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srsLTE
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Changed CFO EMA coefficients

This commit is contained in:
ismagom 2016-04-17 13:13:48 +02:00
parent 837326f575
commit a625f30643
4 changed files with 12 additions and 9 deletions
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15
matlab/tests/pdsch_decode_signal.m
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@ -1,4 +1,4 @@
%enb=struct('NCellID',424,'NDLRB',100,'NSubframe',9,'CFI',2,'CyclicPrefix','Normal','CellRefP',2,'Ng','One','PHICHDuration','Normal','DuplexMode','FDD');
enb=struct('NCellID',1,'NDLRB',50,'NSubframe',2,'CFI',2,'CyclicPrefix','Normal','CellRefP',1,'Ng','One','PHICHDuration','Normal','DuplexMode','FDD');
RNTI=65535;
@ -11,8 +11,8 @@ cec.InterpType = 'linear'; % 2D interpolation type
cec.InterpWindow = 'Causal'; % Interpolation window type
cec.InterpWinSize = 1; % Interpolation window size
%subframe_rx=lteOFDMDemodulate(enb,inputSignal);
subframe_rx=reshape(input,[],14);
subframe_rx=lteOFDMDemodulate(enb,y);
%subframe_rx=reshape(input,[],14);
[hest,nest] = lteDLChannelEstimate(enb, cec, subframe_rx);
% Search PDCCH
@ -30,7 +30,8 @@ if ~isempty(dci)
% Get the PDSCH configuration from the DCI
[pdsch, trblklen] = hPDSCHConfiguration(enb, dci, pdcch.RNTI);
pdsch.NTurboDecIts = 10;
%pdsch.Modulation = {'QPSK'};
pdsch.Modulation = {'QPSK'};
pdsch.RV=0;
%trblklen=75376;
fprintf('PDSCH settings after DCI decoding:\n');
disp(pdsch);
@ -43,9 +44,9 @@ if ~isempty(dci)
[dlschBits,pdschSymbols] = ltePDSCHDecode(enb, pdsch, pdschRx, pdschHest, nest);
[sib1, crc] = lteDLSCHDecode(enb, pdsch, trblklen, dlschBits);
[dec2, data, pdschRx2, pdschSymbols2, e_bits] = srslte_pdsch(enb, pdsch, ...
trblklen, ...
subframe_rx, hest, nest);
%[dec2, data, pdschRx2, pdschSymbols2, e_bits] = srslte_pdsch(enb, pdsch, ...
% trblklen, ...
% subframe_rx, hest, nest);
scatter(real(pdschSymbols{1}),imag(pdschSymbols{1}))

1
srslte/examples/pdsch_ue.c
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@ -506,6 +506,7 @@ int main(int argc, char **argv) {
// RV for SIB1 is predefined
uint32_t k = (sfn/2)%4;
uint32_t rv = ((uint32_t) ceilf((float)1.5*k))%4;
n = srslte_ue_dl_decode_rnti_rv(&ue_dl, &sf_buffer[prog_args.time_offset], data,
srslte_ue_sync_get_sfidx(&ue_sync),
SRSLTE_SIRNTI, rv);

1
srslte/lib/ue/src/ue_dl.c
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@ -449,6 +449,7 @@ bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t n_pr
void srslte_ue_dl_save_signal(srslte_ue_dl_t *q, srslte_softbuffer_rx_t *softbuffer, uint32_t tti, uint32_t rv_idx) {
srslte_vec_save_file("sf_symbols", q->sf_symbols, SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
printf("%d samples\n", SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp));
srslte_vec_save_file("ce0", q->ce[0], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
if (q->cell.nof_ports > 1) {
srslte_vec_save_file("ce1", q->ce[1], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));

4
srslte/lib/ue/src/ue_sync.c
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@ -194,8 +194,8 @@ int srslte_ue_sync_init(srslte_ue_sync_t *q,
srslte_sync_cfo_i_detec_en(&q->sfind, false);
srslte_sync_set_cfo_ema_alpha(&q->sfind, 0.01);
srslte_sync_set_cfo_ema_alpha(&q->strack, 0.01);
srslte_sync_set_cfo_ema_alpha(&q->sfind, 0.1);
srslte_sync_set_cfo_ema_alpha(&q->strack, 0.1);
/* In find phase and if the cell is known, do not average pss correlation
* because we only capture 1 subframe and do not know where the peak is.