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srsLTE
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Fix PBCH encoding and added unit test

This commit is contained in:
Xavier Arteaga 2021-10-07 11:09:27 +02:00
parent 25bd0d6219
commit 52e00d6376
5 changed files with 68 additions and 15 deletions
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8
lib/src/phy/phch/pbch_nr.c
View File

@ -410,9 +410,11 @@ static void pbch_nr_scramble_tx(const srsran_pbch_nr_cfg_t* cfg,
uint32_t M_bit = PBCH_NR_E;
// Select value v
uint32_t v = (ssb_idx & 0x7U);
// for L max = 8 or L max = 64 , & is the three least significant bits of the SS/PBCH block index
uint32_t v = (ssb_idx & 0b111U);
if (cfg->Lmax == 4) {
v = ssb_idx & 0x3U;
// for L max = 4 , & is the two least significant bits of the SS/PBCH block index
v = ssb_idx & 0b11U;
}
// Advance sequence
@ -435,8 +437,10 @@ static void pbch_nr_scramble_rx(const srsran_pbch_nr_cfg_t* cfg,
uint32_t M_bit = PBCH_NR_E;
// Select value v
// for L max = 8 or L max = 64 , & is the three least significant bits of the SS/PBCH block index
uint32_t v = (ssb_idx & 0b111U);
if (cfg->Lmax == 4) {
// for L max = 4 , & is the two least significant bits of the SS/PBCH block index
v = ssb_idx & 0b11U;
}

6
lib/src/phy/sync/ssb.c
View File

@ -558,10 +558,11 @@ int srsran_ssb_add(srsran_ssb_t* q, uint32_t N_id, const srsran_pbch_msg_nr_t* m
// Put PBCH DMRS
srsran_dmrs_pbch_cfg_t pbch_dmrs_cfg = {};
pbch_dmrs_cfg.N_id = N_id;
pbch_dmrs_cfg.n_hf = msg->hrf ? 0 : 1;
pbch_dmrs_cfg.n_hf = msg->hrf ? 1 : 0;
pbch_dmrs_cfg.ssb_idx = msg->ssb_idx;
pbch_dmrs_cfg.L_max = q->Lmax;
pbch_dmrs_cfg.beta = 0.0f;
pbch_dmrs_cfg.scs = q->cfg.scs;
if (srsran_dmrs_pbch_put(&pbch_dmrs_cfg, ssb_grid) < SRSRAN_SUCCESS) {
ERROR("Error putting PBCH DMRS");
return SRSRAN_ERROR;
@ -570,7 +571,10 @@ int srsran_ssb_add(srsran_ssb_t* q, uint32_t N_id, const srsran_pbch_msg_nr_t* m
// Put PBCH payload
srsran_pbch_nr_cfg_t pbch_cfg = {};
pbch_cfg.N_id = N_id;
pbch_cfg.n_hf = msg->hrf;
pbch_cfg.ssb_idx = msg->ssb_idx;
pbch_cfg.Lmax = q->Lmax;
pbch_cfg.beta = 0.0f;
if (srsran_pbch_nr_encode(&q->pbch, &pbch_cfg, msg, ssb_grid) < SRSRAN_SUCCESS) {
ERROR("Error encoding PBCH");
return SRSRAN_ERROR;

