mirror of https://github.com/pvnis/srsRAN_4G.git
Changed matlab tests names
ismagom
10 years ago
parent
d6797964a5
commit
10ce33d47d
@ -0,0 +1,157 @@
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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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* libLTE 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 Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser 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 "liblte/phy/phy.h"
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#include "liblte/mex/mexutils.h"
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/** MEX function to be called from MATLAB to test the channel estimator
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*/
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#define ENBCFG prhs[0]
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#define INPUT 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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("[cfi] = liblte_pdcch(enbConfig, rxWaveform)\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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int i;
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lte_cell_t cell;
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pcfich_t pcfich;
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chest_dl_t chest;
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lte_fft_t fft;
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regs_t regs;
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uint32_t sf_idx;
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cf_t *input_fft, *input_signal;
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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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if (mexutils_read_cell(ENBCFG, &cell)) {
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help();
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return;
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}
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if (mexutils_read_uint32_struct(ENBCFG, "NSubframe", &sf_idx)) {
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help();
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return;
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}
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if (chest_dl_init(&chest, cell)) {
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fprintf(stderr, "Error initializing equalizer\n");
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return;
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}
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if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
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fprintf(stderr, "Error initializing FFT\n");
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return;
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}
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if (regs_init(®s, cell)) {
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mexErrMsgTxt("Error initiating regs\n");
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return;
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}
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if (pcfich_init(&pcfich, ®s, cell)) {
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fprintf(stderr, "Error creating PBCH object\n");
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return;
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}
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/** Allocate input buffers */
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if (mexutils_read_cf(INPUT, &input_signal) < 0) {
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mexErrMsgTxt("Error reading input signal\n");
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return;
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}
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input_fft = vec_malloc(SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
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// Set Channel estimates to 1.0 (ignore fading)
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cf_t *ce[MAX_PORTS];
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for (i=0;i<cell.nof_ports;i++) {
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ce[i] = vec_malloc(SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
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}
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lte_fft_run_sf(&fft, input_signal, input_fft);
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if (nrhs > NOF_INPUTS) {
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cf_t *cearray;
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mexutils_read_cf(prhs[NOF_INPUTS], &cearray);
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for (i=0;i<cell.nof_ports;i++) {
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for (int j=0;j<SF_LEN_RE(cell.nof_prb, cell.cp);j++) {
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ce[i][j] = *cearray;
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cearray++;
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}
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}
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} else {
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chest_dl_estimate(&chest, input_fft, ce, sf_idx);
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}
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float noise_power;
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if (nrhs > NOF_INPUTS + 1) {
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noise_power = mxGetScalar(prhs[NOF_INPUTS+1]);
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} else {
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noise_power = chest_dl_get_noise_estimate(&chest);
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}
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uint32_t cfi, distance;
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int n = pcfich_decode(&pcfich, input_fft, ce, noise_power, sf_idx, &cfi, &distance);
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if (nlhs >= 1) {
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if (n < 0) {
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plhs[0] = mxCreateDoubleScalar(-1);
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} else {
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plhs[0] = mxCreateDoubleScalar(cfi);
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}
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}
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if (nlhs >= 2) {
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mexutils_write_cf(pcfich.pcfich_d, &plhs[1], 16, 1);
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}
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if (nlhs >= 3) {
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mexutils_write_cf(pcfich.pcfich_symbols[0], &plhs[2], 16, 1);
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}
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chest_dl_free(&chest);
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lte_fft_free(&fft);
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pcfich_free(&pcfich);
