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/*!
* \ file galileo_e1_dll_pll_veml_tracking . cc
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* \ brief Adapts a DLL + PLL VEML ( Very Early Minus Late ) tracking loop block
* to a TrackingInterface for Galileo E1 signals
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* \ author Luis Esteve , 2012. luis ( at ) epsilon - formacion . com
*
* Code DLL + carrier PLL according to the algorithms described in :
* K . Borre , D . M . Akos , N . Bertelsen , P . Rinder , and S . H . Jensen ,
* A Software - Defined GPS and Galileo Receiver . A Single - Frequency
* Approach , Birkhauser , 2007
*
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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*
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* GNSS - SDR is a Global Navigation Satellite System software - defined receiver .
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* This file is part of GNSS - SDR .
*
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* Copyright ( C ) 2010 - 2020 ( see AUTHORS file for a list of contributors )
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* SPDX - License - Identifier : GPL - 3.0 - or - later
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*
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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*/
# include "galileo_e1_dll_pll_veml_tracking.h"
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# include "Galileo_E1.h"
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# include "configuration_interface.h"
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# include "display.h"
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# include "dll_pll_conf.h"
# include "gnss_sdr_flags.h"
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# include <algorithm>
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# include <array>
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# if USE_GLOG_AND_GFLAGS
# include <glog/logging.h>
# else
# include <absl/log/log.h>
# endif
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GalileoE1DllPllVemlTracking : : GalileoE1DllPllVemlTracking (
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const ConfigurationInterface * configuration ,
const std : : string & role ,
unsigned int in_streams ,
unsigned int out_streams )
: role_ ( role ) ,
item_size_ ( sizeof ( gr_complex ) ) ,
channel_ ( 0 ) ,
in_streams_ ( in_streams ) ,
out_streams_ ( out_streams )
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{
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Dll_Pll_Conf trk_params = Dll_Pll_Conf ( ) ;
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trk_params . SetFromConfiguration ( configuration , role_ ) ;
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if ( trk_params . extend_correlation_symbols < 1 )
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{
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trk_params . extend_correlation_symbols = 1 ;
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std : : cout < < TEXT_RED < < " WARNING: Galileo E1. extend_correlation_symbols must be bigger than 0. Coherent integration has been set to 1 symbol (4 ms) " < < TEXT_RESET < < ' \n ' ;
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}
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else if ( ! trk_params . track_pilot and trk_params . extend_correlation_symbols > 1 )
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{
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trk_params . extend_correlation_symbols = 1 ;
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std : : cout < < TEXT_RED < < " WARNING: Galileo E1. Extended coherent integration is not allowed when tracking the data component. Coherent integration has been set to 4 ms (1 symbol) " < < TEXT_RESET < < ' \n ' ;
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}
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if ( ( trk_params . extend_correlation_symbols > 1 ) and ( trk_params . pll_bw_narrow_hz > trk_params . pll_bw_hz or trk_params . dll_bw_narrow_hz > trk_params . dll_bw_hz ) )
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{
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std : : cout < < TEXT_RED < < " WARNING: Galileo E1. PLL or DLL narrow tracking bandwidth is higher than wide tracking one " < < TEXT_RESET < < ' \n ' ;
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}
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const auto vector_length = static_cast < int > ( std : : round ( trk_params . fs_in / ( GALILEO_E1_CODE_CHIP_RATE_CPS / GALILEO_E1_B_CODE_LENGTH_CHIPS ) ) ) ;
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trk_params . vector_length = vector_length ;
trk_params . system = ' E ' ;
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const std : : array < char , 3 > sig { ' 1 ' , ' B ' , ' \0 ' } ;
std : : copy_n ( sig . data ( ) , 3 , trk_params . signal ) ;
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// ################# Make a GNU Radio Tracking block object ################
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DLOG ( INFO ) < < " role " < < role_ ;
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if ( trk_params . item_type = = " gr_complex " )
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{
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tracking_sptr_ = dll_pll_veml_make_tracking ( trk_params ) ;
DLOG ( INFO ) < < " tracking( " < < tracking_sptr_ - > unique_id ( ) < < " ) " ;
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}
else
{
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item_size_ = 0 ;
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tracking_sptr_ = nullptr ;
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LOG ( WARNING ) < < trk_params . item_type < < " unknown tracking item type. " ;
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}
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if ( in_streams_ > 1 )
{
LOG ( ERROR ) < < " This implementation only supports one input stream " ;
}
if ( out_streams_ > 1 )
{
LOG ( ERROR ) < < " This implementation only supports one output stream " ;
}
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}
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void GalileoE1DllPllVemlTracking : : stop_tracking ( )
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{
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tracking_sptr_ - > stop_tracking ( ) ;
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}
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void GalileoE1DllPllVemlTracking : : start_tracking ( )
{
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tracking_sptr_ - > start_tracking ( ) ;
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}
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/*
* Set tracking channel unique ID
*/
void GalileoE1DllPllVemlTracking : : set_channel ( unsigned int channel )
{
channel_ = channel ;
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tracking_sptr_ - > set_channel ( channel ) ;
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}
void GalileoE1DllPllVemlTracking : : set_gnss_synchro ( Gnss_Synchro * p_gnss_synchro )
{
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tracking_sptr_ - > set_gnss_synchro ( p_gnss_synchro ) ;
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}
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void GalileoE1DllPllVemlTracking : : connect ( gr : : top_block_sptr top_block )
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{
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if ( top_block )
{ /* top_block is not null */
} ;
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// nothing to connect, now the tracking uses gr_sync_decimator
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}
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void GalileoE1DllPllVemlTracking : : disconnect ( gr : : top_block_sptr top_block )
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{
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if ( top_block )
{ /* top_block is not null */
} ;
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// nothing to disconnect, now the tracking uses gr_sync_decimator
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}
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gr : : basic_block_sptr GalileoE1DllPllVemlTracking : : get_left_block ( )
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{
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return tracking_sptr_ ;
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}
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gr : : basic_block_sptr GalileoE1DllPllVemlTracking : : get_right_block ( )
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{
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return tracking_sptr_ ;
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}