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Fix memory issues in PSCCH decoder

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master
Xavier Arteaga 5 years ago committed by Andre Puschmann
parent eed6240a4b
commit a0fb150e58
4 changed files with 45 additions and 69 deletions
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16
lib/include/srslte/phy/common/phy_common_sl.h
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@ -44,10 +44,10 @@ typedef enum SRSLTE_API {
} srslte_sl_tm_t;
typedef enum SRSLTE_API {
SRSLTE_SIDELINK_PSBCH = 0,
SRSLTE_SIDELINK_PSCCH,
SRSLTE_SIDELINK_PSSCH,
SRSLTE_SIDELINK_PSDCH
SRSLTE_SIDELINK_PSBCH = 0, // Physical Sidelink Broadcast Channel
SRSLTE_SIDELINK_PSCCH, // Physical Sidelink Control Channel
SRSLTE_SIDELINK_PSSCH, // Physical Sidelink Shared Channel
SRSLTE_SIDELINK_PSDCH // Physical Sidelink Discovery Channel
} srslte_sl_channels_t;
typedef struct SRSLTE_API {
@ -109,8 +109,6 @@ typedef enum SRSLTE_API {
#define SRSLTE_PSCCH_MAX_NOF_PRB (SRSLTE_PSCCH_TM34_NOF_PRB)
#define SRSLTE_PSCCH_SCRAMBLING_SEED (510) ///< Scrambling seed for PSCCH is 510
#define SRSLTE_PSCCH_MAX_CODED_BITS (3 * (SRSLTE_SCI_MAX_LEN + SRSLTE_SCI_CRC_LEN))
#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS (12)
#define SRSLTE_PSCCH_TM12_NUM_DMRS_SYMBOLS (2)
#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS_EXT (10)
@ -118,6 +116,12 @@ typedef enum SRSLTE_API {
#define SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS (10)
#define SRSLTE_PSCCH_TM34_NUM_DMRS_SYMBOLS (4)
#define SRSLTE_PSCCH_TM12_NOF_CODED_BITS \
(SRSLTE_NRE * SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS * SRSLTE_PSCCH_TM12_NOF_PRB * SRSLTE_PSCCH_QM)
#define SRSLTE_PSCCH_TM34_NOF_CODED_BITS \
(SRSLTE_NRE * SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS * SRSLTE_PSCCH_TM34_NOF_PRB * SRSLTE_PSCCH_QM)
#define SRSLTE_PSCCH_MAX_CODED_BITS SRSLTE_MAX(SRSLTE_PSCCH_TM12_NOF_CODED_BITS, SRSLTE_PSCCH_TM34_NOF_CODED_BITS)
#define SRSLTE_PSSCH_CRC_LEN 24
#define SRSLTE_MAX_CODEWORD_LEN 168000 // 12 subcarriers * 100 PRB * 14 symbols * 10 bits, assuming 1024QAM
#define SRSLTE_SL_SCH_MAX_TB_LEN 1000000 // Must be checked in 3GPP

38
lib/src/phy/ch_estimation/chest_sl.c
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@ -296,14 +296,6 @@ static void chest_sl_psbch_ls_estimate(srslte_chest_sl_t* q, cf_t* sf_buffer)
interpolate_pilots_sl_psbch(q);
}
static void chest_sl_psbch_ls_equalize(srslte_chest_sl_t* q, cf_t* sf_buffer, cf_t* equalized_sf_buffer)
{
srslte_chest_sl_estimate_noise(q);
// Perform channel equalization
srslte_predecoding_single(sf_buffer, q->ce_average, equalized_sf_buffer, NULL, q->sf_n_re, 1, q->noise_estimated);
}
static int chest_sl_pscch_gen(srslte_chest_sl_t* q, uint32_t cyclic_shift)
{
// M_sc_rs - Reference Signal Length
@ -524,14 +516,6 @@ static void chest_sl_pscch_ls_estimate(srslte_chest_sl_t* q, cf_t* sf_buffer)
interpolate_pilots_sl_pscch(q);
}
static void chest_sl_pscch_ls_equalize(srslte_chest_sl_t* q, cf_t* sf_buffer, cf_t* equalized_sf_buffer)
{
srslte_chest_sl_estimate_noise(q);
// Perform channel equalization
srslte_predecoding_single(sf_buffer, q->ce_average, equalized_sf_buffer, NULL, q->sf_n_re, 1.0, q->noise_estimated);
}
static int chest_sl_pssch_gen(srslte_chest_sl_t* q)
{
// M_sc_rs - Reference Signal Length
@ -964,14 +948,6 @@ static void chest_sl_pssch_ls_estimate(srslte_chest_sl_t* q, cf_t* sf_buffer)
interpolate_pilots_sl_pssch(q);
}
static void chest_sl_pssch_ls_equalize(srslte_chest_sl_t* q, cf_t* sf_buffer, cf_t* equalized_sf_buffer)
{
srslte_chest_sl_estimate_noise(q);
// Perform channel equalization
srslte_predecoding_single(sf_buffer, q->ce_average, equalized_sf_buffer, NULL, q->sf_n_re, 1.0, q->noise_estimated);
}
static void get_subband_noise(srslte_chest_sl_t* q, uint32_t k_start, uint32_t k_end, uint32_t sf_nsymbols)
{
for (int k = k_start; k < k_end; k++) {
@ -1241,16 +1217,10 @@ void srslte_chest_sl_ls_estimate(srslte_chest_sl_t* q, cf_t* sf_buffer)
void srslte_chest_sl_ls_equalize(srslte_chest_sl_t* q, cf_t* sf_buffer, cf_t* equalized_sf_buffer)
{
switch (q->channel) {
case SRSLTE_SIDELINK_PSBCH:
return chest_sl_psbch_ls_equalize(q, sf_buffer, equalized_sf_buffer);
case SRSLTE_SIDELINK_PSCCH:
return chest_sl_pscch_ls_equalize(q, sf_buffer, equalized_sf_buffer);
case SRSLTE_SIDELINK_PSSCH:
return chest_sl_pssch_ls_equalize(q, sf_buffer, equalized_sf_buffer);
default:
return;
}
srslte_chest_sl_estimate_noise(q);
// Perform channel equalization
srslte_predecoding_single(sf_buffer, q->ce_average, equalized_sf_buffer, NULL, q->sf_n_re, 1.0, q->noise_estimated);
}
void srslte_chest_sl_ls_estimate_equalize(srslte_chest_sl_t* q, cf_t* sf_buffer, cf_t* equalized_sf_buffer)