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regs_free(®s);
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for (i=0;i<cell.nof_ports;i++) {
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free(ce[i]);
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}
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free(input_signal);
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free(input_fft);
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return;
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}
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@ -0,0 +1,104 @@
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%clear
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% R.1 10 MHz 1 port
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% R.10 10 MHz 2 ports
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% R.4 1.4 MHz 1 port
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% R.11-2 5 MHz 2 ports
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rmc = lteRMCDL('R.10');
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NofPortsTx=2;
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SNR_values_db=linspace(-8,-2,4);
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Nrealizations=200;
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enb = struct('NCellID',0,'NDLRB',50,'CellRefP',NofPortsTx,'CyclicPrefix','Normal','DuplexMode','FDD','NSubframe',0);
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griddims = lteResourceGridSize(enb); % Resource grid dimensions
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L = griddims(2);
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cfg.Seed = 8; % Random channel seed
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cfg.NRxAnts = 1; % 1 receive antenna
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cfg.DelayProfile = 'EPA'; % EVA delay spread
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cfg.DopplerFreq = 5; % 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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cec.PilotAverage = 'UserDefined'; % Type of pilot averaging
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cec.FreqWindow = 9; % Frequency window size
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cec.TimeWindow = 9; % Time window size
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cec.InterpType = 'linear'; % 2D interpolation type
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cec.InterpWindow = 'Centered'; % Interpolation window type
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cec.InterpWinSize = 1; % Interpolation window size
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rmc.PDSCH.Modulation = '16QAM';
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[waveform,rgrid,info] = lteRMCDLTool(rmc,[1;0;0;1]);
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cfg.SamplingRate = info.SamplingRate;
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addpath('../../debug/lte/phy/lib/phch/test')
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error=zeros(length(SNR_values_db),2);
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for snr_idx=1:length(SNR_values_db)
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SNRdB = SNR_values_db(snr_idx); % Desired SNR in dB
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SNR = 10^(SNRdB/20); % Linear SNR
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errorReal = zeros(Nrealizations,2);
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for i=1:Nrealizations
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rxWaveform = lteFadingChannel(cfg,sum(waveform,2));
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%% Additive Noise
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N0 = 1/(sqrt(2.0*double(enb.CellRefP)*double(info.Nfft))*SNR);
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% Create additive white Gaussian noise
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noise = N0*complex(randn(size(rxWaveform)),randn(size(rxWaveform)));
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rxWaveform = noise + rxWaveform;
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% rxWaveform = downsampled;
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% Number of OFDM symbols in a subframe
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% OFDM demodulate signal
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rxgrid = lteOFDMDemodulate(enb, rxWaveform);
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% Perform channel estimation
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[hest, nest] = lteDLChannelEstimate(enb, cec, rxgrid(:,1:L,:));
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pbchIndices = ltePBCHIndices(enb);
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[pbchRx, pbchHest] = lteExtractResources( ...
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pbchIndices, rxgrid(:,1:L,:), hest(:,1:L,:,:));
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% Decode PBCH
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[bchBits, pbchSymbols, nfmod4, mib, nof_ports] = ltePBCHDecode(enb, pbchRx, pbchHest, nest);
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if (nof_ports ~= NofPortsTx)
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errorReal(i,1)=1;
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end
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[nof_ports2, pbchSymbols2, pbchBits, ce, ce2, pbchRx2, pbchHest2,indices]= liblte_pbch(enb, rxWaveform, hest, nest);
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if (nof_ports2 ~= NofPortsTx)
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errorReal(i,2)=1;
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end
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% if (errorReal(i,1) ~= errorReal(i,2))
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% i=1;
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% end
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end
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error(snr_idx,:) = sum(errorReal);
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fprintf('SNR: %.2f dB\n', SNR_values_db(snr_idx));
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end
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if (length(SNR_values_db) > 1)
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semilogy(SNR_values_db, error/Nrealizations)
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grid on
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xlabel('SNR (dB)');
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ylabel('BLER')
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legend('Matlab','libLTE')
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axis([min(SNR_values_db) max(SNR_values_db) 1/Nrealizations/10 1])
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else
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disp(error)
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end
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@ -0,0 +1,171 @@
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%% PDCCH Blind Search and DCI Decoding + PCFICH encoding/decoding
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%% Cell-Wide Settings
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% A structure |enbConfig| is used to configure the eNodeB.