22
lib/src/phy/sync/test/CMakeLists.txt
View File

@ -137,11 +137,25 @@ target_link_libraries(ssb_decode_test srsran_phy)
foreach (SSB_SCS 15 30)
# For each supported Cell/Carrier subcarrier spacing
foreach (CELL_SCS 15 30)
# Test SSB measurements
add_nr_test(ssb_measure_test_${SSB_SCS}_${CELL_SCS} ssb_measure_test -s ${SSB_SCS} -S ${CELL_SCS})
# For 1.0 GHz and 3.5 GHz Center frequencies
foreach (CELL_FREQ 1000000000 3500000000)
# For SSB centered at -960, 0 and 960 kHz from the center frequency
foreach (SSB_OFFSET_FREQ -960000 0 960000)
# For patterns A, B, C
foreach (SSB_PATTERN A B C)
# Calculate Actual SSB center frequency
math(EXPR SSB_FREQ "${CELL_FREQ} + ${SSB_OFFSET_FREQ}")
# Test SSB PBCH decoding
add_nr_test(ssb_decode_test_${SSB_SCS}_${CELL_SCS} ssb_decode_test -s ${SSB_SCS} -S ${CELL_SCS})
# Test SSB measurements
add_nr_test(ssb_measure_test_${CELL_FREQ}_${CELL_SCS}_${SSB_FREQ}_${SSB_SCS}_${SSB_PATTERN} ssb_measure_test
-F ${CELL_FREQ} -S ${CELL_SCS} -f ${SSB_FREQ} -s ${SSB_SCS})
# Test SSB PBCH decoding
add_nr_test(ssb_decode_test_${CELL_FREQ}_${CELL_SCS}_${SSB_FREQ}_${SSB_SCS}_${SSB_PATTERN} ssb_decode_test
-F ${CELL_FREQ} -S ${CELL_SCS} -f ${SSB_FREQ} -s ${SSB_SCS})
endforeach ()
endforeach ()
endforeach ()
endforeach ()
endforeach ()

23
lib/src/phy/sync/test/ssb_decode_test.c
View File

@ -23,7 +23,10 @@
// NR parameters
static uint32_t carrier_nof_prb = 52;
static srsran_subcarrier_spacing_t carrier_scs = srsran_subcarrier_spacing_15kHz;
static double carrier_freq_hz = 3.5e9 + 960e3;
static srsran_subcarrier_spacing_t ssb_scs = srsran_subcarrier_spacing_30kHz;
static double ssb_freq_hz = 3.5e9;
static srsran_ssb_patern_t ssb_pattern = SRSRAN_SSB_PATTERN_A;
// Channel parameters
static cf_t wideband_gain = 1.0f + 0.5 * I;
@ -42,14 +45,17 @@ static void usage(char* prog)
{
printf("Usage: %s [v]\n", prog);
printf("\t-s SSB subcarrier spacing [default, %s kHz]\n", srsran_subcarrier_spacing_to_str(ssb_scs));
printf("\t-f SSB center frequency [default, %.3f MHz]\n", ssb_freq_hz / 1e6);
printf("\t-S cell/carrier subcarrier spacing [default, %s kHz]\n", srsran_subcarrier_spacing_to_str(carrier_scs));
printf("\t-F cell/carrier center frequency in Hz [default, %.3f MHz]\n", carrier_freq_hz / 1e6);
printf("\t-P SSB pattern [default, %s]\n", srsran_ssb_pattern_to_str(ssb_pattern));
printf("\t-v [set srsran_verbose to debug, default none]\n");
}
static void parse_args(int argc, char** argv)
{
int opt;
while ((opt = getopt(argc, argv, "Ssv")) != -1) {
while ((opt = getopt(argc, argv, "SsFfv")) != -1) {
switch (opt) {
case 's':
ssb_scs = srsran_subcarrier_spacing_from_str(argv[optind]);
@ -58,6 +64,9 @@ static void parse_args(int argc, char** argv)
exit(-1);
}
break;
case 'f':
ssb_freq_hz = strtod(argv[optind], NULL);
break;
case 'S':
carrier_scs = srsran_subcarrier_spacing_from_str(argv[optind]);
if (carrier_scs == srsran_subcarrier_spacing_invalid) {
@ -65,6 +74,12 @@ static void parse_args(int argc, char** argv)
exit(-1);
}
break;
case 'F':
carrier_freq_hz = strtod(argv[optind], NULL);
break;
case 'P':
ssb_pattern = srsran_ssb_pattern_fom_str(argv[optind]);
break;
case 'v':
srsran_verbose++;
break;
@ -114,10 +129,10 @@ static int test_case_1(srsran_ssb_t* ssb)
// SSB configuration
srsran_ssb_cfg_t ssb_cfg = {};
ssb_cfg.srate_hz = srate_hz;
ssb_cfg.center_freq_hz = 3.5e9;
ssb_cfg.ssb_freq_hz = 3.5e9 - 960e3;
ssb_cfg.center_freq_hz = carrier_freq_hz;
ssb_cfg.ssb_freq_hz = ssb_freq_hz;
ssb_cfg.scs = ssb_scs;
ssb_cfg.pattern = SRSRAN_SSB_PATTERN_C;
ssb_cfg.pattern = ssb_pattern;
TESTASSERT(srsran_ssb_set_cfg(ssb, &ssb_cfg) == SRSRAN_SUCCESS);

