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srsLTE
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pcfich: fixed incorrect detection

This commit is contained in:
Ismael Gomez 2016-05-18 11:51:10 +02:00
parent 82d55bde4f
commit e9d242f6b4
4 changed files with 12 additions and 10 deletions
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8
matlab/tests/pdcch_bler.m
View File

@ -11,7 +11,7 @@ SNR_values = linspace(2,6,6);
txCFI = 3;
enbConfig.NDLRB = 15; % No of Downlink RBs in total BW
enbConfig.CyclicPrefix = 'Normal'; % CP length
enbConfig.CFI = txCFI; ; % 4 PDCCH symbols as NDLRB <= 10
enbConfig.CFI = txCFI; % 4 PDCCH symbols as NDLRB <= 10
enbConfig.Ng = 'One'; % HICH groups
enbConfig.CellRefP = 1; % 1-antenna ports
enbConfig.NCellID = 0; % Physical layer cell identity
@ -23,7 +23,7 @@ C_RNTI = 1; % 16-bit UE-specific mask
%% Setup Fading channel model
cfg.Seed = 8; % Random channel seed
cfg.NRxAnts = 1; % 1 receive antenna
cfg.DelayProfile = 'EVA'; % EVA delay spread
cfg.DelayProfile = 'EPA'; % EVA delay spread
cfg.DopplerFreq = 5; % 120Hz Doppler frequency
cfg.MIMOCorrelation = 'Low'; % Low (no) MIMO correlation
cfg.InitTime = 0; % Initialize at time zero
@ -56,7 +56,7 @@ dciConfig.Allocation.RIV = 26; % Resource indication value
if C_RNTI<65535
pdcchConfig.RNTI = C_RNTI; % Radio network temporary identifier
end
pdcchConfig.PDCCHFormat = 0; % PDCCH format
pdcchConfig.PDCCHFormat = 3; % PDCCH format
ueConfig.RNTI = C_RNTI;
candidates = ltePDCCHSpace(enbConfig, pdcchConfig, {'bits', '1based'});
@ -153,7 +153,7 @@ for snr_idx=1:length(SNR_values)
%% Same with srsLTE
[rxCFI_srslte, pcfichRx2, pcfichSymbols2] = srslte_pcfich(enbConfigRx, subframe_rx);
decoded_cfi_srslte(snr_idx) = decoded_cfi_srslte(snr_idx) + (rxCFI_srslte == txCFI);
enbConfigRx.CFI = rxCFI;
enbConfigRx.CFI = txCFI;
[found_srslte, pdcchBits2, pdcchRx2, pdcchSymbols2, hest2] = srslte_pdcch(enbConfigRx, ueConfig.RNTI, subframe_rx, hest, nest);
decoded_srslte(snr_idx) = decoded_srslte(snr_idx)+found_srslte;
end

4
srslte/examples/pdsch_ue.c
View File

@ -546,7 +546,7 @@ int main(int argc, char **argv) {
#endif
}
nof_trials++;
rsrq = SRSLTE_VEC_EMA(srslte_chest_dl_get_rsrq(&ue_dl.chest), rsrq, 0.1);
@ -585,7 +585,7 @@ int main(int argc, char **argv) {
sfn++;
if (sfn == 1024) {
sfn = 0;
printf("reset\n");
printf("\n");
ue_dl.pkt_errors = 0;
ue_dl.pkts_total = 0;
ue_dl.nof_detected = 0;

2
srslte/lib/fec/viterbi.c
View File

@ -40,7 +40,7 @@
#define TB_ITER 3
#define DEFAULT_GAIN 16
#define DEFAULT_GAIN 20
//#undef LV_HAVE_SSE

8
srslte/lib/phch/pcfich.c
View File

@ -117,14 +117,16 @@ float srslte_pcfich_cfi_decode(srslte_pcfich_t *q, uint32_t *cfi) {
int i;
int index = 0;
float max_corr = 0;
float corr[3];
for (i = 0; i < 3; i++) {
float corr = fabsf(srslte_vec_dot_prod_fff(q->cfi_table_float[i], q->data_f, PCFICH_CFI_LEN));
if (corr > max_corr) {
max_corr = corr;
corr[i] = srslte_vec_dot_prod_fff(q->cfi_table_float[i], q->data_f, PCFICH_CFI_LEN);
if (corr[i] > max_corr) {
max_corr = corr[i];
index = i;
}
}
if (cfi) {
*cfi = index + 1;
}