GNU Radio blocks for receiving/transmitting GSM
Go to file
Vadim Yanitskiy 2de47e28ce dists: add PKGBUILD script for Arch Linux
Change-Id: Iabf6db281e95e72cdf0bd744bb7fd00c09360a38
2021-05-05 14:16:24 +02:00
apps Execute python apps with use of python3 2021-05-03 07:14:00 +02:00
cmake Fix grcc compilation with python3 by adding local subdirs to __path__ 2021-05-03 07:14:00 +02:00
dists dists: add PKGBUILD script for Arch Linux 2021-05-05 14:16:24 +02:00
docs cmake: make formatting of install statements follow one pattern 2021-05-03 07:14:00 +02:00
examples@32727fc905 Updated examples pointer 2017-12-01 12:04:39 +01:00
grc cmake: make formatting of install statements follow one pattern 2021-05-03 07:14:00 +02:00
hier_blocks Port compile_demappers helper script to gr3.8 2021-05-03 07:14:00 +02:00
include/grgsm Fix compilation error: '_1' was not declared in this scope 2021-05-03 20:34:13 +02:00
lib Fix compilation error: '_1' was not declared in this scope 2021-05-03 20:34:13 +02:00
python cmake: make formatting of install statements follow one pattern 2021-05-03 07:14:00 +02:00
swig GNU Radio 3.8 support 2021-05-03 07:14:00 +02:00
test_data@e2e5b44bc2 Add tch_f_decoder tests 2018-04-06 15:18:26 +02:00
tests tests: Add test for Ubuntu 20.04 2021-05-03 12:05:56 +02:00
.dockerignore travis: Test in Ubuntu 18.04 container 2021-05-03 07:14:00 +02:00
.gitignore Updates .gitignore and examples pointer 2017-11-11 11:22:23 +01:00
.gitmodules Changed submodule URLs to point to osmocom servers 2018-08-31 12:22:33 +02:00
.gitreview Add .gitreview similar to the other osmocom's projects 2018-09-13 13:56:35 +00:00
.travis.yml tests: Add test for Ubuntu 20.04 2021-05-03 12:05:56 +02:00
CMakeLists.txt Remove local copy of associated osmo libraries 2021-05-03 07:14:00 +02:00
COPYING Big update of copyright statements so they can be automatically processed to produce debian/copyright file 2017-08-23 16:02:19 +02:00
LICENSE Added separate file for short license notice (that is used for example by gr_modtool to add these notices) and longer Copying file with full license. 2014-12-15 09:03:49 +01:00 Added more copyright holders 2018-03-22 16:12:03 +01:00 Keep the old mailing list for now 2018-07-12 10:46:39 +02:00 Changed arrangment of directories and names of files for testing 2016-04-11 22:20:35 +02:00

The gr-gsm project

The gr-gsm project is based on the gsm-receiver written by Piotr Krysik (also the main author of gr-gsm) for the Airprobe project.

The aim is to provide set of tools for receiving information transmitted by GSM equipment/devices.

Installation and usage

Please see project's wiki for information on installation and usage of gr-gsm.

Mailing list

Current gr-gsm project's mailing list address is following:

Mailing list is a place for general discussions, questions about the usage and installation. In case of problem with installation please try to provide full information that will help reproducing it. Minimum information should contain:

  • operating system with version,
  • kind of installation (how gr-gsm and its dependencies were installed: with pybombs, from distibution's repository, compiled manually)
  • version of gnuradio (it can be obtained with: gnuradio-companion --version)
  • error messages (in case of pybombs installation they can be obtained after switching it to verbous mode with -v option).

To join the group with any e-mail address, use this link:!forum/gr-gsm/join


New features are accepted through github's pull requests. When creating pull request try to make it adress one topic (addition of a feature x, correction of bug y).

If you wish to develop something for gr-gsm but don't know exactly what, then look for issues with label "Enhancement". Select one that you feel you are able to complete. After that claim it by commenting in the comment section of the issue. If there is any additional information about gr-gsm needed by you to make completing the task easier - just ask.


Short presentation of Airprobe'like application of gr-gsm:


Piotr Krysik <ptrkrysik (at)> - main author and project maintainer

Roman Khassraf <rkhassraf (at)> - blocks for demultiplexing and decoding of voice channels, decryption block supporting all ciphers used in GSM, blocks for storing and reading GSM bursts, project planning and user support

Vadim Yanitskiy <axilirator (at)> - control and data interface for the transceiver, grgsm_trx application

Vasil Velichkov <vvvelichkov (at)> - automatic compilation of grc applications, fixes and user support

Pieter Robyns <pieter.robyns (at)> - block reversing channel hopping


This work is built upon the efforts made by many people to gather knowledge of GSM.

First very significant effort of public research into GSM and its security vulnerabilities was The Hacker's Choice GSM SCANNER PROJECT. One of the results of this project was creation of a software GSM receiver by Tvoid - gsm-tvoid - which was was the most important predecessor of gr-gsm and of gsm-receiver from the Airprobe project.

Gr-gsm wouldn't be also possible without help and inspiration by Harald Welte, Dieter Spaar and Sylvain Munaut.

Special thanks to Pawel Koszut who generously lent his USRP1 to the author of gr-gsm (Piotr Krysik) in 2007-2010.