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clear
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Npackets = 1000;
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SNR_values = linspace(-0.5,3,6);
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txCFI = 3;
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enbConfig.NDLRB = 15; % No of Downlink RBs in total BW
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enbConfig.CyclicPrefix = 'Normal'; % CP length
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enbConfig.CFI = txCFI; ; % 4 PDCCH symbols as NDLRB <= 10
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enbConfig.Ng = 'Sixth'; % HICH groups
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enbConfig.CellRefP = 1; % 1-antenna ports
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enbConfig.NCellID = 0; % Physical layer cell identity
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enbConfig.NSubframe = 5; % Subframe number 0
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enbConfig.DuplexMode = 'FDD'; % Frame structure
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enbConfig.PHICHDuration = 'Normal';
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C_RNTI = 65535; % 16-bit UE-specific mask
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%% Setup Fading channel model
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cfg.Seed = 8; % Random channel seed
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cfg.NRxAnts = 1; % 1 receive antenna
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cfg.DelayProfile = 'EPA'; % EVA delay spread
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cfg.DopplerFreq = 5; % 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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% Setup channel equalizer
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cec.PilotAverage = 'UserDefined'; % Type of pilot averaging
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cec.FreqWindow = 9; % Frequency window size
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cec.TimeWindow = 9; % Time window size
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cec.InterpType = 'linear'; % 2D interpolation type
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cec.InterpWindow = 'Centered'; % Interpolation window type
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cec.InterpWinSize = 1; % Interpolation window size
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%% DCI Message Generation
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% Generate a DCI message to be mapped to the PDCCH.
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dciConfig.DCIFormat = 'Format1A'; % DCI message format
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dciConfig.Allocation.RIV = 26; % Resource indication value
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% Create DCI message for given configuration
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[dciMessage, dciMessageBits] = lteDCI(enbConfig, dciConfig);
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%% DCI Channel Coding
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pdcchConfig.RNTI = C_RNTI; % Radio network temporary identifier
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pdcchConfig.PDCCHFormat = 3; % PDCCH format
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ueConfig.RNTI = C_RNTI;
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% DCI message bits coding to form coded DCI bits
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codedDciBits = lteDCIEncode(pdcchConfig, dciMessageBits);
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%% PDCCH Bits Generation
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pdcchDims = ltePDCCHInfo(enbConfig);
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% Initialize elements with -1 to indicate that all the bits are unused
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pdcchBits = -1*ones(pdcchDims.MTot, 1);
