mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-10-29 22:26:22 +00:00
81 lines
3.5 KiB
Matlab
81 lines
3.5 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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% Antonio Ramos, 2018. antonio.ramos(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 = 3000000; %[Hz]
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plot_last_outputs=0;%1000;
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channels = 1; % Number of channels
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first_channel = 0; % Number of the first channel
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path = '/home/javier/git/gnss-sdr/install/test_inta/'; %% CHANGE THIS PATH
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for N=1:1:channels
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tracking_log_path = [path 'tracking_ch_' num2str(N+first_channel-1) '.dat']; %% CHANGE track_ch_ BY YOUR dump_filename
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GNSS_tracking(N) = dll_pll_veml_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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if plot_last_outputs>0 && plot_last_outputs<length(GNSS_tracking(N).code_freq_hz)
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start_sample=length(GNSS_tracking(N).code_freq_hz)-plot_last_outputs;
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else
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start_sample=1;
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end
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trackResults(N).codeFreq = GNSS_tracking(N).code_freq_hz(start_sample:end).';
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trackResults(N).carrFreq = GNSS_tracking(N).carrier_doppler_hz(start_sample:end).';
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trackResults(N).dllDiscr = GNSS_tracking(N).code_error(start_sample:end).';
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trackResults(N).dllDiscrFilt = GNSS_tracking(N).code_nco(start_sample:end).';
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trackResults(N).pllDiscr = GNSS_tracking(N).carr_error(start_sample:end).';
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trackResults(N).pllDiscrFilt = GNSS_tracking(N).carr_nco(start_sample:end).';
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trackResults(N).I_P = GNSS_tracking(N).P(start_sample:end).';
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trackResults(N).Q_P = zeros(1,length(GNSS_tracking(N).P(start_sample:end)));
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trackResults(N).I_VE = GNSS_tracking(N).VE(start_sample:end).';
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trackResults(N).I_E = GNSS_tracking(N).E(start_sample:end).';
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trackResults(N).I_L = GNSS_tracking(N).L(start_sample:end).';
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trackResults(N).I_VL = GNSS_tracking(N).VL(start_sample:end).';
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trackResults(N).Q_VE = zeros(1,length(GNSS_tracking(N).VE(start_sample:end)));
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trackResults(N).Q_E = zeros(1,length(GNSS_tracking(N).E(start_sample:end)));
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trackResults(N).Q_L = zeros(1,length(GNSS_tracking(N).L(start_sample:end)));
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trackResults(N).Q_VL = zeros(1,length(GNSS_tracking(N).VL(start_sample:end)));
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trackResults(N).data_I = GNSS_tracking(N).prompt_I(start_sample:end).';
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trackResults(N).data_Q = GNSS_tracking(N).prompt_Q(start_sample:end).';
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trackResults(N).PRN = GNSS_tracking(N).PRN(start_sample:end).';
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trackResults(N).CNo = GNSS_tracking(N).CN0_SNV_dB_Hz(start_sample:end).';
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trackResults(N).prn_start_time_s = GNSS_tracking(N).PRN_start_sample(start_sample:end)/samplingFreq;
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% Use original MATLAB tracking plot function
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settings.numberOfChannels = channels;
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plotVEMLTracking(N, trackResults, settings)
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end
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%Doppler plot (optional)
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% for N=1:1:channels
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% figure;
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% plot(trackResults(N).prn_start_time_s , GNSS_tracking(N).carrier_doppler_hz(start_sample:end).' / 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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