This is the command front-end-cal that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
front-end-cal - RF front-end center frequency and sampling rate calibration tool.
front-end-cal -config_file=<path-to-configuration-file> [OPTION]...
front-end-cal is a calibration tool for some DVB-T receivers based on the Taiwan's Realtek
RTL2832U chipset, sold in form of USB dongles that allow users to watch over-the-air DVB-T
European broadcast television on their personal computers, to be used as GNSS front-ends.
Normally, those devices send partially-decoded MPEG transport frames over the USB, but
exploiting an undocumented mode of operation of the demodulator chip, the user is able to
obtain raw I&Q samples, stream them through USB to a personal computer and then use
gnss-sdr, turning the DVB-T receiver into a GNSS receiver and delivering position in
The crystal oscillator that ships with the RTL2832U family devices exhibits limited
accuracy to be used as a GNSS receiver front-end without previous calibration.
front-end-cal implements the algorithm proposed in , and it requires Internet access
since it retrieves Assisted GPS data from SUPL servers.
front-end-cal is able to work with raw data files or, if there is computational power
enough, in real time with suitable radio frequency front-ends. The whole receiver is
defined in a single configuration file, and therefore users can define theirs.
front-end-cal takes the following options:
-config_file=<path-to-configuration-file> Set the configuration file.
-signal_source=<path-to-raw-signal-file> If defined, path to the file containing the
signal samples (overrides the data file specified in the configuration file).
-log_dir=<path-to-directory> If defined, overrides the default directory where logs are
-version Print program version and exit.
-help Print all the available commandline flags and exit.
Use front-end-cal online using onworks.net services