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% Perform search space for UE-specific control channel candidates.
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candidates = ltePDCCHSpace(enbConfig, pdcchConfig, {'bits', '1based'});
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Ncad=randi(length(candidates),1,1);
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% Map PDCCH payload on available UE-specific candidate. In this example the
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% first available candidate is used to map the coded DCI bits.
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pdcchBits ( candidates(Ncad, 1) : candidates(Ncad, 2) ) = codedDciBits;
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%% PDCCH Complex-Valued Modulated Symbol Generation
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pdcchSymbols = ltePDCCH(enbConfig, pdcchBits);
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pdcchIndices = ltePDCCHIndices(enbConfig,{'1based'});
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subframe_tx = lteDLResourceGrid(enbConfig);
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subframe_tx(pdcchIndices) = pdcchSymbols;
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%% PCFICH
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cfiCodeword = lteCFI(enbConfig);
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pcfichSymbols = ltePCFICH(enbConfig,cfiCodeword);
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pcfichIndices = ltePCFICHIndices(enbConfig,'1based');
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subframe_tx(pcfichIndices) = pcfichSymbols;
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%% Add references
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cellRsSym = lteCellRS(enbConfig);
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cellRsInd = lteCellRSIndices(enbConfig);
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subframe_tx(cellRsInd) = cellRsSym;
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[txWaveform, info] = lteOFDMModulate(enbConfig,subframe_tx);
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cfg.SamplingRate = info.SamplingRate;
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addpath('../../debug/lte/phy/lib/phch/test')
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decoded = zeros(size(SNR_values));
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decoded_cfi = zeros(size(SNR_values));
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decoded_liblte = zeros(size(SNR_values));
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decoded_cfi_liblte = zeros(size(SNR_values));
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parfor snr_idx=1:length(SNR_values)
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SNRdB = SNR_values(snr_idx);
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SNR = 10^(SNRdB/10); % Linear SNR
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N0 = 1/(sqrt(2.0*enbConfig.CellRefP*double(info.Nfft))*SNR);
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for i=1:Npackets
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enbConfigRx=enbConfig;
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rxWaveform = sum(txWaveform,2);
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%% Fading
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rxWaveform = lteFadingChannel(cfg,rxWaveform);
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%% Noise Addition
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noise = N0*complex(randn(size(rxWaveform)), randn(size(rxWaveform))); % Generate noise
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rxWaveform = rxWaveform + noise;
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%% Demodulate
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subframe_rx = lteOFDMDemodulate(enbConfigRx, rxWaveform);
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% Perform channel estimation
