mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2025-11-23 02:24:53 +00:00
Code Issues Releases Wiki Activity

final version

Browse Source
This commit is contained in:
marc-sales
2014-08-20 10:59:47 +02:00
parent 3b3c809dab
commit 1d3d40cefd
22 changed files with 412 additions and 285 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.cc
View File

@@ -1,7 +1,12 @@
/*!
* \file galileo_e5a_telemetry_decoder_cc.cc
* \brief Implementation of a Galileo FNAV message demodulator block
* \author Marc Sales 2014. marcsales92(at)gmail.com
* \author Marc Sales, 2014. marcsales92(at)gmail.com
* \based on work from:
* <ul>
* <li> Javier Arribas, 2011. jarribas(at)cttc.es
* </ul>
*
*
* -------------------------------------------------------------------------
*
@@ -246,7 +251,7 @@ galileo_e5a_telemetry_decoder_cc::galileo_e5a_telemetry_decoder_cc(
d_preamble_index = 0;
d_preamble_time_seconds = 0;
d_flag_frame_sync = false;
d_current_symbol_float = 0;
d_current_symbol = 0;
d_prompt_counter = 0;
d_symbol_counter = 0;
@@ -254,6 +259,7 @@ galileo_e5a_telemetry_decoder_cc::galileo_e5a_telemetry_decoder_cc(
d_TOW_at_current_symbol = 0;
d_CRC_error_counter = 0;
d_sign_init = 0;
}
galileo_e5a_telemetry_decoder_cc::~galileo_e5a_telemetry_decoder_cc()
@@ -282,10 +288,10 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
{
if (in[0][0].Prompt_I != 0)
{
d_current_symbol_float += (float)in[0][0].Prompt_I;
d_current_symbol += in[0][0].Prompt_I;
if (d_prompt_counter == GALILEO_FNAV_CODES_PER_SYMBOL - 1)
{
if (d_current_symbol_float > 0)
if (d_current_symbol > 0)
{
d_page_symbols[d_symbol_counter] = 1;
}
@@ -293,7 +299,7 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
{
d_page_symbols[d_symbol_counter] = -1;
}
d_current_symbol_float = 0;
d_current_symbol = 0;
d_symbol_counter++;
d_prompt_counter = 0;
if (d_symbol_counter == GALILEO_FNAV_PREAMBLE_LENGTH_BITS-1)
@@ -310,10 +316,10 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
}
case 1:
{
d_current_symbol_float += (float)in[0][0].Prompt_I;
d_current_symbol += in[0][0].Prompt_I;
if (d_prompt_counter == GALILEO_FNAV_CODES_PER_SYMBOL - 1)
{
if (d_current_symbol_float > 0)
if (d_current_symbol > 0)
{
d_page_symbols[d_symbol_counter] = 1;
}
@@ -322,7 +328,7 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
d_page_symbols[d_symbol_counter] = -1;
}
// d_page_symbols[d_symbol_counter] = d_current_symbol_float/(float)GALILEO_FNAV_CODES_PER_SYMBOL;
d_current_symbol_float = 0;
d_current_symbol = 0;
d_symbol_counter++;
d_prompt_counter = 0;
// **** Attempt Preamble correlation ****
@@ -384,10 +390,10 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
}
case 2:
{
d_current_symbol_float += (float)in[0][0].Prompt_I;
d_current_symbol += in[0][0].Prompt_I;
if (d_prompt_counter == GALILEO_FNAV_CODES_PER_SYMBOL - 1)
{
if (d_current_symbol_float > 0)
if (d_current_symbol > 0)
{
d_page_symbols[d_symbol_counter] = 1;
}
@@ -396,7 +402,7 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
d_page_symbols[d_symbol_counter] = -1;
}
// d_page_symbols[d_symbol_counter] = d_current_symbol_float/(float)GALILEO_FNAV_CODES_PER_SYMBOL;
d_current_symbol_float = 0;
d_current_symbol = 0;
d_symbol_counter++;
d_prompt_counter = 0;
// At the right sample stamp, check preamble synchro
@@ -444,15 +450,6 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
if (corr_flag==true) // NEW PREAMBLE RECEIVED. DECODE PAGE
{
d_preamble_index = d_sample_counter - GALILEO_FNAV_CODES_PER_PREAMBLE;//record the preamble sample stamp
// Change sign if necessary
// if (corr_sign < 0)
// {
// // NOTE: exists volk library for integers ???
// for (int i = 0; i < d_symbol_counter; i++)
// {
// d_page_symbols[i] = -d_page_symbols[i];
// }
// }
// DECODE WORD
decode_word(d_page_symbols, GALILEO_FNAV_SYMBOLS_PER_PAGE - GALILEO_FNAV_PREAMBLE_LENGTH_BITS);
// CHECK CRC

10
src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.h
View File

@@ -1,7 +1,12 @@
/*!
* \file galileo_e5a_telemetry_decoder_cc.cc
* \brief Implementation of a Galileo FNAV message demodulator block
* \author Marc Sales 2014. marcsales92(at)gmail.com
* \author Marc Sales, 2014. marcsales92(at)gmail.com
* \based on work from:
* <ul>
* <li> Javier Arribas, 2011. jarribas(at)cttc.es
* </ul>
*
*
* -------------------------------------------------------------------------
*
@@ -100,9 +105,10 @@ private:
// signed int d_page_symbols[GALILEO_FNAV_SYMBOLS_PER_PAGE + GALILEO_FNAV_PREAMBLE_LENGTH_BITS];
double d_page_symbols[GALILEO_FNAV_SYMBOLS_PER_PAGE + GALILEO_FNAV_PREAMBLE_LENGTH_BITS];
signed int *d_preamble_symbols;
float d_current_symbol_float;
double d_current_symbol;
long unsigned int d_symbol_counter;
int d_prompt_counter;
int d_sign_init;
long unsigned int d_sample_counter;
long unsigned int d_preamble_index;