mirror of https://github.com/pvnis/srsRAN_4G.git
Improved SFBC decoder and added SSE version. Fixed bug in MIB decoding. Improved calibration of synchronization constants
ismagom
9 years ago
parent
799af37bed
commit
c3268a93e2
@ -0,0 +1,46 @@
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clear
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addpath('../../build/srslte/lib/mimo/test')
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enb = lteRMCDL('R.10');
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cec = struct('FreqWindow',9,'TimeWindow',9,'InterpType','cubic');
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cec.PilotAverage = 'UserDefined';
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cec.InterpWinSize = 1;
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cec.InterpWindow = 'Causal';
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cfg.Seed = 1; % Random channel seed
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cfg.NRxAnts = 1; % 1 receive antenna
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cfg.DelayProfile = 'ETU'; % EVA delay spread
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cfg.DopplerFreq = 100; % 120Hz Doppler frequency
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cfg.MIMOCorrelation = 'Low'; % Low (no) MIMO correlation
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cfg.InitTime = 0; % Initialize at time zero
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cfg.NTerms = 16; % Oscillators used in fading model
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cfg.ModelType = 'GMEDS'; % Rayleigh fading model type
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cfg.InitPhase = 'Random'; % Random initial phases
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cfg.NormalizePathGains = 'On'; % Normalize delay profile power
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cfg.NormalizeTxAnts = 'On'; % Normalize for transmit antennas
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[txWaveform, ~, info] = lteRMCDLTool(enb,[1;0;0;1]);
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n = length(txWaveform);
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cfg.SamplingRate = info.SamplingRate;
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txWaveform = txWaveform+complex(randn(n,2),randn(n,2))*1e-3;
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rxWaveform = lteFadingChannel(cfg,txWaveform);
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rxGrid = lteOFDMDemodulate(enb,sum(rxWaveform,2));
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[h,n0] = lteDLChannelEstimate(enb,cec,rxGrid);
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signal=rxGrid(:,1);
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hest(:,1,1)=reshape(h(:,1,1,1),[],1);
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hest(:,1,2)=reshape(h(:,1,1,1),[],1);
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output_mat = lteTransmitDiversityDecode(signal(, hest(1:598,1,:));
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output_srs = srslte_diversitydecode(signal(1:598), hest(1:598,1,:));
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plot(abs(output_mat-output_srs))
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mean(abs(output_mat-output_srs).^2)
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@ -0,0 +1,116 @@
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include <string.h>
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#include "srslte/srslte.h"
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#include "srslte/mex/mexutils.h"
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/** MEX function to be called from MATLAB to test the predecoder
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*/
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#define INPUT prhs[0]
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#define HEST prhs[1]
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#define NOF_INPUTS 2
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void help()
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{
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mexErrMsgTxt
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("[output] = srslte_predecoder(input, hest, nest)\n\n");
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}
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/* the gateway function */
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void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
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{
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cf_t *input = NULL;
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cf_t *hest = NULL;
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cf_t *output = NULL;
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uint32_t nof_symbols = 0;
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if (nrhs < NOF_INPUTS) {
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help();
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return;
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}
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// Read input symbols
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nof_symbols = mexutils_read_cf(INPUT, &input);
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if (nof_symbols < 0) {
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mexErrMsgTxt("Error reading input\n");
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return;
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}
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// Read channel estimates
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uint32_t nof_symbols2 = mexutils_read_cf(HEST, &hest);
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if (nof_symbols < 0) {
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mexErrMsgTxt("Error reading hest\n");
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return;
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}
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if ((nof_symbols2 % nof_symbols) != 0) {
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mexErrMsgTxt("Hest size must be multiple of input size\n");
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return;
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}
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// Calculate number of ports
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uint32_t nof_ports = nof_symbols2/nof_symbols;
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cf_t *x[8];
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cf_t *h[4];
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/* Allocate memory */
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output = srslte_vec_malloc(sizeof(cf_t)*nof_symbols);
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int i;
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for (i = 0; i < nof_ports; i++) {
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x[i] = srslte_vec_malloc(sizeof(cf_t)*nof_symbols);
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h[i] = &hest[i*nof_symbols];
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}
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for (;i<8;i++) {
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x[i] = NULL;
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}
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for (i=nof_ports;i<4;i++) {
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h[i] = NULL;
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}
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srslte_predecoding_diversity(input, h, x, nof_ports, nof_symbols);
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srslte_layerdemap_diversity(x, output, nof_ports, nof_symbols / nof_ports);
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if (nlhs >= 1) {
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mexutils_write_cf(output, &plhs[0], nof_symbols, 1);
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}
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if (input) {
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free(input);
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}
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if (output) {
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free(output);
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}
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for (i=0;i<8;i++) {
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if (x[i]) {
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free(x[i]);
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}
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}
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return;
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}
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