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[hest, nest] = lteDLChannelEstimate(enbConfigRx, cec, subframe_rx);
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[pcfichSymbolsRx, pdcfichSymbolsHest] = lteExtractResources(pcfichIndices(:,1), subframe_rx, hest);
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%% PCFICH decoding
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[pcfichBits, pcfichSymbols] = ltePCFICHDecode(enbConfigRx,pcfichSymbolsRx, pdcfichSymbolsHest, nest);
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rxCFI = lteCFIDecode(pcfichBits);
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decoded_cfi(snr_idx) = decoded_cfi(snr_idx) + (rxCFI == txCFI);
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%% PDCCH Decoding
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enbConfigRx.CFI = rxCFI;
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pdcchIndicesRx = ltePDCCHIndices(enbConfigRx,{'1based'});
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[pdcchSymbolsRx, pdcchSymbolsHest] = lteExtractResources(pdcchIndicesRx(:,1), subframe_rx, hest);
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[recPdcchBits] = ltePDCCHDecode(enbConfigRx, pdcchSymbolsRx, pdcchSymbolsHest, nest);
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%% Blind Decoding using DCI Search
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[rxDCI, rxDCIBits] = ltePDCCHSearch(enbConfigRx, ueConfig, recPdcchBits);
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decoded(snr_idx) = decoded(snr_idx) + (length(rxDCI)>0);
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%% Same with libLTE
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[rxCFI, pcfichSymbols2, pcfichSymbolsRx2] = liblte_pcfich(enbConfigRx, rxWaveform);
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decoded_cfi_liblte(snr_idx) = decoded_cfi_liblte(snr_idx) + (rxCFI == txCFI);
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enbConfigRx.CFI = rxCFI;
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[found_liblte, llr, pdcchSymbols2] = liblte_pdcch(enbConfigRx, ueConfig.RNTI, rxWaveform);
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decoded_liblte(snr_idx) = decoded_liblte(snr_idx)+found_liblte;
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end
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fprintf('SNR: %.1f\n',SNRdB)
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end
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if (Npackets>1)
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semilogy(SNR_values,1-decoded/Npackets,'bo-',...
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SNR_values,1-decoded_cfi/Npackets,'bx:',...
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SNR_values,1-decoded_liblte/Npackets, 'ro-',...
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SNR_values,1-decoded_cfi_liblte/Npackets,'rx:')
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grid on
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legend('Matlab all','Matlab cfi', 'libLTE all', 'libLTE cfi')
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xlabel('SNR (dB)')
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ylabel('BLER')
|
||||
axis([min(SNR_values) max(SNR_values) 1/Npackets/10 1])
|
||||
else
|
||||
disp(decoded)
|
||||
disp(decoded_liblte)
|
||||
end
|
||||
|
||||
@ -0,0 +1,76 @@
|
||||
filename='../../debug/dist_ra.dat';
|
||||
|
||||
enb.NDLRB = 50;
|
||||
enb.CyclicPrefix = 'Normal';
|
||||
enb.PHICHDuration = 'Normal';
|
||||
enb.CFI = 2;
|
||||
enb.Ng = 'Sixth';
|
||||
enb.CellRefP = 1;
|
||||
enb.NCellID = 196;
|
||||
enb.NSubframe = 5;
|
||||
enb.NTotalSubframes=1;
|
||||
enb.DuplexMode = 'FDD';
|
||||
|
||||
dci.NDLRB = enb.NDLRB;
|
||||
dci.DCIFormat = 'Format1C';
|
||||
dci.AllocationType=1;
|
||||
%dci.Allocation.Bitmap='01111000011110000';
|
||||
%dci.Allocation.Subset=3;
|
||||
dci.Allocation.RIV = 33;
|
||||
dci.Allocation.Gap = 0;
|
||||
dci.ModCoding=6;
|
||||
