2011-11-22 17:21:54 +00:00
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/*!
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- Major changes:
- The executable file and the default configuration file is now changed from "./install/mercurio" and "./conf/mercurio.conf" to "./install/gnss-sdr" and "./conf/gnss-sdr.conf", respectively.
- Configuration file structure changed to define in a single entry the internal sampling frequency (after the signal conditioner). NOTICE that this change affects the all the adapters (acquisition, tracking, telemetry_decoder, observables, and PVT). All the adapters are now modified to work with this feature.
- Moved several in-line GPS L1 CA parameters (a.k.a magic numbers..) to ./src/core/system_parameters/GPS_L1_CA.h definition file.
- Tracking blocks now uses DOUBLE values in their outputs.
- Observables and PVT now are separated. PVT and their associated libraries are moved to ./src/algorithms/PVT
- Temporarily disabled the RINEX output (I am working on that!)
- GNSS-SDR screen output now gives extended debug information of the receiver status and events. In the future, this output will be redirected to a log file.
- Bug fixes:
- FILE_SIGNAL_SOURCE now works correctly when the user configures GNSS-SDR to process the entire file.
- GPS_L1_CA_DLL_PLL now computes correctly the PRN start values.
- GPS_L1_CA_DLL_FLL_PLL now computes correctly the PRN start values.
- Several modifications in GPS_L1_CA_Telemetry_Decoder, GPS_L1_CA_Observables, and GPS_L1_CA_PVT modules to fix the GPS position computation.
- New features
- Tracking blocks perform a signal integrity check against NaN outliers before the correlation process.
- Tracking and PVT binary dump options are now documented and we provide MATLAB libraries and sample files to read it. Available in ./utils/matlab" and "./utils/matlab/libs"
- Observables output rate can be configured. This option enables the GPS L1 CA PVT computation at a maximum rate of 1ms.
- GPS_L1_CA_PVT now can perform a moving average Latitude, Longitude, and Altitude output for each of the Observables output. It is configurable using the configuration file.
- Added Google Earth compatible Keyhole Markup Language (KML) output writer class (./src/algorithms/PVT/libs/kml_printer.h and ./src/algorithms/PVT/libs/kml_printer.cc ). You can see the receiver position directly using Google Earth.
- We provide a master configuration file which includes an in-line documentation with all the new (and old) options. It can be found in ./conf/master.conf
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@84 64b25241-fba3-4117-9849-534c7e92360d
2011-12-07 17:59:34 +00:00
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* \file tracking_2nd_DLL_filter.h
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2011-12-28 21:36:45 +00:00
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* \brief Interface of a 2nd order DLL filter for code tracking loop.
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2011-11-22 17:21:54 +00:00
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* \author Javier Arribas, 2011. jarribas(at)cttc.es
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*
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2011-12-28 21:36:45 +00:00
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* Class that implements a 2nd order PLL filter for code tracking loop.
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* The algorithm is described in:
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* K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S. H. Jensen,
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* A Software-Defined GPS and Galileo Receiver. A Single-Frequency Approach,
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2011-11-22 17:21:54 +00:00
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* Birkhauser, 2007, Applied and Numerical Harmonic Analysis.
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*
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2020-07-28 14:57:15 +00:00
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* -----------------------------------------------------------------------------
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2011-11-22 17:21:54 +00:00
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*
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2020-12-30 12:35:06 +00:00
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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2011-11-22 17:21:54 +00:00
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* This file is part of GNSS-SDR.
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*
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2020-12-30 12:35:06 +00:00
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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2020-02-08 00:20:02 +00:00
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* SPDX-License-Identifier: GPL-3.0-or-later
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2011-11-22 17:21:54 +00:00
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*
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2020-07-28 14:57:15 +00:00
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* -----------------------------------------------------------------------------
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2011-11-22 17:21:54 +00:00
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*/
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2020-02-08 09:10:46 +00:00
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#ifndef GNSS_SDR_TRACKING_2ND_DLL_FILTER_H
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#define GNSS_SDR_TRACKING_2ND_DLL_FILTER_H
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2011-11-22 17:21:54 +00:00
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2020-11-01 12:37:19 +00:00
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/** \addtogroup Tracking
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* \{ */
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/** \addtogroup Tracking_libs
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* \{ */
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2011-12-28 03:05:37 +00:00
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/*!
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* \brief This class implements a 2nd order DLL filter for code tracking loop.
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*
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* The algorithm is described in:
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2012-03-24 02:53:00 +00:00
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* K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S. H. Jensen, A Software-Defined GPS
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* and Galileo Receiver. A Single-Frequency Approach,
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2011-12-28 03:05:37 +00:00
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* Birkhauser, 2007, Applied and Numerical Harmonic Analysis.
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*/
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2012-01-13 00:49:24 +00:00
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class Tracking_2nd_DLL_filter
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2011-11-22 17:21:54 +00:00
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{
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2019-07-01 21:44:42 +00:00
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public:
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2020-06-23 07:47:58 +00:00
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Tracking_2nd_DLL_filter();
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~Tracking_2nd_DLL_filter() = default;
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explicit Tracking_2nd_DLL_filter(float pdi_code);
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2019-07-01 21:44:42 +00:00
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void set_DLL_BW(float dll_bw_hz); //!< Set DLL filter bandwidth [Hz]
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void set_pdi(float pdi_code); //!< Set Summation interval for code [s]
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void initialize(); //!< Start tracking with acquisition information
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float get_code_nco(float DLL_discriminator); //!< Numerically controlled oscillator
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2011-11-22 17:21:54 +00:00
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private:
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2020-06-23 07:47:58 +00:00
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void calculate_lopp_coef(float* tau1, float* tau2, float lbw, float zeta, float k);
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2011-11-22 17:21:54 +00:00
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// PLL filter parameters
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2018-03-12 14:16:39 +00:00
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float d_tau1_code = 0.0;
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float d_tau2_code = 0.0;
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float d_pdi_code = 0.0;
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float d_dllnoisebandwidth = 0.0;
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float d_dlldampingratio = 0.0;
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float d_old_code_error = 0.0;
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float d_old_code_nco = 0.0;
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2011-11-22 17:21:54 +00:00
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};
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2020-11-01 12:37:19 +00:00
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/** \} */
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/** \} */
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2011-11-22 17:21:54 +00:00
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#endif
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