define modOrder(I_MCS,I_TBS) ((I_MCS-I_TBS)*2+2) // Find modulation order from I_TBS and I_MCS
#endif

/** \fn uint8_t I_TBS2I_MCS(uint8_t I_TBS);
    \brief This function maps I_tbs to I_mcs according to Table 7.1.7.1-1 in 3GPP TS 36.213 V8.6.0. Where there is two supported modulation orders for the same I_TBS then either high or low modulation is chosen by changing the equality of the two first comparisons in the if-else statement.
    \param I_TBS Index of Transport Block Size
    \return I_MCS given I_TBS
*/
uint8_t I_TBS2I_MCS(uint8_t I_TBS);

/** \fn uint8_t SE2I_TBS(float SE,
    uint8_t N_PRB,
    uint8_t symbPerRB);
    \brief This function maps a requested throughput in number of bits to I_tbs. The throughput is calculated as a function of modulation order, RB allocation and number of symbols per RB. The mapping orginates in the "Transport block size table" (Table 7.1.7.2.1-1 in 3GPP TS 36.213 V8.6.0)
    \param SE Spectral Efficiency (before casting to integer, multiply by 1024, remember to divide result by 1024!)
    \param N_PRB Number of PhysicalResourceBlocks allocated \sa lte_frame_parms->N_RB_DL
    \param symbPerRB Number of symbols per resource block allocated to this channel
    \return I_TBS given an SE and an N_PRB
*/
uint8_t SE2I_TBS(float SE,
1350 1351
                 uint8_t N_PRB,
                 uint8_t symbPerRB);
1352 1353 1354 1355 1356 1357
/** \brief This function generates the sounding reference symbol (SRS) for the uplink according to 36.211 v8.6.0. If IFFT_FPGA is defined, the SRS is quantized to a QPSK sequence.
    @param frame_parms LTE DL Frame Parameters
    @param soundingrs_ul_config_dedicated Dynamic configuration from RRC during Connection Establishment
    @param txdataF pointer to the frequency domain TX signal
    @returns 0 on success*/
int generate_srs_rx(LTE_DL_FRAME_PARMS *frame_parms,
1358 1359
                    SOUNDINGRS_UL_CONFIG_DEDICATED *soundingrs_ul_config_dedicated,
                    int *txdataF);
1360

1361
int32_t generate_srs_tx_emul(PHY_VARS_UE *phy_vars_ue,
1362
                             uint8_t subframe);
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372

/*!
  \brief This function is similar to generate_srs_tx but generates a conjugate sequence for channel estimation. If IFFT_FPGA is defined, the SRS is quantized to a QPSK sequence.
  @param phy_vars_ue Pointer to PHY_VARS structure
  @param eNB_id Index of destination eNB for this SRS
  @param amp Linear amplitude of SRS
  @param subframe Index of subframe on which to act
  @returns 0 on success, -1 on error with message
*/

1373
int32_t generate_srs_tx(PHY_VARS_UE *phy_vars_ue,
1374 1375 1376
                        uint8_t eNB_id,
                        int16_t amp,
                        uint32_t subframe);
1377 1378 1379 1380 1381

/*!
  \brief This function generates the downlink reference signal for the PUSCH according to 36.211 v8.6.0. The DRS occuies the RS defined by rb_alloc and the symbols 2 and 8 for extended CP and 3 and 10 for normal CP.
*/

1382
int32_t generate_drs_pusch(PHY_VARS_UE *phy_vars_ue,
1383 1384 1385 1386 1387 1388
                           uint8_t eNB_id,
                           int16_t amp,
                           uint32_t subframe,
                           uint32_t first_rb,
                           uint32_t nb_rb,
                           uint8_t ant);
1389 1390 1391 1392 1393 1394

/*!
  \brief This function initializes the Group Hopping, Sequence Hopping and nPRS sequences for PUCCH/PUSCH according to 36.211 v8.6.0. It should be called after configuration of UE (reception of SIB2/3) and initial configuration of eNB (or after reconfiguration of cell-specific parameters).
  @param frame_parms Pointer to a LTE_DL_FRAME_PARMS structure (eNB or UE)*/
void init_ul_hopping(LTE_DL_FRAME_PARMS *frame_parms);

1395
int32_t compareints (const void * a, const void * b);
1396 1397 1398


void ulsch_modulation(mod_sym_t **txdataF,
1399 1400 1401 1402 1403
                      int16_t amp,
                      frame_t frame,
                      uint32_t subframe,
                      LTE_DL_FRAME_PARMS *frame_parms,
                      LTE_UE_ULSCH_t *ulsch);
1404 1405


