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https://github.com/gnss-sdr/gnss-sdr
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78 lines
2.9 KiB
Matlab
78 lines
2.9 KiB
Matlab
% Reads GNSS-SDR Tracking dump binary file using the provided
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% function and plots some internal variables
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% Javier Arribas, 2011. jarribas(at)cttc.es
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% -------------------------------------------------------------------------
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%
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% GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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% This file is part of GNSS-SDR.
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%
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% Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
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% SPDX-License-Identifier: GPL-3.0-or-later
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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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if ~exist('dll_pll_veml_read_tracking_dump.m', 'file')
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addpath('./libs')
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end
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samplingFreq = 6625000; %[Hz]
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channels = 8;
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first_channel = 0;
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code_period = 0.001;
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path = '/archive/'; %% CHANGE THIS PATH
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figpath = [path];
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for N=1:1:channels
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tracking_log_path = [path 'epl_tracking_ch_' num2str(N+first_channel-1) '.dat']; %% CHANGE epl_tracking_ch_ BY YOUR dump_filename
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GNSS_tracking(N) = gps_l1_ca_kf_read_tracking_dump(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).carrFreqRate = GNSS_tracking(N).carrier_dopplerrate_hz2.';
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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 = GNSS_tracking(N).PRN.';
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trackResults(N).CNo = GNSS_tracking(N).CN0_SNV_dB_Hz.';
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kalmanResults(N).PRN = GNSS_tracking(N).PRN.';
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kalmanResults(N).innovation = GNSS_tracking(N).carr_error.';
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kalmanResults(N).state1 = GNSS_tracking(N).carr_nco.';
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kalmanResults(N).state2 = GNSS_tracking(N).carrier_doppler_hz.';
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kalmanResults(N).state3 = GNSS_tracking(N).carrier_dopplerrate_hz2.';
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kalmanResults(N).r_noise_cov = GNSS_tracking(N).carr_noise_sigma2.';
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kalmanResults(N).CNo = GNSS_tracking(N).CN0_SNV_dB_Hz.';
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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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settings.codePeriod = code_period;
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settings.timeStartInSeconds = 20;
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%plotTracking(N, trackResults, settings)
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plotKalman(N, kalmanResults, settings)
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saveas(gcf, [figpath 'epl_tracking_ch_' num2str(N) '_PRN_' num2str(trackResults(N).PRN(end)) '.png'], 'png')
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end
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