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Fix GLONASS extended correlator

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1. Emit a message from preamble detection branch from telemetry decoder
2. Connect flowgraph message ports to pass the message from telemetry
decoder block to a dll-pll-c-aid-tracking block
3. Name message ports correctly as the massage is passed in samples, not
seconds

Signed-off-by: Vladisslav P <vladisslav2011@gmail.com>
This commit is contained in:
Vladisslav P 2022-05-17 13:40:30 +03:00
parent 0dbecdaa80
commit 9b210485c7
7 changed files with 24 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/algorithms/channel/adapters/channel.cc
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@ -128,6 +128,10 @@ void Channel::connect(gr::top_block_sptr top_block)
// Message ports
top_block->msg_connect(nav_->get_left_block(), pmt::mp("telemetry_to_trk"), trk_->get_right_block(), pmt::mp("telemetry_to_trk"));
if ((trk_->get_right_block()->name() == "glonass_l1_ca_dll_pll_c_aid_tracking_cc") || (trk_->get_right_block()->name() == "glonass_l2_ca_dll_pll_c_aid_tracking_cc"))
{
top_block->msg_connect(nav_->get_left_block(), pmt::mp("preamble_timestamp_samples"), trk_->get_right_block(), pmt::mp("preamble_timestamp_samples"));
}
DLOG(INFO) << "tracking -> telemetry_decoder";
// Message ports
@ -158,6 +162,10 @@ void Channel::disconnect(gr::top_block_sptr top_block)
nav_->disconnect(top_block);
top_block->msg_disconnect(nav_->get_left_block(), pmt::mp("telemetry_to_trk"), trk_->get_right_block(), pmt::mp("telemetry_to_trk"));
if ((trk_->get_right_block()->name() == "glonass_l1_ca_dll_pll_c_aid_tracking_cc") || (trk_->get_right_block()->name() == "glonass_l2_ca_dll_pll_c_aid_tracking_cc"))
{
top_block->msg_disconnect(nav_->get_left_block(), pmt::mp("preamble_timestamp_samples"), trk_->get_right_block(), pmt::mp("preamble_timestamp_samples"));
}
if (!flag_enable_fpga_)
{
top_block->msg_disconnect(acq_->get_right_block(), pmt::mp("events"), channel_msg_rx_, pmt::mp("events"));

2
src/algorithms/telemetry_decoder/gnuradio_blocks/glonass_l1_ca_telemetry_decoder_gs.cc
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@ -69,6 +69,7 @@ glonass_l1_ca_telemetry_decoder_gs::glonass_l1_ca_telemetry_decoder_gs(
this->message_port_register_out(pmt::mp("telemetry"));
// Control messages to tracking block
this->message_port_register_out(pmt::mp("telemetry_to_trk"));
this->message_port_register_out(pmt::mp("preamble_timestamp_samples"));
if (d_enable_navdata_monitor)
{
@ -367,6 +368,7 @@ int glonass_l1_ca_telemetry_decoder_gs::general_work(int noutput_items __attribu
// try to decode frame
LOG(INFO) << "Starting string decoder for GLONASS L1 C/A SAT " << this->d_satellite;
d_preamble_index = d_sample_counter; // record the preamble sample stamp
this->message_port_pub(pmt::mp("preamble_timestamp_samples"), pmt::mp(d_preamble_time_samples));
d_stat = 2;
}
else

2
src/algorithms/telemetry_decoder/gnuradio_blocks/glonass_l2_ca_telemetry_decoder_gs.cc
View File

@ -69,6 +69,7 @@ glonass_l2_ca_telemetry_decoder_gs::glonass_l2_ca_telemetry_decoder_gs(
this->message_port_register_out(pmt::mp("telemetry"));
// Control messages to tracking block
this->message_port_register_out(pmt::mp("telemetry_to_trk"));
this->message_port_register_out(pmt::mp("preamble_timestamp_samples"));
if (d_enable_navdata_monitor)
{
@ -366,6 +367,7 @@ int glonass_l2_ca_telemetry_decoder_gs::general_work(int noutput_items __attribu
// try to decode frame
LOG(INFO) << "Starting string decoder for GLONASS L2 C/A SAT " << this->d_satellite;
d_preamble_index = d_sample_counter; // record the preamble sample stamp
this->message_port_pub(pmt::mp("preamble_timestamp_samples"), pmt::mp(d_preamble_time_samples));
d_stat = 2;
}
else

10
src/algorithms/tracking/gnuradio_blocks/glonass_l1_ca_dll_pll_c_aid_tracking_cc.cc
View File

