# Announcing new gr-gsm project

**URL:** <https://www.ruby-forum.com/t/announcing-new-gr-gsm-project/234858>\
**Category:** GNU Radio\
**Created:** [November 30, 2014, 3:07pm UTC](https://www.ruby-forum.com/t/announcing-new-gr-gsm-project/234858 "2014-11-30T15:07:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [November 30, 2014, 3:07pm UTC](https://www.ruby-forum.com/t/announcing-new-gr-gsm-project/234858/1 "2014-11-30T15:07:09Z")

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Dear all,

I was working for some time on a project of a set of GNU Radio tools for  
receiving GSM transmissions. As the project reached the point where it  
might be useful for the community I have decided to officially announce  
it. It is available on github with short installation and usage guides:

> **[ptrkrysik - Overview](https://github.com/ptrkrysik)**
>
> ptrkrysik has 13 repositories available. Follow their code on GitHub.

Currently there is one gr-gsm application that should work out of the  
box and it is a more reliable replacement of Airprobe. The gr-gsm has  
some similarities with it. The GSM receiver that I used is considerably  
corrected version of the receiver that I’ve long time ago written for  
the Airprobe project but with removed Airprobe’s stuff that shouldn’t be  
mixed with the receiver (like decryption, decoding). However the goal of  
the project is broader and it is to provide a set of tools for people  
interested in processing of GSM signal in GNU Radio. For example -  
another possible applications of gr-gsm are GSM network monitor or  
frequency offset calibrator.

For people who want to see the application in action without installing  
it I’ve prepared a short video presentation:

[![](https://img.youtube.com/vi/Eofnb7zr8QE/maxresdefault.jpg "Sniffing GSM data with gr-gsm and cheap RTL-SDR receivers") ](https://www.youtube.com/watch?v=Eofnb7zr8QE)

If anyone is interested in developing something for/with use of the  
project I can provide help and information about the project’s internals  
by e-mail.

–  
Best Regards,  
Piotr K.