dci.RV=0;
|
||||
dci.DuplexMode = enb.DuplexMode;
|
||||
dci.NTxAnts = enb.CellRefP;
|
||||
pdcch.RNTI = 65535;
|
||||
pdcch.PDCCHFormat = 3;
|
||||
|
||||
pdsch.Modulation='QPSK';
|
||||
pdsch.RNTI=pdcch.RNTI;
|
||||
if (enb.CellRefP == 1)
|
||||
pdsch.TxScheme='Port0';
|
||||
else
|
||||
pdsch.TxScheme='TxDiversity';
|
||||
end
|
||||
pdsch.NLayers=enb.CellRefP;
|
||||
pdsch.trblklen=176;
|
||||
pdsch.RV=dci.RV;
|
||||
|
||||
% Begin frame generation
|
||||
subframe = lteDLResourceGrid(enb);
|
||||
|
||||
%%% Create Reference Signals
|
||||
rsAnt = lteCellRS(enb);
|
||||
indAnt = lteCellRSIndices(enb);
|
||||
subframe(indAnt) = rsAnt;
|
||||
|
||||
%%% Create PDCCH
|
||||
[dciMessage,dciMessageBits] = lteDCI(enb,dci);
|
||||
codedDciBits = lteDCIEncode(pdcch,dciMessageBits);
|
||||
pdcchInfo = ltePDCCHInfo(enb);
|
||||
pdcchBits = -1*ones(1,pdcchInfo.MTot);
|
||||
candidates = ltePDCCHSpace(enb,pdcch,{'bits','1based'});
|
||||
pdcchBits (candidates(1,1):candidates(1,2)) = codedDciBits;
|
||||
pdcchSymbols = ltePDCCH(enb, pdcchBits);
|
||||
pdcchIndices = ltePDCCHIndices(enb,{'1based'});
|
||||
subframe(pdcchIndices) = pdcchSymbols;
|
||||
|
||||
% Create PDSCH
|
||||
pdsch.prbset = lteDCIResourceAllocation(enb,dci);
|
||||
|
||||
[pdschIndices,pdschInfo] = ltePDSCHIndices(enb,pdsch,pdsch.prbset);
|
||||
|
||||
dlschTransportBlk=randi([0 1],pdsch.trblklen,1);
|
||||
pdschcodeword = lteDLSCH(enb,pdsch,pdschInfo.G,dlschTransportBlk);
|
||||
%crced = lteCRCEncode(dlschTransportBlk, '24A');
|
||||
%encoded = lteTurboEncode(crced);
|
||||
%pdschcodeword2 = lteRateMatchTurbo(encoded,pdschInfo.G,pdsch.RV);
|
||||
pdschSymbols = ltePDSCH(enb,pdsch,pdschcodeword);
|
||||
|
||||
subframe(pdschIndices) = pdschSymbols;
|
||||
|
||||
txwaveform = lteOFDMModulate(enb,subframe);
|
||||
|
||||
write_complex(filename,sum(txwaveform,2));
|
||||
fprintf('Written signal to %s\n',filename);
|
||||
|
||||
@ -0,0 +1,144 @@
|
||||
|
||||
SNR_values = linspace(-6,4,10);
|
||||
Npackets = 200;
|
||||
CFO=4/15;
|
||||
m0=7;
|
||||
m1=10;
|
||||
%m0=26;
|
||||
%m1=21;
|
||||
|
||||
recordedWaveform = x;
|
||||
if (~isempty(recordedWaveform))
|
||||
Npackets = floor(length(recordedWaveform)/19200)-1;
|
||||
SNR_values = 0;
|
||||
end
|
||||
|
||||
error = zeros(6,length(SNR_values));
|
||||
|
||||
enb = struct('NCellID',2,'NSubframe',0,'NDLRB',6,'CellRefP',1,'CyclicPrefix','Normal','DuplexMode','FDD');
|
||||
sss=lteSSS(enb);
|
||||
|
||||
cfg.Seed = 2; % Random channel seed
|
||||
cfg.NRxAnts = 1; % 1 receive antenna
|
||||
cfg.DelayProfile = 'ETU'; % EVA delay spread
|
||||
cfg.DopplerFreq = 144; % 120Hz Doppler frequency
|
||||
cfg.MIMOCorrelation = 'Low'; % Low (no) MIMO correlation
|
||||
cfg.NTerms = 16; % Oscillators used in fading model
|
||||
cfg.ModelType = 'GMEDS'; % Rayleigh fading model type
|
||||
cfg.InitPhase = 'Random'; % Random initial phases
|
||||
cfg.NormalizePathGains = 'On'; % Normalize delay profile power
|
||||
cfg.NormalizeTxAnts = 'On'; % Normalize for transmit antennas % Initialize at time zero
|
||||
|
||||
[s, c0, c1] = get_sc(mod(enb.NCellID,3));
|
||||
|
||||
subframe = lteDLResourceGrid(enb);
|
||||
sssSym = lteSSS(enb);
|
||||
sssInd = lteSSSIndices(enb);
|
||||
subframe(sssInd) = sssSym;
|
||||
N_id_1 = floor(enb.NCellID/3);
|
||||
|
||||
[txWaveform,info] = lteOFDMModulate(enb,subframe);
|
||||
cfg.SamplingRate = info.SamplingRate;
|
||||
fftSize = info.Nfft;
|
||||
|
||||
|
||||
addpath('../../debug/lte/phy/lib/sync/test')
|
||||
|
||||
for snr_idx=1:length(SNR_values)
|
||||
SNRdB = SNR_values(snr_idx);
|
||||
for i=1:Npackets
|
||||
%% Noise Addition
|
||||
SNR = 10^(SNRdB/10); % Linear SNR
|
||||
|
||||
if (isempty(recordedWaveform))
|
||||
cfg.InitTime = i*(10^-3);
|
||||
[rxWaveform, info]= lteFadingChannel(cfg,txWaveform);
|
||||
rxWaveform = txWaveform;
|
||||
|
||||
% Add CFO
|
||||
freq = CFO/double(fftSize);
|
||||
rxWaveform = rxWaveform.*exp(1i*2*pi*freq*(1:length(txWaveform))');
|
||||
|
||||
N0 = 1/(sqrt(2.0*enb.CellRefP*double(fftSize))*SNR);
