PSEUDORANGE
CARRIER PHASE
CARRIER DOPPLER
SIGNAL STRENGTH (dB-Hz)
thus, it enables the realtime kinematics and PPP positioning for first time in an open source GNSS SDR. Enjoy!
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@359 64b25241-fba3-4117-9849-534c7e92360d
- Updated Unit Test to benchmark all the current NCO implementations (./run_tests --gtest_filter=Cordic_Test.StandardCIsFasterThanCordic)
-Gps_L1_Ca_Dll_Pll_Optim_Tracking algorithm updated with new NCO library for carrier wipeoff and some other optimizations.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@281 64b25241-fba3-4117-9849-534c7e92360d
- The local code replica is pre-initialized and resampled to the nominal PRN code sample rate (no code Doppler correction)
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@242 64b25241-fba3-4117-9849-534c7e92360d
1) Galileo E1 Acquisition adapter block added (Gnuradio block modification to use the same block with the 2 systems with 2 adapters)
2) Tests and signal samples for Galileo E1 Acquisition signal block
3) Library for Galileo E1 signal processing
4) Galileo_E1.h with constant variables for this system
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@209 64b25241-fba3-4117-9849-534c7e92360d
- Updated all available trackings to generate the tracking_timestamp_secs taking into account the remainder code phase.
- Updated the telemetry decoder to track the number of symbol shifted from the preamble start symbol (to be used in observables).
- Updated observables to align the reference channel symbol with the corresponding symbols in the other channels and compute pseudorranges using the common transmission time algorithm.
- Updated PVT to independize the display output rate from the RINEX and KML log files. New options available in config file!
- Some minor improvements and code cleaning.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@193 64b25241-fba3-4117-9849-534c7e92360d
- Added a total elapsed run time counter in main: now it is possible to compare the post-processing time with the signal duration. The elapsed time is reported in STD::COUT when GNSS-SDR finish the main thread.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@156 64b25241-fba3-4117-9849-534c7e92360d
boost::filesystem::temp_directory_path() is only available from Boost 1.45, while Ubuntu 10.10 comes with Boost 1.42.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@104 64b25241-fba3-4117-9849-534c7e92360d
- 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
New tracking libraries:
- tracking_discriminators: Library with a set of code tracking and carrier tracking discriminators that is used by the tracking algorithms. (fully documented, including math algorithms using doxygen!)
- tracking_2rd_DLL_filter: Class that implements 2 order DLL filter for code tracking loop.
- tracking_2rd_PLL_filter: Class that implements 2 order PLL filter for carrier tracking loop.
- tracking_FLL_PLL_filter: Class that implements hybrid FLL and PLL filter for tracking carrier loop.
- CN_estimators: Library with a set of Carrier to Noise estimators and lock detectors. (fully documented, including math algorithms using doxygen!)
Tracking:
- gps_l1_ca_dll_pll_tracking: The existing DLL + PLL tracking module, which is the K.Borre and D.Akos one, is now completely re-factored. Now uses the above described libraries.
- gps_l1_ca_dll_fll_pll_tracking: This is a brand new tracking module, which implements the FLL assisted PLL described in Kaplan (2nd edition). (also documentedwith references)
Configuration options:
- The following tracking parameters are added:
;######### TRACKING CONFIG ############
; Tracking.implementation=GPS_L1_CA_DLL_PLL_Tracking or GPS_L1_CA_DLL_FLL_PLL_Tracking
Tracking.implementation=GPS_L1_CA_DLL_FLL_PLL_Tracking
;PLL filter bandwidth in Hz.
Tracking.pll_bw_hz=50.0;
;DLL filter bandwidth in Hz.
Tracking.dll_bw_hz=2.0;
;FLL filter bandwidth in Hz.
Tracking.fll_bw_hz=50;
;filter order: choice between 2 or 3 at this moment, only for FLL assisted PLL
Tracking.order=2;
;Correlator space in chips units
Tracking.early_late_space_chips=0.5;
Other files have also been modified with minor changes to adapt to new modules or minor bug fixes.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@80 64b25241-fba3-4117-9849-534c7e92360d