8
lib/src/phy/phch/pscch.c
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@ -168,6 +168,7 @@ int srslte_pscch_set_cell(srslte_pscch_t* q, srslte_cell_sl_t cell)
q->sci_len = srslte_sci_format0_sizeof(cell.nof_prb);
q->nof_symbols = SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS;
q->pscch_nof_prb = SRSLTE_PSCCH_TM12_NOF_PRB;
q->E = SRSLTE_PSCCH_TM12_NOF_CODED_BITS;
if (cell.cp == SRSLTE_CP_EXT) {
q->nof_symbols = SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS_EXT;
@ -176,15 +177,13 @@ int srslte_pscch_set_cell(srslte_pscch_t* q, srslte_cell_sl_t cell)
q->sci_len = SRSLTE_SCI_TM34_LEN;
q->nof_symbols = SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS;
q->pscch_nof_prb = SRSLTE_PSCCH_TM34_NOF_PRB;
q->E = SRSLTE_PSCCH_TM34_NOF_CODED_BITS;
} else {
return ret;
}
q->cell = cell;
///< Calculate actual number of RE
q->E = SRSLTE_NRE * q->nof_symbols * q->pscch_nof_prb * SRSLTE_PSCCH_QM;
///< Last OFDM symbol is processed but not transmitted
q->nof_tx_re = (q->nof_symbols - 1) * SRSLTE_NRE * q->pscch_nof_prb;
@ -323,6 +322,9 @@ int srslte_pscch_get(srslte_pscch_t* q, cf_t* sf_buffer, uint32_t prb_start_idx)
}
}
// Force zeros in last symbol
srslte_vec_cf_zero(&q->scfdma_symbols[sample_pos], SRSLTE_NRE * q->pscch_nof_prb);
return sample_pos;
}

48
lib/src/phy/phch/test/pscch_file_test.c
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@ -34,27 +34,27 @@
#include "srslte/phy/utils/debug.h"
#include "srslte/phy/utils/vector.h"
char* input_file_name;
srslte_cell_sl_t cell = {.nof_prb = 6, .N_sl_id = 0, .tm = SRSLTE_SIDELINK_TM2, .cp = SRSLTE_CP_NORM};
bool use_standard_lte_rates = false;
uint32_t file_offset = 0;
uint32_t sf_n_samples;
uint32_t sf_n_re;
cf_t* sf_buffer;
cf_t* equalized_sf_buffer;
cf_t* input_buffer;
srslte_sci_t sci;
srslte_pscch_t pscch;
srslte_chest_sl_t pscch_chest;
srslte_ofdm_t fft;
srslte_sl_comm_resource_pool_t sl_comm_resource_pool;
uint32_t size_sub_channel = 10;
uint32_t num_sub_channel = 5;
srslte_chest_sl_cfg_t pscch_chest_sl_cfg;
srslte_filesource_t fsrc;
static char* input_file_name = NULL;
static srslte_cell_sl_t cell = {.nof_prb = 6, .N_sl_id = 0, .tm = SRSLTE_SIDELINK_TM2, .cp = SRSLTE_CP_NORM};
static bool use_standard_lte_rates = false;
static uint32_t file_offset = 0;
static uint32_t sf_n_samples = 0;
static uint32_t sf_n_re = 0;
static cf_t* sf_buffer = NULL;
static cf_t* equalized_sf_buffer = NULL;
static cf_t* input_buffer = NULL;
static srslte_sci_t sci = {};
static srslte_pscch_t pscch = {};
static srslte_chest_sl_t pscch_chest = {};
static srslte_ofdm_t fft = {};
static srslte_sl_comm_resource_pool_t sl_comm_resource_pool = {};
static uint32_t size_sub_channel = 10;
static uint32_t num_sub_channel = 5;
static srslte_chest_sl_cfg_t pscch_chest_sl_cfg = {};
static srslte_filesource_t fsrc = {};
void usage(char* prog)
{
@ -88,13 +88,13 @@ void parse_args(int argc, char** argv)
input_file_name = argv[optind];
break;
case 's':
size_sub_channel = (int32_t)strtol(argv[optind], NULL, 10);
size_sub_channel = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'n':
num_sub_channel = (int32_t)strtol(argv[optind], NULL, 10);
num_sub_channel = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'p':
cell.nof_prb = (int32_t)strtol(argv[optind], NULL, 10);
cell.nof_prb = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 't':
switch ((int32_t)strtol(argv[optind], NULL, 10)) {

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