|
||||
noise = N0*complex(randn(size(rxWaveform)), randn(size(rxWaveform))); % Generate noise
|
||||
|
||||
rxWaveform = rxWaveform + noise;
|
||||
else
|
||||
rxWaveform = recordedWaveform(i*19200+1:(i+1)*19200);
|
||||
end
|
||||
|
||||
offset = lteDLFrameOffset(enb,rxWaveform);
|
||||
offsetVec(i)=offset;
|
||||
rxWaveform = [rxWaveform(1+offset:end,:); zeros(offset,1)];
|
||||
|
||||
subframe_rx = lteOFDMDemodulate(enb,rxWaveform,1);
|
||||
|
||||
sss_rx = subframe_rx(lteSSSIndices(enb));
|
||||
sss0=sss_rx(1:2:end);
|
||||
sss1=sss_rx(2:2:end);
|
||||
|
||||
beta0=sss0.*c0';
|
||||
beta1=sss1.*c1';
|
||||
|
||||
corr0=zeros(31,1);
|
||||
for m=1:31
|
||||
corr0(m)=sum(beta0.*s(m,:)');
|
||||
end
|
||||
corr0=abs(corr0).^2;
|
||||
[m, idx]=max(corr0);
|
||||
|
||||
error(1,snr_idx) = error(1,snr_idx) + ((idx ~= m0 && idx ~= m1));
|
||||
|
||||
M=2;
|
||||
Nm=10;
|
||||
|
||||
corr2=zeros(31,1);
|
||||
for m=1:31
|
||||
for j=0:M
|
||||
idx=1+j*Nm:(j+1)*Nm;
|
||||
corr2(m)=corr2(m)+abs(sum(beta0(idx).*s(m,idx)')).^2;
|
||||
end
|
||||
end
|
||||
[m, idx]=max(corr2);
|
||||
|
||||
error(2,snr_idx) = error(2,snr_idx) + ((idx ~= m0 && idx ~= m1));
|
||||
|
||||
corr3=zeros(31,1);
|
||||
for m=1:31
|
||||
corr3(m)=abs(sum(beta0(2:end).*conj(beta0(1:end-1)).*transpose(s(m,2:end).*conj(s(m,1:end-1))))).^2;
|
||||
end
|
||||
[m, idx]=max(corr3);
|
||||
|
||||
error(3,snr_idx) = error(3,snr_idx) + ((idx ~= m0 && idx ~= m1));
|
||||
|
||||
% libLTE results
|
||||
[n,sf_idx,lt_corr0]=liblte_sss(enb,rxWaveform,'full');
|
||||
[m, idx]=max(lt_corr0);
|
||||
error(4,snr_idx) = error(4,snr_idx) + ((idx ~= m0 && idx ~= m1));
|
||||
|
||||
[n,sf_idx,lt_corr2]=liblte_sss(enb,rxWaveform,'partial');
|
||||
[m, idx]=max(lt_corr2);
|
||||
error(5,snr_idx) = error(5,snr_idx) + ((idx ~= m0 && idx ~= m1));
|
||||
|
||||
[n,sf_idx,lt_corr3]=liblte_sss(enb,rxWaveform,'diff');
|
||||
[m, idx]=max(lt_corr3);
|
||||
error(6,snr_idx) = error(6,snr_idx) + ((idx ~= m0 && idx ~= m1));
|
||||
|
||||
end
|
||||
end
|
||||
|
||||
if (length(SNR_values) > 1)
|
||||
plot(SNR_values,1-error/Npackets)
|
||||
legend('Full','Partial','Differential','Full-lt','Partial-lt','Differential-lt')
|
||||
grid on
|
||||
else
|
||||
e=error/Npackets;
|
||||
fprintf('Full (mt/lt): \t%f/%f\n',e(1),e(4));
|
||||
fprintf('Partial (mt/lt):%f/%f\n',e(2),e(5));
|
||||
fprintf('Diff (mt/lt): \t%f/%f\n',e(3),e(6));
|
||||
end
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@ -0,0 +1,49 @@
|
||||
|
||||
clear
|
||||
blen=40;
|
||||
SNR_values_db=linspace(-6,4,8);
|
||||
Nrealizations=5000;
|
||||
|
||||
addpath('../../debug/lte/phy/lib/fec/test')
|
||||
|
||||
errors1=zeros(1,length(SNR_values_db));
|
||||
errors2=zeros(1,length(SNR_values_db));
|
||||
for snr_idx=1:length(SNR_values_db)
|
||||
SNRdB = SNR_values_db(snr_idx); % Desired SNR in dB
|
||||
SNR = 10^(SNRdB/20); % Linear SNR
|
||||
|
||||
for i=1:Nrealizations
|
||||
Data = randi(2,blen,1)==1;
|
||||
codedData = lteConvolutionalEncode(Data);
|
||||
|
||||
codedsymbols = 2*double(codedData)-1;
|
||||
|
||||
%% Additive Noise
|
||||
N0 = 1/SNR;
|
||||
|
||||
% Create additive white Gaussian noise
|
||||
noise = N0*randn(size(codedsymbols));
|
||||
|
||||
noisysymbols = noise + codedsymbols;
|
||||
|
||||
decodedData = lteConvolutionalDecode(noisysymbols);
|
||||
interleavedSymbols = reshape(reshape(noisysymbols,[],3)',1,[]);
|
||||
[decodedData2, quant] = liblte_viterbi(interleavedSymbols);
|
||||
|
||||
errors1(snr_idx) = errors1(snr_idx) + any(decodedData ~= Data);
|
||||
errors2(snr_idx) = errors2(snr_idx) + any(decodedData2 ~= Data);
|
||||
end
|
||||
end
|
||||
|
||||
if (length(SNR_values_db) > 1)
|
||||
semilogy(SNR_values_db, errors1/Nrealizations, ...
|
||||
SNR_values_db, errors2/Nrealizations)
|
||||
grid on
|
||||
xlabel('SNR (dB)')
|
||||
ylabel('BLER')
|
||||
legend('Matlab','libLTE');
|
||||
else
|
||||
disp(errors1);
|
||||
disp(errors2);
|
||||
disp(errors3);
|
||||
end
|
||||
Loading…
Reference in New Issue