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Updated GNSS Flowgraph

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This commit is contained in:
piyush0411 2020-06-14 21:18:36 +05:30
parent da3794dc67
commit 1935e46950
2 changed files with 96 additions and 2 deletions
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94
src/core/receiver/gnss_flowgraph.cc
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@ -9,7 +9,7 @@
*
* -------------------------------------------------------------------------
*
* 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
@ -27,6 +27,7 @@
#include "GPS_L5.h"
#include "Galileo_E1.h"
#include "Galileo_E5a.h"
#include "Galileo_E5b.h"
#include "channel.h"
#include "channel_fsm.h"
#include "channel_interface.h"
@ -405,6 +406,9 @@ void GNSSFlowgraph::connect()
case evGAL_5X:
acq_fs = GALILEO_E5A_OPT_ACQ_FS_SPS;
break;
case evGAL_7X:
acq_fs = GALILEO_E5B_OPT_ACQ_FS_SPS;
break;
case evGLO_1G:
acq_fs = fs;
break;
@ -630,6 +634,12 @@ void GNSSFlowgraph::connect()
available_GAL_5X_signals_.remove(signal_value);
break;
case evGAL_7X:
gnss_system = "Galileo";
signal_value = Gnss_Signal(Gnss_Satellite(gnss_system, sat), gnss_signal);
available_GAL_7X_signals_.remove(signal_value);
break;
case evGLO_1G:
gnss_system = "Glonass";
signal_value = Gnss_Signal(Gnss_Satellite(gnss_system, sat), gnss_signal);
@ -1081,6 +1091,11 @@ void GNSSFlowgraph::push_back_signal(const Gnss_Signal& gs)
available_GAL_5X_signals_.push_back(gs);
break;
case evGAL_7X:
available_GAL_7X_signals_.remove(gs);
available_GAL_7X_signals_.push_back(gs);
break;
case evGLO_1G:
available_GLO_1G_signals_.remove(gs);
available_GLO_1G_signals_.push_back(gs);
@ -1132,6 +1147,10 @@ void GNSSFlowgraph::remove_signal(const Gnss_Signal& gs)
available_GAL_5X_signals_.remove(gs);
break;
case evGAL_7X:
available_GAL_7X_signals_.remove(gs);
break;
case evGLO_1G:
available_GLO_1G_signals_.remove(gs);
break;
@ -1166,6 +1185,9 @@ double GNSSFlowgraph::project_doppler(const std::string& searched_signal, double
case evGAL_5X:
return (primary_freq_doppler_hz / FREQ1) * FREQ5;
break;
case evGAL_7X:
return (primary_freq_doppler_hz / FREQ1) * FREQ7;
break;
case evGPS_2S:
return (primary_freq_doppler_hz / FREQ1) * FREQ2;
break;
@ -1425,6 +1447,14 @@ void GNSSFlowgraph::priorize_satellites(const std::vector<std::pair<int, Gnss_Sa
{
available_GAL_5X_signals_.push_front(gs);
}
gs = Gnss_Signal(visible_satellite.second, "7X");
old_size = available_GAL_7X_signals_.size();
available_GAL_7X_signals_.remove(gs);
if (old_size > available_GAL_7X_signals_.size())
{
available_GAL_7X_signals_.push_front(gs);
}
}
}
}
@ -1569,6 +1599,7 @@ void GNSSFlowgraph::init()
mapStringValues_["L5"] = evGPS_L5;
mapStringValues_["1B"] = evGAL_1B;
mapStringValues_["5X"] = evGAL_5X;
mapStringValues_["7X"] = evGAL_7X;
mapStringValues_["1G"] = evGLO_1G;
mapStringValues_["2G"] = evGLO_2G;
mapStringValues_["B1"] = evBDS_B1;
@ -1800,6 +1831,19 @@ void GNSSFlowgraph::set_signals_list()
}
}
if (configuration_->property("Channels_7X.count", 0) > 0)
{
// Loop to create the list of Galileo E5b signals
for (available_gnss_prn_iter = available_galileo_prn.cbegin();
available_gnss_prn_iter != available_galileo_prn.cend();
available_gnss_prn_iter++)
{
available_GAL_7X_signals_.emplace_back(
Gnss_Satellite(std::string("Galileo"), *available_gnss_prn_iter),
std::string("7X"));
}
}
if (configuration_->property("Channels_1G.count", 0) > 0)
{
// Loop to create the list of GLONASS L1 C/A signals
@ -1901,6 +1945,10 @@ bool GNSSFlowgraph::is_multiband() const
{
multiband = true;
}
if (configuration_->property("Channels_7X.count", 0) > 0)
{
multiband = true;
}
}
if (configuration_->property("Channels_1G.count", 0) > 0)
{
@ -2094,6 +2142,50 @@ Gnss_Signal GNSSFlowgraph::search_next_signal(const std::string& searched_signal
}
break;
case evGAL_7X:
if (configuration_->property("Channels_1B.count", 0) > 0)
{
// 1. Get the current channel status map
std::map<int, std::shared_ptr<Gnss_Synchro>> current_channels_status = channels_status_->get_current_status_map();
// 2. search the currently tracked Galileo E1 satellites and assist the Galileo E5 acquisition if the satellite is not tracked on E5
for (auto& current_status : current_channels_status)
{
if (std::string(current_status.second->Signal) == "1B")
{
std::list<Gnss_Signal>::iterator it2;
it2 = std::find_if(std::begin(available_GAL_7X_signals_), std::end(available_GAL_7X_signals_),
[&](Gnss_Signal const& sig) { return sig.get_satellite().get_PRN() == current_status.second->PRN; });
if (it2 != available_GAL_7X_signals_.end())
{
estimated_doppler = current_status.second->Carrier_Doppler_hz;
RX_time = current_status.second->RX_time;
// std::cout << " Channel: " << it->first << " => Doppler: " << estimated_doppler << "[Hz] \n";
// 3. return the Gal 7X satellite and remove it from list
result = *it2;
if (pop)
{
available_GAL_7X_signals_.erase(it2);
}
found_signal = true;
assistance_available = true;
break;
}
}
}
}
// fallback: pick the front satellite because there is no tracked satellites in E1 to assist E5
if (found_signal == false)
{
result = available_GAL_7X_signals_.front();
available_GAL_7X_signals_.pop_front();
if (!pop)
{
available_GAL_7X_signals_.push_back(result);
}
}
break;
case evGLO_1G:
result = available_GLO_1G_signals_.front();
available_GLO_1G_signals_.pop_front();

4
src/core/receiver/gnss_flowgraph.h
View File

@ -11,7 +11,7 @@
*
* -------------------------------------------------------------------------
*
* 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
@ -205,6 +205,7 @@ private:
std::list<Gnss_Signal> available_SBAS_1C_signals_;
std::list<Gnss_Signal> available_GAL_1B_signals_;
std::list<Gnss_Signal> available_GAL_5X_signals_;
std::list<Gnss_Signal> available_GAL_7X_signals_;
std::list<Gnss_Signal> available_GLO_1G_signals_;
std::list<Gnss_Signal> available_GLO_2G_signals_;
std::list<Gnss_Signal> available_BDS_B1_signals_;
@ -217,6 +218,7 @@ private:
evSBAS_1C,
evGAL_1B,
evGAL_5X,
evGAL_7X,
evGLO_1G,
evGLO_2G,
evBDS_B1,