1406
void ulsch_extract_rbs_single(int32_t **rxdataF,
1407 1408 1409 1410 1411 1412
                              int32_t **rxdataF_ext,
                              uint32_t first_rb,
                              uint32_t nb_rb,
                              uint8_t l,
                              uint8_t Ns,
                              LTE_DL_FRAME_PARMS *frame_parms);
1413

1414
uint8_t subframe2harq_pid(LTE_DL_FRAME_PARMS *frame_parms,frame_t frame,uint8_t subframe);
1415 1416
uint8_t subframe2harq_pid_eNBrx(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);

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int generate_ue_dlsch_params_from_dci(int frame,
				      uint8_t subframe,
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                                      void *dci_pdu,
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                                      rnti_t rnti,
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                                      DCI_format_t dci_format,
                                      LTE_UE_DLSCH_t **dlsch,
                                      LTE_DL_FRAME_PARMS *frame_parms,
                                      PDSCH_CONFIG_DEDICATED *pdsch_config_dedicated,
                                      uint16_t si_rnti,
                                      uint16_t ra_rnti,
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                                      uint16_t p_rnti,
                                      uint8_t beamforming_mode);
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int32_t generate_eNB_dlsch_params_from_dci(int frame,
    uint8_t subframe,
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    void *dci_pdu,
    rnti_t rnti,
    DCI_format_t dci_format,
    LTE_eNB_DLSCH_t **dlsch_eNB,
    LTE_DL_FRAME_PARMS *frame_parms,
    PDSCH_CONFIG_DEDICATED *pdsch_config_dedicated,
    uint16_t si_rnti,
    uint16_t ra_rnti,
    uint16_t p_rnti,
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    uint16_t DL_pmi_single,
    uint8_t beamforming_mode);
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int32_t generate_eNB_ulsch_params_from_rar(uint8_t *rar_pdu,
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    frame_t frame,
    uint8_t subframe,
    LTE_eNB_ULSCH_t *ulsch,
    LTE_DL_FRAME_PARMS *frame_parms);
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int generate_ue_ulsch_params_from_dci(void *dci_pdu,
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                                      rnti_t rnti,
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                                      uint8_t subframe,
                                      DCI_format_t dci_format,
                                      PHY_VARS_UE *phy_vars_ue,
                                      uint16_t si_rnti,
                                      uint16_t ra_rnti,
                                      uint16_t p_rnti,
                                      uint16_t cba_rnti,
                                      uint8_t eNB_id,
                                      uint8_t use_srs);
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int32_t generate_ue_ulsch_params_from_rar(PHY_VARS_UE *phy_vars_ue,
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    uint8_t eNB_id);
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double sinr_eff_cqi_calc(PHY_VARS_UE *phy_vars_ue,
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                         uint8_t eNB_id);
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int generate_eNB_ulsch_params_from_dci(void *dci_pdu,
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                                       rnti_t rnti,
                                       uint8_t subframe,
                                       DCI_format_t dci_format,
                                       uint8_t UE_id,
                                       PHY_VARS_eNB *PHY_vars_eNB,
                                       uint16_t si_rnti,
                                       uint16_t ra_rnti,
                                       uint16_t p_rnti,
                                       uint16_t cba_rnti,
                                       uint8_t use_srs);
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#ifdef USER_MODE
void dump_ulsch(PHY_VARS_eNB *phy_vars_eNb,uint8_t subframe, uint8_t UE_id);

void dump_dlsch(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint8_t subframe,uint8_t harq_pid);
void dump_dlsch_SI(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint8_t subframe);
void dump_dlsch_ra(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint8_t subframe);

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void dump_dlsch2(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint16_t coded_bits_per_codeword,int round);
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#endif

int dump_dci(LTE_DL_FRAME_PARMS *frame_parms, DCI_ALLOC_t *dci);

int dump_ue_stats(PHY_VARS_UE *phy_vars_ue, char* buffer, int length, runmode_t mode, int input_level_dBm);
int dump_eNB_stats(PHY_VARS_eNB *phy_vars_eNB, char* buffer, int length);



void generate_pcfich_reg_mapping(LTE_DL_FRAME_PARMS *frame_parms);

void pcfich_scrambling(LTE_DL_FRAME_PARMS *frame_parms,
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                       uint8_t subframe,
                       uint8_t *b,
                       uint8_t *bt);
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void pcfich_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
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                         uint8_t subframe,
                         int16_t *d);
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void generate_pcfich(uint8_t num_pdcch_symbols,
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                     int16_t amp,
                     LTE_DL_FRAME_PARMS *frame_parms,
                     mod_sym_t **txdataF,
                     uint8_t subframe);
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uint8_t rx_pcfich(LTE_DL_FRAME_PARMS *frame_parms,
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                  uint8_t subframe,
                  LTE_UE_PDCCH *lte_ue_pdcch_vars,
                  MIMO_mode_t mimo_mode);
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void generate_phich_reg_mapping(LTE_DL_FRAME_PARMS *frame_parms);


void init_transport_channels(uint8_t);

void generate_RIV_tables(void);

