SDR (Software Defined Radio) » gr-gsm » OsmocomBB SDR PHY

h1. Software installation

The signal processing part is based on [[gr-gsm:]] project, which is represented by a set of "GNU Radio":https://www.gnuradio.org/ blocks for GSM. So, first of all you need to install "GNU Radio":https://www.gnuradio.org/ with compiled-in "UHD driver":http://files.ettus.com/manual/ support.

h2. 1. "UHD driver":http://files.ettus.com/manual/

Follow the "Installing and/or Building UHD" section of official project documentation. After the installation, make sure that your device is recognized properly:

<pre>

$ uhd_find_devices

$ uhd_usrp_probe

</pre>

h2. 2. "GNU Radio":https://www.gnuradio.org/

Follow the official documentation describing the process of "installing GNU Radio":https://wiki.gnuradio.org/index.php/InstallingGR.

Please note that despite "GNU Radio":https://www.gnuradio.org/ is available as a binary package on most Linux distributions, such binaries may be outdated. *Make sure the version you're installing is up to date!* It is also possible to "build GNU Radio from source":https://wiki.gnuradio.org/index.php/BuildGuide.

As soon as you have done, make sure you have at least the following components:

* python-support

* gr-digital

* gr-filter

* gr-blocks

* gr-uhd

You can use the following command to get build info:

<pre>

$ gnuradio-config-info --enabled-components

</pre>

h2. 3. [[Gr-gsm:]] transceiver

The transceiver implementation is a part of the master branch of [[gr-gsm:]] now. The information about installation process and list of dependences can be found in the [[gr-gsm:Installation|project's wiki]]. We also recommend to build it from source:

<pre>

# Get the source code

$ git clone git://git.osmocom.org/gr-gsm

$ cd gr-gsm/

# Configure and compile

$ mkdir build

$ cd build

$ cmake ..

$ make

# Install

$ sudo make install

$ sudo ldconfig

</pre>

The transceiver logic is represented by the following flow graph:

!grc_trx.png!

h2. 4. [[OsmocomBB:]]

You need to compile OsmocomBB with the [[OsmocomBB:TRX_Interface|TRX interface]] support. Please refer the corresponding [[OsmocomBB:TRX_Interface|wiki page]].