proto.h

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 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.0  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
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 * Unless required by applicable law or agreed to in writing, software
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 * See the License for the specific language governing permissions and
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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_
 * @{
 */

/** \fn free_eNB_dlsch(LTE_eNB_DLSCH_t *dlsch,unsigned char N_RB_DL)
    \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);

/** \fn new_eNB_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_eNB_DLSCH_t *new_eNB_dlsch(uint8_t Kmimo,uint8_t Mdlharq,uint32_t Nsoft,uint8_t N_RB_DL, uint8_t abstraction_flag);

/** \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);

/** \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);


void clean_eNb_ulsch(LTE_eNB_ULSCH_t *ulsch);

void free_ue_ulsch(LTE_UE_ULSCH_t *ulsch);

LTE_eNB_ULSCH_t *new_eNB_ulsch(uint8_t max_turbo_iterations,uint8_t N_RB_UL, uint8_t abstraction_flag);

LTE_UE_ULSCH_t *new_ue_ulsch(unsigned char N_RB_UL, uint8_t abstraction_flag);

/** \fn dlsch_encoding(PHY_VARS_eNB *eNB,
    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 eNB Pointer to eNB PHY context
    @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
*/
int32_t dlsch_encoding(PHY_VARS_eNB *eNB,
		       uint8_t *a,
                       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);

/** \fn dlsch_encoding_2threads(PHY_VARS_eNB *eNB,
    uint8_t *input_buffer,
    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). This version spawns 1 worker thread. 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 eNB Pointer to eNB PHY context
    @param input_buffer Pointer to input buffer for sub-frame
    @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
*/
int32_t dlsch_encoding_2threads(PHY_VARS_eNB *eNB,
				uint8_t *a,
				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);

void dlsch_encoding_emul(PHY_VARS_eNB *phy_vars_eNB,
                         uint8_t *DLSCH_pdu,
                         LTE_eNB_DLSCH_t *dlsch);


// Functions below implement 36-211

/** \fn allocate_REs_in_RB(int32_t **txdataF,
    uint32_t *jj,
    uint32_t *jj2,
    uint16_t re_offset,
    uint32_t symbol_offset,
    LTE_DL_eNB_HARQ_t *dlsch0_harq,
    LTE_DL_eNB_HARQ_t *dlsch1_harq,
    uint8_t pilots,
    int16_t amp,
    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)
    \param jj index to output (from CW 1)
    \param jj index to output (from CW 2)
    \param re_offset index of the first RE of the RB
    \param symbol_offset index to the OFDM symbol
    \param dlsch0_harq Pointer to Transport block 0 HARQ structure
    \param dlsch0_harq Pointer to Transport block 1 HARQ structure
    \param pilots =1 if symbol_offset is an OFDM symbol that contains pilots, 0 otherwise
    \param amp Amplitude for symbols
    \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)
    \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
    \param use2ndpilots Set to use the pilots from antenna port 1 for PDSCH
    \param frame_parms Frame parameter descriptor
*/

int32_t allocate_REs_in_RB(LTE_DL_FRAME_PARMS *frame_parms,
                           int32_t **txdataF,
                           uint32_t *jj,
                           uint32_t *jj2,
                           uint16_t re_offset,
                           uint32_t symbol_offset,
                           LTE_DL_eNB_HARQ_t *dlsch0_harq,
                           LTE_DL_eNB_HARQ_t *dlsch1_harq,
                           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,
                           uint8_t skip_half,
			   int *P1_SHIFT,
			   int *P2_SHIFT);


/** \fn int32_t dlsch_modulation(int32_t **txdataF,
    int16_t amp,
    uint32_t sub_frame_offset,
    LTE_DL_FRAME_PARMS *frame_parms,
    uint8_t num_pdcch_symbols,
    LTE_eNB_DLSCH_t *dlsch);

    \brief This function is the top-level routine for generation of the sub-frame signal (frequency-domain) for DLSCH.
    @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
    @param dlsch0 Pointer to Transport Block 0 DLSCH descriptor for this allocation
    @param dlsch1 Pointer to Transport Block 0 DLSCH descriptor for this allocation

*/
int32_t dlsch_modulation(int32_t **txdataF,
                         int16_t amp,
                         uint32_t sub_frame_offset,
                         LTE_DL_FRAME_PARMS *frame_parms,
                         uint8_t num_pdcch_symbols,
                         LTE_eNB_DLSCH_t *dlsch0,
                         LTE_eNB_DLSCH_t *dlsch1);
/*
  \brief This function is the top-level routine for generation of the sub-frame signal (frequency-domain) for MCH.
  @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(int32_t **txdataF,
                   int16_t amp,
                   uint32_t subframe_offset,
                   LTE_DL_FRAME_PARMS *frame_parms,
                   LTE_eNB_DLSCH_t *dlsch);

/** \brief Top-level generation function for eNB TX of MBSFN
    @param phy_vars_eNB Pointer to eNB variables
    @param a Pointer to transport block
    @param abstraction_flag

*/
void generate_mch(PHY_VARS_eNB *phy_vars_eNB,eNB_rxtx_proc_t *proc,uint8_t *a);

