2018-03-30 08:33:11 +00:00
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% -------------------------------------------------------------------------
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%
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% Copyright (C) 2010-2018 (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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2012-04-11 10:43:35 +00:00
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%help script to compare GNSS-SDR Preambles starts
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channel=3;
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% From GNSS_SDR telemetry decoder
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% 1 find preambles indexes
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preambles_index=find(GNSS_telemetry(channel).Preamble_symbol_counter==0);
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% 2 Get associated timestamp ms
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preambles_timestamp_sdr_ms=GNSS_telemetry(channel).prn_delay_ms(preambles_index);
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% From Matlab receiver
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[firstSubFrame, activeChnList, javi_subFrameStart_sample] = findPreambles(trackResults_sdr,settings);
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preambles_timestamp_matlab_ms=trackResults_sdr(channel).prn_delay_ms(javi_subFrameStart_sample(channel,1:6));
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%Compare
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common_start_index=max(find(abs(preambles_timestamp_sdr_ms-preambles_timestamp_matlab_ms(1))<2000));
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error_ms=preambles_timestamp_sdr_ms(common_start_index:(common_start_index+length(preambles_timestamp_matlab_ms)-1))-preambles_timestamp_matlab_ms.'
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% figure
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% stem(tracking_loop_start+javi_subFrameStart_sample(channel,:),1000*trackResults_sdr(channel).absoluteSample(javi_subFrameStart_sample(channel,:))/settings.samplingFreq);
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2018-03-30 08:33:11 +00:00
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%
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2012-04-11 10:43:35 +00:00
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% hold on;
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2018-03-30 08:33:11 +00:00
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%
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2012-04-11 10:43:35 +00:00
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% plot(GNSS_observables.preamble_delay_ms(channel,:));
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2018-03-30 08:33:11 +00:00
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%
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2012-04-11 10:43:35 +00:00
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% plot(GNSS_observables.prn_delay_ms(channel,:),'r')
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