@ -87,7 +87,7 @@ void glonass_l1_ca_dll_pll_c_aid_tracking_cc::msg_handler_preamble_index(const p
DLOG(INFO) << "Extended correlation enabled for Tracking CH " << d_channel << ": Satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN);
if (d_enable_extended_integration == false) // avoid re-setting preamble indicator
{
d_preamble_timestamp_s = pmt::to_double(msg);
d_preamble_timestamp_samples = pmt::to_double(msg);
d_enable_extended_integration = true;
d_preamble_synchronized = false;
}
@ -138,7 +138,7 @@ glonass_l1_ca_dll_pll_c_aid_tracking_cc::glonass_l1_ca_dll_pll_c_aid_tracking_cc
d_code_error_filt_chips_s(0.0),
d_code_error_filt_chips_Ti(0.0),
d_carr_phase_error_secs_Ti(0.0),
d_preamble_timestamp_s(0.0),
d_preamble_timestamp_samples(0.0),
d_extend_correlation_ms(extend_correlation_ms),
d_correlation_length_samples(static_cast<int32_t>(d_vector_length)),
d_sample_counter(0ULL),
@ -156,9 +156,9 @@ glonass_l1_ca_dll_pll_c_aid_tracking_cc::glonass_l1_ca_dll_pll_c_aid_tracking_cc
d_dump(dump)
{
// Telemetry bit synchronization message port input
this->message_port_register_in(pmt::mp("preamble_timestamp_s"));
this->message_port_register_in(pmt::mp("preamble_timestamp_samples"));
this->set_msg_handler(pmt::mp("preamble_timestamp_s"),
this->set_msg_handler(pmt::mp("preamble_timestamp_samples"),
#if HAS_GENERIC_LAMBDA
[this](auto &&PH1) { msg_handler_preamble_index(PH1); });
#else
@ -602,7 +602,7 @@ int glonass_l1_ca_dll_pll_c_aid_tracking_cc::general_work(int noutput_items __at
bool enable_dll_pll;
if (d_enable_extended_integration == true)
{
int64_t symbol_diff = round(1000.0 * ((static_cast<double>(d_sample_counter) + d_rem_code_phase_samples) / static_cast<double>(d_fs_in) - d_preamble_timestamp_s));
int64_t symbol_diff = round(1000.0 * ((static_cast<double>(d_sample_counter) + d_rem_code_phase_samples - d_preamble_timestamp_samples) / static_cast<double>(d_fs_in)));
if (symbol_diff > 0 and symbol_diff % d_extend_correlation_ms == 0)
{
// compute coherent integration and enable tracking loop

2
src/algorithms/tracking/gnuradio_blocks/glonass_l1_ca_dll_pll_c_aid_tracking_cc.h
View File

@ -171,7 +171,7 @@ private:
double d_code_error_filt_chips_Ti;
double d_carr_phase_error_secs_Ti;
double d_preamble_timestamp_s;
double d_preamble_timestamp_samples;
int32_t d_extend_correlation_ms;
// Integration period in samples

10
src/algorithms/tracking/gnuradio_blocks/glonass_l2_ca_dll_pll_c_aid_tracking_cc.cc
View File

@ -84,7 +84,7 @@ void glonass_l2_ca_dll_pll_c_aid_tracking_cc::msg_handler_preamble_index(const p
DLOG(INFO) << "Extended correlation enabled for Tracking CH " << d_channel << ": Satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN);
if (d_enable_extended_integration == false) // avoid re-setting preamble indicator
{
d_preamble_timestamp_s = pmt::to_double(msg);
d_preamble_timestamp_samples = pmt::to_double(msg);
d_enable_extended_integration = true;
d_preamble_synchronized = false;
}
@ -135,7 +135,7 @@ glonass_l2_ca_dll_pll_c_aid_tracking_cc::glonass_l2_ca_dll_pll_c_aid_tracking_cc
d_code_error_filt_chips_s(0.0),
d_code_error_filt_chips_Ti(0.0),
d_carr_phase_error_secs_Ti(0.0),
d_preamble_timestamp_s(0.0),
d_preamble_timestamp_samples(0.0),
d_extend_correlation_ms(extend_correlation_ms),
d_correlation_length_samples(static_cast<int32_t>(d_vector_length)),
d_sample_counter(0ULL),
@ -153,9 +153,9 @@ glonass_l2_ca_dll_pll_c_aid_tracking_cc::glonass_l2_ca_dll_pll_c_aid_tracking_cc
d_dump(dump)
{
// Telemetry bit synchronization message port input
this->message_port_register_in(pmt::mp("preamble_timestamp_s"));
this->message_port_register_in(pmt::mp("preamble_timestamp_samples"));
this->set_msg_handler(pmt::mp("preamble_timestamp_s"),
this->set_msg_handler(pmt::mp("preamble_timestamp_samples"),
#if HAS_GENERIC_LAMBDA
[this](auto &&PH1) { msg_handler_preamble_index(PH1); });
#else
@ -600,7 +600,7 @@ int glonass_l2_ca_dll_pll_c_aid_tracking_cc::general_work(int noutput_items __at
bool enable_dll_pll;
if (d_enable_extended_integration == true)
{
const int64_t symbol_diff = round(1000.0 * ((static_cast<double>(d_sample_counter) + d_rem_code_phase_samples) / static_cast<double>(d_fs_in) - d_preamble_timestamp_s));
const int64_t symbol_diff = round(1000.0 * ((static_cast<double>(d_sample_counter) + d_rem_code_phase_samples - d_preamble_timestamp_samples) / static_cast<double>(d_fs_in)));
if (symbol_diff > 0 and symbol_diff % d_extend_correlation_ms == 0)
{
// compute coherent integration and enable tracking loop

2
src/algorithms/tracking/gnuradio_blocks/glonass_l2_ca_dll_pll_c_aid_tracking_cc.h
View File

@ -168,7 +168,7 @@ private:
double d_code_error_filt_chips_s;
double d_code_error_filt_chips_Ti;
double d_carr_phase_error_secs_Ti;
double d_preamble_timestamp_s;
double d_preamble_timestamp_samples;
int32_t d_extend_correlation_ms;
// Integration period in samples