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Commit 8934fed8 authored by Sandeep Kumar's avatar Sandeep Kumar
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fixed issue with offset and sign extension

parent 5f0e15a4
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Showing with 45 additions and 60 deletions
openair1/PHY/LTE_TRANSPORT/if4_tools.c
View file @ 8934fed8
......@@ -29,11 +29,11 @@
/*! \file PHY/LTE_TRANSPORT/if4_tools.c
* \brief
* \author Fredrik Skretteberg, Tobias Schuster, Mauricio Gunther, S. Sandeep Kumar, Raymond Knopp
* \author S. Sandeep Kumar, Raymond Knopp
* \date 2016
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \email: ee13b1025@iith.ac.in, knopp@eurecom.fr
* \note
* \warning
*/
......@@ -44,7 +44,6 @@
#include "targets/ARCH/ETHERNET/USERSPACE/LIB/if_defs.h"
// --- Careful to handle buffer memory --- RAW/UDP modes --- PRACH variables and data
void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type, int k) {
LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
int32_t **txdataF = eNB->common_vars.txdataF[0];
......@@ -56,35 +55,33 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
int slotoffsetF=0, blockoffsetF=0;
void *tx_buffer=NULL;
int16_t *data_block=NULL;
uint16_t *data_block=NULL, *i=NULL;
if (packet_type == IF4_PDLFFT) {
db_fulllength = 12*fp->N_RB_DL;
db_halflength = (db_fulllength)>>1;
slotoffsetF = (subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(int16_t));
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(uint16_t));
IF4_header_t *dl_header = (IF4_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
data_block = (uint16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
gen_IF4_dl_header(dl_header, frame, subframe);
for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {
// Do compression of the two parts and generate data blocks
for (element_id=0; element_id<db_halflength; element_id++) {
data_block[element_id] = lin2alaw[ (txdataF[0][blockoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id] |= lin2alaw[ (txdataF[0][blockoffsetF+element_id]>>16) + 32768 ]<<8;
data_block[element_id+db_halflength] = lin2alaw[ (txdataF[0][slotoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id+db_halflength] |= lin2alaw[ (txdataF[0][slotoffsetF+element_id]>>16) + 32768 ]<<8;
i = (uint16_t*) &txdataF[0][blockoffsetF+element_id];
data_block[element_id] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
i = (uint16_t*) &txdataF[0][slotoffsetF+element_id];
data_block[element_id+db_halflength] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
}
// Update information in generated packet
dl_header->frame_status &= ~(0x000f<<26);
dl_header->frame_status |= (symbol_id&0x000f)<<26;
// Write the packet to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
symbol_id,
&tx_buffer,
......@@ -101,29 +98,27 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
db_fulllength = 12*fp->N_RB_UL;
db_halflength = (db_fulllength)>>1;
slotoffsetF = (subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(int16_t));
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(uint16_t));
IF4_header_t *ul_header = (IF4_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
data_block = (uint16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
gen_IF4_ul_header(ul_header, frame, subframe);
for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {
// Do compression of the two parts and generate data blocks - rxdataF
for (element_id=0; element_id<db_halflength; element_id++) {
data_block[element_id] = lin2alaw[ (rxdataF[0][blockoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id] |= lin2alaw[ (rxdataF[0][blockoffsetF+element_id]>>16) + 32768 ]<<8;
data_block[element_id+db_halflength] = lin2alaw[ (rxdataF[0][slotoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id+db_halflength] |= lin2alaw[ (rxdataF[0][slotoffsetF+element_id]>>16) + 32768 ]<<8;
i = (uint16_t*) &rxdataF[0][blockoffsetF+element_id];
data_block[element_id] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
i = (uint16_t*) &rxdataF[0][slotoffsetF+element_id];
data_block[element_id+db_halflength] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
}
// Update information in generated packet
ul_header->frame_status &= ~(0x000f<<26);
ul_header->frame_status |= (symbol_id&0x000f)<<26;
// Write the packet(s) to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
symbol_id,
&tx_buffer,
......@@ -142,7 +137,7 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(int16_t));
IF4_header_t *prach_header = (IF4_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
data_block = (uint16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
gen_IF4_prach_header(prach_header, frame, subframe);
......@@ -155,7 +150,6 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
