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Modified GNU Radio Block for Galileo E5b

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This commit is contained in:
piyush0411 2020-07-25 02:56:54 +05:30
parent fa9abed435
commit e8f4eb7441
2 changed files with 76 additions and 12 deletions
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65
src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_telemetry_decoder_gs.cc
View File

@ -5,7 +5,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -21,6 +21,7 @@
#include "galileo_telemetry_decoder_gs.h"
#include "Galileo_E1.h" // for GALILEO_E1_CODE_PERIOD_MS
#include "Galileo_E5a.h" // for GALILEO_E5A_CODE_PERIO...
#include "Galileo_E5b.h" // for GALILEO_E5B_CODE_PERIOD_MS
#include "convolutional.h"
#include "display.h"
#include "galileo_almanac_helper.h" // for Galileo_Almanac_Helper
@ -48,6 +49,13 @@ galileo_make_telemetry_decoder_gs(const Gnss_Satellite &satellite, int frame_typ
return galileo_telemetry_decoder_gs_sptr(new galileo_telemetry_decoder_gs(satellite, frame_type, dump));
}
void galileo_telemetry_decoder_gs::set_signal_type(gr_vector_const_void_star &input_items)
{
const auto **in = reinterpret_cast<const Gnss_Synchro **>(&input_items[0]); // Get the input buffer pointer
Gnss_Synchro current_symbol{}; // structure to save the synchronization information and send the output object to the next block
current_symbol = in[0][0];
signal = current_symbol.Signal[0];
}
galileo_telemetry_decoder_gs::galileo_telemetry_decoder_gs(
const Gnss_Satellite &satellite, int frame_type,
@ -72,8 +80,15 @@ galileo_telemetry_decoder_gs::galileo_telemetry_decoder_gs(
switch (d_frame_type)
{
case 1: // INAV
{
if (signal == '1')
{
d_PRN_code_period_ms = static_cast<uint32_t>(GALILEO_E1_CODE_PERIOD_MS);
}
else if (signal == '7')
{
d_PRN_code_period_ms = static_cast<uint32_t>(GALILEO_E5B_CODE_PERIOD_MS * GALILEO_E5B_I_SECONDARY_CODE_LENGTH);
}
d_bits_per_preamble = GALILEO_INAV_PREAMBLE_LENGTH_BITS;
// set the preamble
d_samples_per_preamble = GALILEO_INAV_PREAMBLE_LENGTH_BITS;
@ -254,13 +269,27 @@ void galileo_telemetry_decoder_gs::decode_INAV_word(float *page_part_symbols, in
// DECODE COMPLETE WORD (even + odd) and TEST CRC
d_inav_nav.split_page(page_String, flag_even_word_arrived);
if (d_inav_nav.get_flag_CRC_test() == true)
{
if (signal == '1')
{
DLOG(INFO) << "Galileo E1 CRC correct in channel " << d_channel << " from satellite " << d_satellite;
}
else if (signal == '7')
{
DLOG(INFO) << "Galileo E5b CRC correct in channel " << d_channel << " from satellite " << d_satellite;
}
}
else
{
if (signal == '1')
{
DLOG(INFO) << "Galileo E1 CRC error in channel " << d_channel << " from satellite " << d_satellite;
}
else if (signal == '7')
{
DLOG(INFO) << "Galileo E5b CRC error in channel " << d_channel << " from satellite " << d_satellite;
}
}
flag_even_word_arrived = 0;
}
else
@ -275,21 +304,42 @@ void galileo_telemetry_decoder_gs::decode_INAV_word(float *page_part_symbols, in
{
// get object for this SV (mandatory)
const std::shared_ptr<Galileo_Ephemeris> tmp_obj = std::make_shared<Galileo_Ephemeris>(d_inav_nav.get_ephemeris());
if (signal == '1')
{
std::cout << "New Galileo E1 I/NAV message received in channel " << d_channel << ": ephemeris from satellite " << d_satellite << '\n';
}
else if (signal == '7')
{
std::cout << "New Galileo E5b I/NAV message received in channel " << d_channel << ": ephemeris from satellite " << d_satellite << '\n';
}
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
}
if (d_inav_nav.have_new_iono_and_GST() == true)
{
// get object for this SV (mandatory)
const std::shared_ptr<Galileo_Iono> tmp_obj = std::make_shared<Galileo_Iono>(d_inav_nav.get_iono());
if (signal == '1')
{
std::cout << "New Galileo E1 I/NAV message received in channel " << d_channel << ": iono/GST model parameters from satellite " << d_satellite << '\n';
}
else if (signal == '7')
{
std::cout << "New Galileo E5b I/NAV message received in channel " << d_channel << ": iono/GST model parameters from satellite " << d_satellite << '\n';