/*!
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  \brief This function performs the initial cell search procedure - PSS detection, SSS detection and PBCH detection.  At the
  end, the basic frame parameters are known (Frame configuration - TDD/FDD and cyclic prefix length,
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  N_RB_DL, PHICH_CONFIG and Nid_cell) and the UE can begin decoding PDCCH and DLSCH SI to retrieve the rest.  Once these
  parameters are know, the routine calls some basic initialization routines (cell-specific reference signals, etc.)
  @param phy_vars_ue Pointer to UE variables
*/
int initial_sync(PHY_VARS_UE *phy_vars_ue, runmode_t mode);

void rx_ulsch(PHY_VARS_eNB *phy_vars_eNB,
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              uint32_t subframe,
              uint8_t eNB_id,  // this is the effective sector id
              uint8_t UE_id,
              LTE_eNB_ULSCH_t **ulsch,
              uint8_t cooperation_flag);
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void rx_ulsch_emul(PHY_VARS_eNB *phy_vars_eNB,
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                   uint8_t subframe,
                   uint8_t sect_id,
                   uint8_t UE_index);
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/*!
  \brief Encoding of PUSCH/ACK/RI/ACK from 36-212.
  @param a Pointer to ulsch SDU
  @param frame_parms Pointer to Frame parameters
  @param ulsch Pointer to ulsch descriptor
  @param harq_pid HARQ process ID
  @param tmode Transmission mode (1-7)
  @param control_only_flag Generate PUSCH with control information only
  @param Nbundled Parameter for ACK/NAK bundling (36.213 Section 7.3)
*/
uint32_t ulsch_encoding(uint8_t *a,
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                        PHY_VARS_UE *phy_vars_ue,
                        uint8_t harq_pid,
                        uint8_t eNB_id,
                        uint8_t tmode,
                        uint8_t control_only_flag,
                        uint8_t Nbundled);
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/*!
  \brief Encoding of PUSCH/ACK/RI/ACK from 36-212 for emulation
  @param ulsch_buffer Pointer to ulsch SDU
  @param phy_vars_ue Pointer to UE top-level descriptor
  @param eNB_id ID of eNB receiving this PUSCH
  @param harq_pid HARQ process ID
  @param control_only_flag Generate PUSCH with control information only
*/
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int32_t ulsch_encoding_emul(uint8_t *ulsch_buffer,
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                            PHY_VARS_UE *phy_vars_ue,
                            uint8_t eNB_id,
                            uint8_t harq_pid,
                            uint8_t control_only_flag);
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/*!
  \brief Decoding of PUSCH/ACK/RI/ACK from 36-212.
  @param phy_vars_eNB Pointer to eNB top-level descriptor
  @param UE_id ID of UE transmitting this PUSCH
  @param subframe Index of subframe for PUSCH
  @param control_only_flag Receive PUSCH with control information only
  @param Nbundled Nbundled parameter for ACK/NAK scrambling from 36-212/36-213
  @param llr8_flag If 1, indicate that the 8-bit turbo decoder should be used
  @returns 0 on success
*/
unsigned int  ulsch_decoding(PHY_VARS_eNB *phy_vars_eNB,
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                             uint8_t UE_id,
                             uint8_t subframe,
                             uint8_t control_only_flag,
                             uint8_t Nbundled,
                             uint8_t llr8_flag);
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uint32_t ulsch_decoding_emul(PHY_VARS_eNB *phy_vars_eNB,
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                             uint8_t subframe,
                             uint8_t UE_index,
                             uint16_t *crnti);
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void generate_phich_top(PHY_VARS_eNB *phy_vars_eNB,
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                        uint8_t subframe,
                        int16_t amp,
                        uint8_t sect_id,
                        uint8_t abstraction_flag);
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/* \brief  This routine demodulates the PHICH and updates PUSCH/ULSCH parameters.
   @param phy_vars_ue Pointer to UE variables
   @param subframe Subframe of received PDCCH/PHICH
   @param eNB_id Index of eNB
*/

void rx_phich(PHY_VARS_UE *phy_vars_ue,
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              uint8_t subframe,
              uint8_t eNB_id);
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/** \brief  This routine provides the relationship between a PHICH TXOp and its corresponding PUSCH subframe (Table 8.3.-1 from 36.213).
    @param frame_parms Pointer to DL frame configuration parameters
    @param subframe Subframe of received/transmitted PHICH
    @returns subframe of PUSCH transmission
*/
uint8_t phich_subframe2_pusch_subframe(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);

