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srsLTE
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SRSUE: set SNR threshold for MIB decoding

This commit is contained in:
Xavier Arteaga 2020-03-26 19:55:00 +01:00 committed by Xavier Arteaga
parent 6d355ab61e
commit e9813375eb
2 changed files with 14 additions and 1 deletions
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2
srsue/hdr/phy/sync.h
View File

@ -122,6 +122,7 @@ private:
sfn_sync() = default;
~sfn_sync();
void init(srslte_ue_sync_t* ue_sync,
const phy_args_t* phy_args_,
srslte::rf_buffer_t& buffer,
uint32_t buffer_max_samples_,
srslte::log* log_h,
@ -141,6 +142,7 @@ private:
private:
const static int SFN_SYNC_NOF_SUBFRAMES = 100;
const phy_args_t* phy_args = nullptr;
uint32_t cnt = 0;
uint32_t timeout = 0;
srslte::log* log_h = nullptr;

13
srsue/src/phy/sync.cc
View File

@ -94,7 +94,7 @@ void sync::init(srslte::radio_interface_phy* _radio,
search_p.init(sf_buffer, log_h, nof_rf_channels, this);
// Initialize SFN synchronizer, it uses only pcell buffer
sfn_p.init(&ue_sync, sf_buffer, sf_buffer.size(), log_h);
sfn_p.init(&ue_sync, worker_com->args, sf_buffer, sf_buffer.size(), log_h);
// Start intra-frequency measurement
for (uint32_t i = 0; i < worker_com->args->nof_carriers; i++) {
@ -1061,6 +1061,7 @@ sync::sfn_sync::~sfn_sync()
}
void sync::sfn_sync::init(srslte_ue_sync_t* ue_sync_,
const phy_args_t* phy_args_,
srslte::rf_buffer_t& buffer,
uint32_t buffer_max_samples_,
srslte::log* log_h_,
@ -1068,6 +1069,7 @@ void sync::sfn_sync::init(srslte_ue_sync_t* ue_sync_,
{
log_h = log_h_;
ue_sync = ue_sync_;
phy_args = phy_args_;
timeout = nof_subframes;
mib_buffer = buffer;
@ -1158,6 +1160,15 @@ sync::sfn_sync::ret_code sync::sfn_sync::decode_mib(srslte_cell_t*
sfn = (sfn + sfn_offset) % 1024;
if (tti_cnt) {
*tti_cnt = 10 * sfn;
// Check if SNR is below the minimum threshold
if (ue_mib.chest_res.snr_db < phy_args->in_sync_snr_db_th) {
Info("SYNC: MIB decoded, SNR is too low (%+.1f < %+.1f)\n",
ue_mib.chest_res.snr_db,
phy_args->in_sync_snr_db_th);
return SFN_NOFOUND;
}
Info("SYNC: DONE, SNR=%.1f dB, TTI=%d, sfn_offset=%d\n", ue_mib.chest_res.snr_db, *tti_cnt, sfn_offset);
}