}
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
}
if (d_inav_nav.have_new_utc_model() == true)
{
// get object for this SV (mandatory)
const std::shared_ptr<Galileo_Utc_Model> tmp_obj = std::make_shared<Galileo_Utc_Model>(d_inav_nav.get_utc_model());
if (signal == '1')
{
std::cout << "New Galileo E1 I/NAV message received in channel " << d_channel << ": UTC model parameters from satellite " << d_satellite << '\n';
}
else if (signal == '7')
{
std::cout << "New Galileo E5b I/NAV message received in channel " << d_channel << ": UTC model parameters from satellite " << d_satellite << '\n';
}
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
d_delta_t = tmp_obj->A_0G_10 + tmp_obj->A_1G_10 * (static_cast<double>(d_TOW_at_current_symbol_ms) / 1000.0 - tmp_obj->t_0G_10 + 604800 * (std::fmod(static_cast<float>(d_inav_nav.get_Galileo_week() - tmp_obj->WN_0G_10), 64.0)));
DLOG(INFO) << "delta_t=" << d_delta_t << "[s]";
@ -299,7 +349,14 @@ void galileo_telemetry_decoder_gs::decode_INAV_word(float *page_part_symbols, in
const std::shared_ptr<Galileo_Almanac_Helper> tmp_obj = std::make_shared<Galileo_Almanac_Helper>(d_inav_nav.get_almanac());
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
// debug
if (signal == '1')
{
std::cout << "Galileo E1 I/NAV almanac received in channel " << d_channel << " from satellite " << d_satellite << '\n';
}
else if (signal == '7')
{
std::cout << "Galileo E5b I/NAV almanac received in channel " << d_channel << " from satellite " << d_satellite << '\n';
}
DLOG(INFO) << "Current parameters:";
DLOG(INFO) << "d_TOW_at_current_symbol_ms=" << d_TOW_at_current_symbol_ms;
DLOG(INFO) << "d_nav.WN_0=" << d_inav_nav.get_Galileo_week();
@ -642,7 +699,7 @@ int galileo_telemetry_decoder_gs::general_work(int noutput_items __attribute__((
{
// TOW_5 refers to the even preamble, but when we decode it we are in the odd part, so 1 second later plus the decoding delay
d_TOW_at_Preamble_ms = static_cast<uint32_t>(d_inav_nav.get_TOW5() * 1000.0);
d_TOW_at_current_symbol_ms = d_TOW_at_Preamble_ms + static_cast<uint32_t>(GALILEO_INAV_PAGE_PART_MS + (d_required_symbols + 1) * GALILEO_E1_CODE_PERIOD_MS);
d_TOW_at_current_symbol_ms = d_TOW_at_Preamble_ms + static_cast<uint32_t>(GALILEO_INAV_PAGE_PART_MS + (d_required_symbols + 1) * d_PRN_code_period_ms);
d_inav_nav.set_TOW5_flag(false);
}
@ -650,13 +707,13 @@ int galileo_telemetry_decoder_gs::general_work(int noutput_items __attribute__((
{
// TOW_6 refers to the even preamble, but when we decode it we are in the odd part, so 1 second later plus the decoding delay
d_TOW_at_Preamble_ms = static_cast<uint32_t>(d_inav_nav.get_TOW6() * 1000.0);
d_TOW_at_current_symbol_ms = d_TOW_at_Preamble_ms + static_cast<uint32_t>(GALILEO_INAV_PAGE_PART_MS + (d_required_symbols + 1) * GALILEO_E1_CODE_PERIOD_MS);
d_TOW_at_current_symbol_ms = d_TOW_at_Preamble_ms + static_cast<uint32_t>(GALILEO_INAV_PAGE_PART_MS + (d_required_symbols + 1) * d_PRN_code_period_ms);
d_inav_nav.set_TOW6_flag(false);
}
else
{
// this page has no timing information
d_TOW_at_current_symbol_ms += static_cast<uint32_t>(GALILEO_E1_CODE_PERIOD_MS); // + GALILEO_INAV_PAGE_PART_SYMBOLS*GALILEO_E1_CODE_PERIOD_S;
d_TOW_at_current_symbol_ms += static_cast<uint32_t>(d_PRN_code_period_ms); // + GALILEO_INAV_PAGE_PART_SYMBOLS*GALILEO_E1_CODE_PERIOD_S;
}
}
break;

9
src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_telemetry_decoder_gs.h
View File

@ -5,7 +5,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -70,6 +70,11 @@ public:
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
/*!
* \brief This sets the signal type (Galileo E1 or Galileo E5b)
*/
void set_signal_type(gr_vector_const_void_star &input_items);
private:
friend galileo_telemetry_decoder_gs_sptr galileo_make_telemetry_decoder_gs(
const Gnss_Satellite &satellite,
@ -135,6 +140,8 @@ private:
bool d_flag_parity;
bool d_flag_preamble;
bool d_dump;
char signal;
};
#endif // GNSS_SDR_GALILEO_TELEMETRY_DECODER_GS_H