/** \brief  This routine provides the relationship between a PHICH TXOp and its corresponding PUSCH frame (Table 8.3.-1 from 36.213).
    @param frame_parms Pointer to DL frame configuration parameters
    @param frame Frame of received/transmitted PHICH
    @param subframe Subframe of received/transmitted PHICH
    @returns frame of PUSCH transmission
*/
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uint8_t phich_frame2_pusch_frame(LTE_DL_FRAME_PARMS *frame_parms,frame_t frame,uint8_t subframe);
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void print_CQI(void *o,UCI_format_t uci_format,uint8_t eNB_id,int N_RB_DL);
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void extract_CQI(void *o,UCI_format_t uci_format,LTE_eNB_UE_stats *stats,uint8_t N_RB_DL, uint16_t * crnti, uint8_t * access_mode);
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void fill_CQI(LTE_UE_ULSCH_t *ulsch,PHY_MEASUREMENTS *meas,uint8_t eNB_id, uint8_t harq_pid,int N_RB_DL, rnti_t rnti, uint8_t trans_mode,double sinr_eff);
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void reset_cba_uci(void *o);

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uint16_t quantize_subband_pmi(PHY_MEASUREMENTS *meas,uint8_t eNB_id,int nb_subbands);
uint16_t quantize_subband_pmi2(PHY_MEASUREMENTS *meas,uint8_t eNB_id,uint8_t a_id,int nb_subbands);
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uint64_t pmi2hex_2Ar1(uint32_t pmi);
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uint64_t pmi2hex_2Ar2(uint32_t pmi);
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uint64_t cqi2hex(uint32_t cqi);
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uint16_t computeRIV(uint16_t N_RB_DL,uint16_t RBstart,uint16_t Lcrbs);

uint32_t pmi_extend(LTE_DL_FRAME_PARMS *frame_parms,uint8_t wideband_pmi);

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int get_nCCE_offset_l1(int *CCE_table,
		       const unsigned char L, 
		       const int nCCE, 
		       const int common_dci, 
		       const unsigned short rnti, 
		       const unsigned char subframe);
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uint16_t get_nCCE(uint8_t num_pdcch_symbols,LTE_DL_FRAME_PARMS *frame_parms,uint8_t mi);

uint16_t get_nquad(uint8_t num_pdcch_symbols,LTE_DL_FRAME_PARMS *frame_parms,uint8_t mi);

uint8_t get_mi(LTE_DL_FRAME_PARMS *frame,uint8_t subframe);

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uint16_t get_nCCE_mac(uint8_t Mod_id,uint8_t CC_id,int num_pdcch_symbols,int subframe);
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uint8_t get_num_pdcch_symbols(uint8_t num_dci,DCI_ALLOC_t *dci_alloc,LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);

void pdcch_interleaving(LTE_DL_FRAME_PARMS *frame_parms,mod_sym_t **z, mod_sym_t **wbar,uint8_t n_symbols_pdcch,uint8_t mi);

void pdcch_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
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                        uint8_t subframe,
                        int8_t* llr,
                        uint32_t length);
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void pdcch_scrambling(LTE_DL_FRAME_PARMS *frame_parms,
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                      uint8_t subframe,
                      uint8_t *e,
                      uint32_t length);
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void dlsch_scrambling(LTE_DL_FRAME_PARMS *frame_parms,
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                      int mbsfn_flag,
                      LTE_eNB_DLSCH_t *dlsch,
                      int G,
                      uint8_t q,
                      uint8_t Ns);
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void dlsch_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
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                        int mbsfn_flag,
                        LTE_UE_DLSCH_t *dlsch,
                        int G,
                        int16_t* llr,
                        uint8_t q,
                        uint8_t Ns);
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void init_ncs_cell(LTE_DL_FRAME_PARMS *frame_parms,uint8_t ncs_cell[20][7]);

