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https://github.com/gnss-sdr/gnss-sdr
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Added Matlab functions to analyze tracking results in 64 bits systems.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@233 64b25241-fba3-4117-9849-534c7e92360d
This commit is contained in:
Luis Esteve
parent
c6c5decf9c
commit
2bb7afc0ee
89
src/utils/matlab/gps_l1_ca_dll_pll_plot_sample_64bits.m
Normal file
89
src/utils/matlab/gps_l1_ca_dll_pll_plot_sample_64bits.m
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% /*!
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% * \file gps_l1_ca_dll_pll_plot_sample_64bits.m
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% * \brief Read GNSS-SDR Tracking dump binary file using the provided
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% function and plot some internal variables
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% * \author Javier Arribas, 2011. jarribas(at)cttc.es
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% * -------------------------------------------------------------------------
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% *
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% * Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
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% *
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% * GNSS-SDR is a software defined Global Navigation
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% * Satellite Systems receiver
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% *
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% * This file is part of GNSS-SDR.
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% *
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% * GNSS-SDR is free software: you can redistribute it and/or modify
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% * it under the terms of the GNU General Public License as published by
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% * the Free Software Foundation, either version 3 of the License, or
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% * at your option) any later version.
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% *
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% * GNSS-SDR 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 General Public License for more details.
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% *
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% * You should have received a copy of the GNU General Public License
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% * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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% *
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% * -------------------------------------------------------------------------
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% */
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close all;
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clear all;
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samplingFreq = 64e6/32; %[Hz]
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channels=1;
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%path='/home/javier/workspace/gnss-sdr/trunk/install/';
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path='/home/luis/dev/gnss-sdr/trunk/data/';
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clear PRN_absolute_sample_start;
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for N=1:1:channels
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tracking_log_path=[path 'tracking_ch_' num2str(N-1) '.dat'];
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GNSS_tracking(N)= gps_l1_ca_dll_pll_read_tracking_dump_64bits(tracking_log_path);
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end
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% GNSS-SDR format conversion to MATLAB GPS receiver
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for N=1:1:channels
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trackResults(N).status='T'; %fake track
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trackResults(N).codeFreq=GNSS_tracking(N).code_freq_hz.';
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trackResults(N).carrFreq=GNSS_tracking(N).carrier_doppler_hz.';
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trackResults(N).dllDiscr = GNSS_tracking(N).code_error.';
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trackResults(N).dllDiscrFilt = GNSS_tracking(N).code_nco.';
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trackResults(N).pllDiscr = GNSS_tracking(N).carr_error.';
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trackResults(N).pllDiscrFilt = GNSS_tracking(N).carr_nco.';
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trackResults(N).I_P=GNSS_tracking(N).prompt_I.';
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trackResults(N).Q_P=GNSS_tracking(N).prompt_Q.';
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trackResults(N).I_E= GNSS_tracking(N).E.';
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trackResults(N).I_L = GNSS_tracking(N).L.';
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trackResults(N).Q_E = zeros(1,length(GNSS_tracking(N).E));
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trackResults(N).Q_L =zeros(1,length(GNSS_tracking(N).E));
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trackResults(N).PRN=N; %fake PRN
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% Use original MATLAB tracking plot function
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settings.numberOfChannels=channels;
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settings.msToProcess=length(GNSS_tracking(N).E);
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plotTracking(N,trackResults,settings)
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end
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for N=1:1:channels
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% figure;
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% plot([GNSS_tracking(N).E,GNSS_tracking(N).P,GNSS_tracking(N).L],'-*');
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% title(['Early, Prompt, and Late correlator absolute value output for channel ' num2str(N)']);
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% figure;
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% plot(GNSS_tracking(N).prompt_I,GNSS_tracking(N).prompt_Q,'+');
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% title(['Navigation constellation plot for channel ' num2str(N)]);
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% figure;
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%
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% plot(GNSS_tracking(N).prompt_Q,'r');
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% hold on;
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% plot(GNSS_tracking(N).prompt_I);
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% title(['Navigation symbols I(red) Q(blue) for channel ' num2str(N)]);
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%
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figure;
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t=0:length(GNSS_tracking(N).carrier_doppler_hz)-1;
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t=t/1000;
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plot(t,GNSS_tracking(N).carrier_doppler_hz/1000);
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xlabel('Time(s)');ylabel('Doppler(KHz)');title(['Doppler frequency channel ' num2str(N)]);
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end
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@ -0,0 +1,179 @@
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% /*!
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% * \file gps_l1_ca_dll_pll_read_tracking_dump.m
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% * \brief Read GNSS-SDR Tracking dump binary file into MATLAB.
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% * \author Javier Arribas, 2011. jarribas(at)cttc.es
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% * -------------------------------------------------------------------------
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% *
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% * Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
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% *
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% * GNSS-SDR is a software defined Global Navigation
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% * Satellite Systems receiver
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% *
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% * This file is part of GNSS-SDR.
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% *
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% * GNSS-SDR is free software: you can redistribute it and/or modify
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% * it under the terms of the GNU General Public License as published by
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% * the Free Software Foundation, either version 3 of the License, or
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% * at your option) any later version.
