bionic (1) front-end-cal.1.gz

NAME

       front-end-cal - RF front-end center frequency and sampling rate calibration tool.

SYNOPSIS

       front-end-cal -config_file=<path-to-configuration-file> [OPTION]...

DESCRIPTION

       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 real-time.

       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 [1], 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.

OPTIONS

       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 saved.

       -version Print program version and exit.

       -help Print all the available commandline flags and exit.

SEE ALSO

       gnss-sdr(1),volk_gnsssdr_profile(1)

       Example  of  configuration  file  available  at:  ${prefix}/share/gnss-sdr/conf/front-end-cal.conf, where
       ${prefix}$ uses to be /usr or /usr/local. This will be the configuration file  used  by  default  if  the
       -config_file option is not set.

       [1] C. Fernandez-Prades, J. Arribas, P. Closas, Turning a Television into a GNSS Receiver, in Proceedings
       of ION GNSS+, 15-16 September 2013, Nashville, Tennessee (USA). A  draft  copy  is  freely  available  at
       http://www.cttc.es/publication/turning-a-television-into-a-gnss-receiver/

       Check http://gnss\-sdr.org for more information.

BUGS

       No known bugs.

AUTHOR

       Javier Arribas (javier.arribas@cttc.es)

       This  software  has  been  developed  at  CTTC  (Centre  Tecnologic  de  Telecomunicacions  de Catalunya,
       http://www.cttc.es) with contributions from around the world.