/** \brief This function generates the frequency-domain pilots (cell-specific downlink reference signals)
    @param phy_vars_eNB Pointer to eNB variables
    @param proc Pointer to RXn-TXnp4 proc information
    @param mcs MCS for MBSFN
    @param ndi new data indicator
    @param rdvix
*/
void fill_eNB_dlsch_MCH(PHY_VARS_eNB *phy_vars_eNB,int mcs,int ndi,int rvidx);

/** \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,
            unsigned char eNB_id,
            uint8_t subframe,
            unsigned char symbol);

/** \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,
                     int32_t **txdataF,
                     int16_t amp,
                     uint16_t N);

/**
   \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)
*/
int32_t generate_pilots_slot(PHY_VARS_eNB *phy_vars_eNB,
                             int32_t **txdataF,
                             int16_t amp,
                             uint16_t slot,
                             int first_pilot_only);

int32_t generate_mbsfn_pilot(PHY_VARS_eNB *phy_vars_eNB,
                             eNB_rxtx_proc_t *proc,
			     int32_t **txdataF,
                             int16_t amp);

int32_t generate_pss(int32_t **txdataF,
                     int16_t amp,
                     LTE_DL_FRAME_PARMS *frame_parms,
                     uint16_t l,
                     uint16_t Ns);

int32_t generate_pss_emul(PHY_VARS_eNB *phy_vars_eNB,uint8_t sect_id);

int32_t generate_sss(int32_t **txdataF,
                     short amp,
                     LTE_DL_FRAME_PARMS *frame_parms,
                     unsigned short symbol,
                     unsigned short slot_offset);

int32_t generate_pbch(LTE_eNB_PBCH *eNB_pbch,
                      int32_t **txdataF,
                      int32_t amp,
                      LTE_DL_FRAME_PARMS *frame_parms,
                      uint8_t *pbch_pdu,
                      uint8_t frame_mod4);

int32_t generate_pbch_emul(PHY_VARS_eNB *phy_vars_eNB,uint8_t *pbch_pdu);

/** \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*/
void qpsk_qpsk(int16_t *stream0_in,
               int16_t *stream1_in,
               int16_t *stream0_out,
               int16_t *rho01,
               int32_t length);

/** \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*/
int32_t dlsch_qpsk_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
                            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);

/** \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*/
void qpsk_qam16(int16_t *stream0_in,
                int16_t *stream1_in,
                short *ch_mag_i,
                int16_t *stream0_out,
                int16_t *rho01,
                int32_t length);

/** \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*/
int32_t dlsch_qpsk_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                             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);

/** \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*/
void qpsk_qam64(int16_t *stream0_in,
                int16_t *stream1_in,
                short *ch_mag_i,
                int16_t *stream0_out,
                int16_t *rho01,
                int32_t length);

/** \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*/
int32_t dlsch_qpsk_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                             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);


/** \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,
                int length);
/** \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
    @param first_symbol_flag
    @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
*/
int32_t dlsch_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
                       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,
                       int16_t **llr128p);

/**
   \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
*/

void dlsch_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                     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,
                     int16_t **llr128p);

/**
   \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)
*/
void dlsch_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
                     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,
                     short **llr_save);

/** \fn dlsch_siso(LTE_DL_FRAME_PARMS *frame_parms,
    int32_t **rxdataF_comp,
    int32_t **rxdataF_comp_i,
    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,
                int32_t **rxdataF_comp,
                int32_t **rxdataF_comp_i,
                uint8_t l,
                uint16_t nb_rb);

/** \fn dlsch_alamouti(LTE_DL_FRAME_PARMS *frame_parms,
    int32_t **rxdataF_comp,
    int32_t **dl_ch_mag,
    int32_t **dl_ch_magb,
    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,
                    int32_t **rxdataF_comp,
                    int32_t **dl_ch_mag,
                    int32_t **dl_ch_magb,
                    uint8_t symbol,
                    uint16_t nb_rb);

/** \fn dlsch_antcyc(LTE_DL_FRAME_PARMS *frame_parms,
    int32_t **rxdataF_comp,
    int32_t **dl_ch_mag,
    int32_t **dl_ch_magb,
    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,
                  int32_t **rxdataF_comp,
                  int32_t **dl_ch_mag,
                  int32_t **dl_ch_magb,
                  uint8_t symbol,
                  uint16_t nb_rb);

/** \fn dlsch_detection_mrc(LTE_DL_FRAME_PARMS *frame_parms,
    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,
    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,
                         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);

/** \fn dlsch_extract_rbs_single(int32_t **rxdataF,
    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,
    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
    @param vrb_type Flag to indicate distributed VRB type
    @param high_speed_flag
    @param frame_parms Pointer to frame descriptor
*/
uint16_t dlsch_extract_rbs_single(int32_t **rxdataF,
                                  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);

/** \fn dlsch_extract_rbs_dual(int32_t **rxdataF,
    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,
    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
    @param high_speed_flag
    @param frame_parms Pointer to frame descriptor
*/
uint16_t dlsch_extract_rbs_dual(int32_t **rxdataF,
                                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);

/** \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)
    @param rxdataF_comp Compensated received waveform
    @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
*/
void dlsch_channel_compensation(int32_t **rxdataF_ext,
                                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);

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);

void dlsch_channel_compensation_TM56(int **rxdataF_ext,
                                     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);

void dlsch_channel_compensation_TM3(LTE_DL_FRAME_PARMS *frame_parms,
                                    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,