WindyCitySDR/gr-ofdm

Out-of-tree module for GNU Radio containing a complete OFDM implementation including GUI for reasearch and teaching

gr-ofdm GNU Radio module

Provides blocks and Python classes to build an OFDM transmitter and receiver for research and teaching purposes with dynamically configurable transmission parameters. Includes Python Qt based GUI for visualization.

Build requirements

In order to build the gr-ofdm module you will need to install the following prerequisites

• ZeroMQ including the C++ and Python bindings (http://zeromq.org/)
• UHD Driver for USRP hardware
• GNU Radio (http://gnuradio.org/)
• ITPP (http://itpp.sourceforge.net/)
• python-qwt5-qt4
• python-scipy

How to build

In the gr-ofdm folder do

mkdir build
cd build
cmake ../
make

optional

make install

How to run the apps

Assuming that the module has been compiled but not installed, in the gr-ofdm folder do

cd apps
./run_benchmark_gui.sh

to run the simulation or

./run_app.sh ../python/tx.py -f2.45G

And

./run_app.sh ../python/rx.py -f2.45G --disable-ctf-enhancer --scatterplot

to run the rf transmission. Then to oberserve everything in th graphical user interface:

./run_app.sh gui/ofdm_tx_gui.py

and

./run_app.sh gui/ofdm_rx_gui.py --tx-hostname=<hostname>

be careful with the frequency offset of you radio frontend. It might be necessary to apply a small manual correction of a few kHz.

Additional features:

Coding

./run_benchmark_gui.sh  --coding  --data-blocks=10

Adaptive OFDM

./run_benchmark_gui.sh --sinr-est --multipath

with USRPs and adaptive OFDM enabled

./run_usrp_tx_gui.sh --rx-hostname=<hostname or ip> -f 2.45G --tx-gain=<gain>
./run_usrp_rx_gui.sh --tx-hostname=<hostname or ip> -f 2.45G --sinr-est

Copyright information

Copyright © 2015 Institute for Theoretical Information Technology, RWTH Aachen University https://www.ti.rwth-aachen.de/

Unless otherwise stated, all files are distributed under GPL v3 license.