void generate_pucch(mod_sym_t **txdataF,
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                    LTE_DL_FRAME_PARMS *frame_parms,
                    uint8_t ncs_cell[20][7],
                    PUCCH_FMT_t fmt,
                    PUCCH_CONFIG_DEDICATED *pucch_config_dedicated,
                    uint16_t n1_pucch,
                    uint16_t n2_pucch,
                    uint8_t shortened_format,
                    uint8_t *payload,
                    int16_t amp,
                    uint8_t subframe);
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void generate_pucch_emul(PHY_VARS_UE *phy_vars_ue,
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                         PUCCH_FMT_t format,
                         uint8_t ncs1,
                         uint8_t *pucch_ack_payload,
                         uint8_t sr,
                         uint8_t subframe);
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uint32_t rx_pucch(PHY_VARS_eNB *phy_vars_eNB,
		  PUCCH_FMT_t fmt,
		  uint8_t UE_id,
		  uint16_t n1_pucch,
		  uint16_t n2_pucch,
		  uint8_t shortened_format,
		  uint8_t *payload,
		  uint8_t subframe,
		  uint8_t pucch1_thres);
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int32_t rx_pucch_emul(PHY_VARS_eNB *phy_vars_eNB,
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		       uint8_t UE_index,
		       PUCCH_FMT_t fmt,
		       uint8_t n1_pucch_sel,
		       uint8_t *payload,
		       uint8_t subframe);
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/*!
  \brief Check for PRACH TXop in subframe
  @param frame_parms Pointer to LTE_DL_FRAME_PARMS
  @param frame frame index to check
  @param subframe subframe index to check
  @returns 0 on success
*/
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int is_prach_subframe(LTE_DL_FRAME_PARMS *frame_parms,frame_t frame, uint8_t subframe);
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/*!
  \brief Generate PRACH waveform
  @param phy_vars_ue Pointer to ue top-level descriptor
  @param eNB_id Index of destination eNB
  @param subframe subframe index to operate on
  @param index of preamble (0-63)
  @param Nf System frame number
  @returns 0 on success
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*/
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int32_t generate_prach(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint8_t subframe,uint16_t Nf);
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/*!
  \brief Process PRACH waveform
  @param phy_vars_eNB Pointer to eNB top-level descriptor
  @param subframe subframe index to operate on
  @param preamble_energy_list List of energies for each candidate preamble
  @param preamble_delay_list List of delays for each candidate preamble
  @param Nf System frame number
  @param tdd_mapindex Index of PRACH resource in Table 5.7.1-4 (TDD)
  @returns 0 on success
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*/
void rx_prach(PHY_VARS_eNB *phy_vars_eNB,uint8_t subframe,uint16_t *preamble_energy_list, uint16_t *preamble_delay_list, uint16_t Nf, uint8_t tdd_mapindex);

/*!
  \brief Helper for MAC, returns number of available PRACH in TDD for a particular configuration index
  @param frame_parms Pointer to LTE_DL_FRAME_PARMS structure
  @returns 0-5 depending on number of available prach
*/
uint8_t get_num_prach_tdd(LTE_DL_FRAME_PARMS *frame_parms);

/*!
  \brief Return the PRACH format as a function of the Configuration Index and Frame type.
  @param prach_ConfigIndex PRACH Configuration Index
  @param frame_type 0-FDD, 1-TDD
  @returns 0-1 accordingly
*/
uint8_t get_prach_fmt(uint8_t prach_ConfigIndex,lte_frame_type_t frame_type);

/*!
  \brief Helper for MAC, returns frequency index of PRACH resource in TDD for a particular configuration index
  @param frame_parms Pointer to LTE_DL_FRAME_PARMS structure
  @returns 0-5 depending on number of available prach
*/
uint8_t get_fid_prach_tdd(LTE_DL_FRAME_PARMS *frame_parms,uint8_t tdd_map_index);

/*!
  \brief Comp ute DFT of PRACH ZC sequences.  Used for generation of prach in UE and reception of PRACH in eNB.
  @param prach_config_common Pointer to prachConfigCommon structure
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  @param Xu DFT output
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*/
void compute_prach_seq(PRACH_CONFIG_COMMON *prach_config_common,
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                       lte_frame_type_t frame_type,
                       uint32_t X_u[64][839]);
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void init_prach_tables(int N_ZC);

/*!
  \brief Return the status of MBSFN in this frame/subframe
  @param frame Frame index
  @param subframe Subframe index
  @param frame_parms Pointer to frame parameters
  @returns 1 if subframe is for MBSFN
*/
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int is_pmch_subframe(frame_t frame, int subframe, LTE_DL_FRAME_PARMS *frame_parms);
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uint8_t is_not_pilot(uint8_t pilots, uint8_t re, uint8_t nushift, uint8_t use2ndpilots);
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uint8_t is_not_UEspecRS(int8_t lprime, uint8_t re, uint8_t nushift, uint8_t Ncp, uint8_t beamforming_mode);

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uint32_t dlsch_decoding_abstraction(double *dlsch_MIPB,