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% *
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% * GNSS-SDR 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 General Public License for more details.
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% *
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% * You should have received a copy of the GNU General Public License
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% * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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% *
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% * -------------------------------------------------------------------------
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% */
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function [GNSS_tracking] = gps_l1_ca_dll_pll_read_tracking_dump_64bits (filename, count)
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%% usage: gps_l1_ca_dll_pll_read_tracking_dump_64bits (filename, [count])
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%%
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%% open GNSS-SDR tracking binary log file .dat and return the contents
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%%
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m = nargchk (1,2,nargin);
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num_float_vars=15;
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num_unsigned_long_int_vars=1;
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num_double_vars=1;
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double_size_bytes=8;
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unsigned_long_int_size_bytes=8;
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float_size_bytes=4;
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skip_bytes_each_read=float_size_bytes*num_float_vars+unsigned_long_int_size_bytes*num_unsigned_long_int_vars+double_size_bytes*num_double_vars;
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bytes_shift=0;
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if (m)
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usage (m);
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end
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if (nargin < 2)
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count = Inf;
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end
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%loops_counter = fread (f, count, 'uint32',4*12);
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f = fopen (filename, 'rb');
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if (f < 0)
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else
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v1 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v2 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v3 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v4 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v5 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v6 = fread (f, count, 'uint64',skip_bytes_each_read-unsigned_long_int_size_bytes);
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bytes_shift=bytes_shift+unsigned_long_int_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v7 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v8 = fread (f, count, '*float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v9 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v10 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v11 = fread (f, count, '*float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v12 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v13 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v14 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v15 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v16 = fread (f, count, 'float',skip_bytes_each_read-float_size_bytes);
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bytes_shift=bytes_shift+float_size_bytes;
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fseek(f,bytes_shift,'bof'); % move to next interleaved float
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v17 = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
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fclose (f);
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%%%%%%%% output vars %%%%%%%%
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% // EPR
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% d_dump_file.write((char*)&tmp_E, sizeof(float));
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% d_dump_file.write((char*)&tmp_P, sizeof(float));
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% d_dump_file.write((char*)&tmp_L, sizeof(float));
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% // PROMPT I and Q (to analyze navigation symbols)
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% d_dump_file.write((char*)&prompt_I, sizeof(float));
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% d_dump_file.write((char*)&prompt_Q, sizeof(float));
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% // PRN start sample stamp
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% //tmp_float=(float)d_sample_counter;
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% d_dump_file.write((char*)&d_sample_counter, sizeof(unsigned long int));
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% // accumulated carrier phase
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% d_dump_file.write((char*)&d_acc_carrier_phase_rad, sizeof(float));
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%
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% // carrier and code frequency
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% d_dump_file.write((char*)&d_carrier_doppler_hz, sizeof(float));
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% d_dump_file.write((char*)&d_code_freq_hz, sizeof(float));
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%
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% //PLL commands
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% d_dump_file.write((char*)&carr_error, sizeof(float));
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% d_dump_file.write((char*)&carr_nco, sizeof(float));
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%
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% //DLL commands
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% d_dump_file.write((char*)&code_error, sizeof(float));
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% d_dump_file.write((char*)&code_nco, sizeof(float));
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%
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% // CN0 and carrier lock test
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% d_dump_file.write((char*)&d_CN0_SNV_dB_Hz, sizeof(float));
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% d_dump_file.write((char*)&d_carrier_lock_test, sizeof(float));
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%
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% // AUX vars (for debug purposes)
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% tmp_float=0;
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% d_dump_file.write((char*)&tmp_float, sizeof(float));
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% d_dump_file.write((char*)&d_sample_counter_seconds, sizeof(double));
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E=v1;
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P=v2;
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L=v3;
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prompt_I=v4;
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prompt_Q=v5;
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PRN_start_sample=v6;
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acc_carrier_phase_rad=v7;
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carrier_doppler_hz=v8;
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code_freq_hz=v9;
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carr_error=v10;
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carr_nco=v11;
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code_error=v12;
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code_nco=v13;
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CN0_SNV_dB_Hz=v14;
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carrier_lock_test=v15;
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var1=v16;
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var2=v17;
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GNSS_tracking.E=E;
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GNSS_tracking.P=P;
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GNSS_tracking.L=L;
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GNSS_tracking.prompt_I=prompt_I;
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GNSS_tracking.prompt_Q=prompt_Q;
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GNSS_tracking.PRN_start_sample=PRN_start_sample;
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GNSS_tracking.acc_carrier_phase_rad=acc_carrier_phase_rad;
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GNSS_tracking.carrier_doppler_hz=carrier_doppler_hz;
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GNSS_tracking.code_freq_hz=code_freq_hz;
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GNSS_tracking.carr_error=carr_error;
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GNSS_tracking.carr_nco=carr_nco;
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GNSS_tracking.code_error=code_error;
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GNSS_tracking.code_nco=code_nco;
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GNSS_tracking.CN0_SNV_dB_Hz=CN0_SNV_dB_Hz;
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GNSS_tracking.carrier_lock_test=carrier_lock_test;
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GNSS_tracking.var1=var1;
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GNSS_tracking.var2=var2;
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end
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