// prachoffsetF += 2;
//}
// Write the packet to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
symbol_id,
&tx_buffer,
......@@ -192,9 +186,8 @@ void recv_IF4(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_typ
void *rx_buffer=NULL;
IF4_header_t *packet_header=NULL;
int16_t *data_block=NULL;
uint16_t *data_block=NULL, *i=NULL;
// Read packet(s) from the fronthaul
if (eNB->ifdevice.trx_read_func(&eNB->ifdevice,
(int64_t*) packet_type,
&rx_buffer,
......@@ -204,43 +197,41 @@ void recv_IF4(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_typ
}
packet_header = (IF4_header_t*) (rx_buffer+MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*) (rx_buffer+MAC_HEADER_SIZE_BYTES+sizeof_IF4_header_t);
data_block = (uint16_t*) (rx_buffer+MAC_HEADER_SIZE_BYTES+sizeof_IF4_header_t);
*frame = ((packet_header->frame_status)>>6)&0xffff;
*subframe = ((packet_header->frame_status)>>22)&0x000f;
if (*packet_type == IF4_PDLFFT) {
// Find and return symbol_number
*symbol_number = ((packet_header->frame_status)>>26)&0x000f;
// Calculate from received packet
slotoffsetF = (*symbol_number)*(fp->ofdm_symbol_size) + (*subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
// Do decompression of the two parts and generate txdataF
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
for (element_id=0; element_id<db_halflength; element_id++) {
txdataF[0][blockoffsetF+element_id] = alaw2lin[ (data_block[element_id] & 0xff) ];
txdataF[0][blockoffsetF+element_id] |= alaw2lin[ (data_block[element_id]>>8) ]<<16;
i = (uint16_t*) &txdataF[0][blockoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id]>>8) ];
txdataF[0][slotoffsetF+element_id] = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
txdataF[0][slotoffsetF+element_id] |= alaw2lin[ (data_block[element_id+db_halflength]>>8) ]<<16;
i = (uint16_t*) &txdataF[0][slotoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id+db_halflength]>>8) ];
}
} else if (*packet_type == IF4_PULFFT) {
// Find and return symbol_number
*symbol_number = ((packet_header->frame_status)>>26)&0x000f;
// Calculate from received packet
slotoffsetF = (*symbol_number)*(fp->ofdm_symbol_size) + (*subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
// Do decompression of the two parts and generate rxdataF
for (element_id=0; element_id<db_halflength; element_id++) {
rxdataF[0][blockoffsetF+element_id] = alaw2lin[ (data_block[element_id] & 0xff) ];
rxdataF[0][blockoffsetF+element_id] |= alaw2lin[ (data_block[element_id]>>8) ]<<16;
i = (uint16_t*) &rxdataF[0][blockoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id]>>8) ];
rxdataF[0][slotoffsetF+element_id] = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
rxdataF[0][slotoffsetF+element_id] |= alaw2lin[ (data_block[element_id+db_halflength]>>8) ]<<16;
i = (uint16_t*) &rxdataF[0][slotoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id+db_halflength]>>8) ];
}
} else if (*packet_type == IF4_PRACH) {
......@@ -260,11 +251,9 @@ void recv_IF4(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_typ
void gen_IF4_dl_header(IF4_header_t *dl_packet, int frame, int subframe) {
// Set Type and Sub-Type
dl_packet->type = IF4_PACKET_TYPE;
dl_packet->sub_type = IF4_PDLFFT;
// Reset frame status
dl_packet->rsvd = 0;
// Set frame status
......@@ -276,11 +265,9 @@ void gen_IF4_dl_header(IF4_header_t *dl_packet, int frame, int subframe) {
void gen_IF4_ul_header(IF4_header_t *ul_packet, int frame, int subframe) {
// Set Type and Sub-Type
ul_packet->type = IF4_PACKET_TYPE;
ul_packet->sub_type = IF4_PULFFT;
// Leave reserved as it is
ul_packet->rsvd = 0;
// Set frame status
......@@ -292,11 +279,9 @@ void gen_IF4_ul_header(IF4_header_t *ul_packet, int frame, int subframe) {
void gen_IF4_prach_header(IF4_header_t *prach_packet, int frame, int subframe) {
// Set Type and Sub-Type
prach_packet->type = IF4_PACKET_TYPE;
prach_packet->sub_type = IF4_PRACH;
// Leave reserved as it is
prach_packet->rsvd = 0;
// Set LTE Prach configuration
......
openair1/PHY/TOOLS/alaw_lut.h
View file @ 8934fed8
This diff is collapsed.
targets/ARCH/ETHERNET/USERSPACE/LIB/if_defs.h
View file @ 8934fed8
......@@ -59,7 +59,7 @@
#define RAW_PACKET_SIZE_BYTES(nsamps) (APP_HEADER_SIZE_BYTES + MAC_HEADER_SIZE_BYTES + PAYLOAD_SIZE_BYTES(nsamps))
// Packet sizes for IF4 interface format
#define DATA_BLOCK_SIZE_BYTES(scaled_nblocks) (sizeof(int16_t)*scaled_nblocks)
#define DATA_BLOCK_SIZE_BYTES(scaled_nblocks) (sizeof(uint16_t)*scaled_nblocks)
#define PRACH_BLOCK_SIZE_BYTES (sizeof(int16_t)*839*2) // FIX hard coded prach size (uncompressed)
#define RAW_IF4_PDLFFT_SIZE_BYTES(nblocks) (MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + DATA_BLOCK_SIZE_BYTES(nblocks))
......
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