24
lib/src/phy/sync/test/ssb_measure_test.c
View File

@ -21,7 +21,10 @@
// NR parameters
static uint32_t carrier_nof_prb = 52;
static srsran_subcarrier_spacing_t carrier_scs = srsran_subcarrier_spacing_15kHz;
static double carrier_freq_hz = 3.5e9 + 960e3;
static srsran_subcarrier_spacing_t ssb_scs = srsran_subcarrier_spacing_30kHz;
static double ssb_freq_hz = 3.5e9;
static srsran_ssb_patern_t ssb_pattern = SRSRAN_SSB_PATTERN_A;
// Channel parameters
static int32_t delay_n = 1;
@ -46,14 +49,18 @@ static void usage(char* prog)
{
printf("Usage: %s [v]\n", prog);
printf("\t-s SSB subcarrier spacing [default, %s kHz]\n", srsran_subcarrier_spacing_to_str(ssb_scs));
printf("\t-f SSB center frequency [default, %.3f MHz]\n", ssb_freq_hz / 1e6);
printf("\t-S cell/carrier subcarrier spacing [default, %s kHz]\n", srsran_subcarrier_spacing_to_str(carrier_scs));
printf("\t-F cell/carrier center frequency in Hz [default, %.3f MHz]\n", carrier_freq_hz / 1e6);
printf("\t-P SSB pattern [default, %s]\n", srsran_ssb_pattern_to_str(ssb_pattern));
printf("\t-v [set srsran_verbose to debug, default none]\n");
}
static void parse_args(int argc, char** argv)
{
int opt;
while ((opt = getopt(argc, argv, "Ssv")) != -1) {
while ((opt = getopt(argc, argv, "SsFfv")) != -1) {
switch (opt) {
case 's':
ssb_scs = srsran_subcarrier_spacing_from_str(argv[optind]);
@ -62,6 +69,9 @@ static void parse_args(int argc, char** argv)
exit(-1);
}
break;
case 'f':
ssb_freq_hz = strtod(argv[optind], NULL);
break;
case 'S':
carrier_scs = srsran_subcarrier_spacing_from_str(argv[optind]);
if (carrier_scs == srsran_subcarrier_spacing_invalid) {
@ -69,6 +79,12 @@ static void parse_args(int argc, char** argv)
exit(-1);
}
break;
case 'F':
carrier_freq_hz = strtod(argv[optind], NULL);
break;
case 'P':
ssb_pattern = srsran_ssb_pattern_fom_str(argv[optind]);
break;
case 'v':
srsran_verbose++;
break;
@ -114,10 +130,10 @@ static int test_case_1(srsran_ssb_t* ssb)
// SSB configuration
srsran_ssb_cfg_t ssb_cfg = {};
ssb_cfg.srate_hz = srate_hz;
ssb_cfg.center_freq_hz = 3.5e9;
ssb_cfg.ssb_freq_hz = 3.5e9 - 960e3;
ssb_cfg.center_freq_hz = carrier_freq_hz;
ssb_cfg.ssb_freq_hz = ssb_freq_hz;
ssb_cfg.scs = ssb_scs;
ssb_cfg.pattern = SRSRAN_SSB_PATTERN_C;
ssb_cfg.pattern = ssb_pattern;
TESTASSERT(srsran_ssb_set_cfg(ssb, &ssb_cfg) == SRSRAN_SUCCESS);