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Code Issues Releases Wiki Activity

fix Gal. E5a

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This commit is contained in:
Antonio Ramos
2018-02-08 17:52:46 +01:00
parent f52d46f608
commit 61f197e9b8
2 changed files with 19 additions and 28 deletions
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28
src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.cc
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@@ -255,9 +255,8 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items __attribut
Gnss_Synchro* out = reinterpret_cast<Gnss_Synchro*>(output_items[0]); // Get the output buffer pointer Gnss_Synchro* out = reinterpret_cast<Gnss_Synchro*>(output_items[0]); // Get the output buffer pointer
const Gnss_Synchro* in = reinterpret_cast<const Gnss_Synchro*>(input_items[0]); // Get the input buffer pointer const Gnss_Synchro* in = reinterpret_cast<const Gnss_Synchro*>(input_items[0]); // Get the input buffer pointer
Gnss_Synchro current_sample; //structure to save the synchronization information and send the output object to the next block
//1. Copy the current tracking output //1. Copy the current tracking output
current_sample = in[0]; Gnss_Synchro current_sample = in[0];
d_symbol_counter++; d_symbol_counter++;
if(flag_bit_start) if(flag_bit_start)
{ {
@@ -368,14 +367,8 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items __attribut
// 0. fetch the symbols into an array // 0. fetch the symbols into an array
int frame_length = GALILEO_FNAV_SYMBOLS_PER_PAGE - GALILEO_FNAV_PREAMBLE_LENGTH_BITS; int frame_length = GALILEO_FNAV_SYMBOLS_PER_PAGE - GALILEO_FNAV_PREAMBLE_LENGTH_BITS;
double corr_sign = 0.0; double corr_sign = 0.0;
if(corr_value > 0) if(corr_value > 0) { corr_sign = -1.0; }
{ else { corr_sign = 1.0; }
corr_sign = -1.0;
}
else
{
corr_sign = 1.0;
}
for (int i = 0; i < frame_length; i++) for (int i = 0; i < frame_length; i++)
{ {
page_symbols[i] = corr_sign * d_symbol_history.at(i + GALILEO_FNAV_PREAMBLE_LENGTH_BITS).Prompt_I; // because last symbol of the preamble is just received now! page_symbols[i] = corr_sign * d_symbol_history.at(i + GALILEO_FNAV_PREAMBLE_LENGTH_BITS).Prompt_I; // because last symbol of the preamble is just received now!
@@ -457,7 +450,7 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items __attribut
current_sample.Flag_valid_word = false; current_sample.Flag_valid_word = false;
} }
current_sample.TOW_at_current_symbol_s = floor(d_TOW_at_current_symbol*1000.0)/1000.0; current_sample.TOW_at_current_symbol_s = floor(d_TOW_at_current_symbol * 1000.0) / 1000.0;
if(d_dump) if(d_dump)
{ {
@@ -479,13 +472,14 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items __attribut
} }
} }
// remove used symbols from history // remove used symbols from history
while (d_symbol_history.size() > required_symbols) while (d_symbol_history.size() > required_symbols) { d_symbol_history.pop_front(); }
{
d_symbol_history.pop_front();
}
//3. Make the output //3. Make the output
out[0] = current_sample; if(current_sample.Flag_valid_word)
return 1; {
out[0] = current_sample;
return 1;
}
else { return 0; }
} }

19
src/algorithms/tracking/gnuradio_blocks/galileo_e5a_dll_pll_tracking_cc.cc
View File

@@ -445,9 +445,8 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items __attribute
current_synchro_data.Carrier_phase_rads = 0.0; current_synchro_data.Carrier_phase_rads = 0.0;
current_synchro_data.CN0_dB_hz = 0.0; current_synchro_data.CN0_dB_hz = 0.0;
current_synchro_data.fs = d_fs_in; current_synchro_data.fs = d_fs_in;
*out[0] = current_synchro_data;
consume_each(samples_offset); //shift input to perform alignment with local replica consume_each(samples_offset); //shift input to perform alignment with local replica
return 1; return 0;
break; break;
} }
case 2: case 2:
@@ -649,6 +648,7 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items __attribute
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad; current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz; current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz; current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_symbol_output = true;
} }
else else
{ {
@@ -658,6 +658,7 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items __attribute
current_synchro_data.Tracking_sample_counter = d_sample_counter; current_synchro_data.Tracking_sample_counter = d_sample_counter;
current_synchro_data.Carrier_phase_rads = 0.0; current_synchro_data.Carrier_phase_rads = 0.0;
current_synchro_data.CN0_dB_hz = 0.0; current_synchro_data.CN0_dB_hz = 0.0;
current_synchro_data.Flag_valid_symbol_output = false;
} }
break; break;
@@ -666,7 +667,7 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items __attribute
current_synchro_data.fs = d_fs_in; current_synchro_data.fs = d_fs_in;
current_synchro_data.correlation_length_ms = GALILEO_E5a_CODE_PERIOD_MS; current_synchro_data.correlation_length_ms = GALILEO_E5a_CODE_PERIOD_MS;
*out[0] = current_synchro_data; if(current_synchro_data.Flag_valid_symbol_output) { *out[0] = current_synchro_data; }
if(d_dump) if(d_dump)
{ {
@@ -731,15 +732,11 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items __attribute
} }
d_secondary_delay = (d_secondary_delay + 1) % Galileo_E5a_Q_SECONDARY_CODE_LENGTH; d_secondary_delay = (d_secondary_delay + 1) % Galileo_E5a_Q_SECONDARY_CODE_LENGTH;
d_sample_counter += d_current_prn_length_samples; //count for the processed samples d_sample_counter += d_current_prn_length_samples;
consume_each(d_current_prn_length_samples); // this is necessary in gr::block derivates consume_each(d_current_prn_length_samples);
if (current_synchro_data.Flag_valid_symbol_output) if(current_synchro_data.Flag_valid_symbol_output) { return 1; }
{ else { return 0; }
return 1;
}else{
return 0;
}
} }