Add FDMA protocol to pcps algorithm

src/algorithms/acquisition/adapters/glonass_l1_ca_pcps_acquisition.cc

@@ -36,14 +36,8 @@ GlonassL1CaPcpsAcquisition::GlonassL1CaPcpsAcquisition(
     //--- Find number of samples per spreading code -------------------------
     code_length_ = round(fs_in_ / (GLONASS_L1_CA_CODE_RATE_HZ / GLONASS_L1_CA_CODE_LENGTH_CHIPS));
 
-    LOG(ERROR) << "fs_in_ " << fs_in_;
-    LOG(ERROR) << "code_length_ " << code_length_;
-
     vector_length_ = code_length_ * sampled_ms_;
 
-    LOG(ERROR) << "vector_length_ " << vector_length_;
-    
-
     if( bit_transition_flag_ )
         {
             vector_length_ *= 2;

src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc

@@ -34,6 +34,7 @@
 
 #include "pcps_acquisition_cc.h"
 #include <sstream>
+#include <cstring>
 #include <boost/filesystem.hpp>
 #include <gnuradio/io_signature.h>
 #include <glog/logging.h>
@@ -159,6 +160,11 @@ pcps_acquisition_cc::~pcps_acquisition_cc()
 
 void pcps_acquisition_cc::set_local_code(std::complex<float> * code)
 {
+    // This will check if it's fdma, if yes will update the intermediate frequency and the doppler grid
+    if( is_fdma() )
+        {
+            update_grid_doppler_wipeoffs();
+        }
     // COD
     // Here we want to create a buffer that looks like this:
     // [ 0 0 0 ... 0 c_0 c_1 ... c_L]
@@ -179,6 +185,21 @@ void pcps_acquisition_cc::set_local_code(std::complex<float> * code)
     volk_32fc_conjugate_32fc(d_fft_codes, d_fft_if->get_outbuf(), d_fft_size);
 }
 
+bool pcps_acquisition_cc::is_fdma()
+{
+    // Dealing with FDMA system
+    if( strcmp(d_gnss_synchro->Signal,"1G") == 0 )
+        {
+            d_freq += DFRQ1_GLO * GLONASS_PRN.at(d_gnss_synchro->PRN);
+            LOG(INFO) << "Trying to acquire SV PRN " << d_gnss_synchro->PRN << " with freq " << DFRQ1_GLO * GLONASS_PRN.at(d_gnss_synchro->PRN) << " in Channel " << GLONASS_PRN.at(d_gnss_synchro->PRN) << std::endl;
+            return true;
+        }
+    else
+        {
+            return false;
+        }
+}
+
 
 void pcps_acquisition_cc::update_local_carrier(gr_complex* carrier_vector, int correlator_length_samples, float freq)
 {
@@ -203,7 +224,10 @@ void pcps_acquisition_cc::init()
     d_input_power = 0.0;
 
     d_num_doppler_bins = ceil( static_cast<double>(static_cast<int>(d_doppler_max) - static_cast<int>(-d_doppler_max)) / static_cast<double>(d_doppler_step));
+}
 
+void pcps_acquisition_cc::update_grid_doppler_wipeoffs()
+{
     // Create the carrier Doppler wipeoff signals
     d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
 
@@ -216,6 +240,7 @@ void pcps_acquisition_cc::init()
 }
 
 
+
 void pcps_acquisition_cc::set_state(int state)
 {
     gr::thread::scoped_lock lock(d_setlock); // require mutex with work function called by the scheduler

src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.h

@@ -95,6 +95,8 @@ private:
             std::string dump_filename);
 
     void update_local_carrier(gr_complex* carrier_vector, int correlator_length_samples, float freq);
+    void update_grid_doppler_wipeoffs();
+    bool is_fdma();
 
     void send_negative_acquisition();
     void send_positive_acquisition();
@@ -148,12 +150,6 @@ public:
      {
          gr::thread::scoped_lock lock(d_setlock); // require mutex with work function called by the scheduler
          d_gnss_synchro = p_gnss_synchro;
-         // Dealing with FDMA system
-         if(d_gnss_synchro->System == 'R')
-          {
-            d_freq += 0.5625e6 * GLONASS_PRN[d_gnss_synchro->PRN+1];
-            std::cout << "d_freq " << d_freq << std::endl;
-          }
      }
 
      /*!