Dear all,
the OOT module gr-cdma that we have been working on with Zhe F. is now
ready (also fully documented). You can find it here:
An important acknowledgement:
this project grew out of the DARPA SPECTRUM CHALLENGE:
our team eventually dropped out of the race because of other time
commitments but I and Zhe decided to finish up the design and make it
publicly available since DARPA was generous enough to send us USRPs for
testing etc.
I am looking forward to feedback from the community and to ideas for
expanding/improving the design.
=======================================
For the impatient:
- Download gr-cdma from github
git clone GitHub - anastas/gr-cdma: a cdma physical layer for Gnuradio
- Build the package
mkdir build_cdma
cd build_cdma
cmake -DENABLE_DOXYGEN=ON …/gr-cdma
make
sudo make install
sudo ldconfig
- compile hierarchical blocks and play with built in app
cd gr-cdma/apps
gnuradio-companion &
In the gnuradio-companion environment
– Load the hier block “amp_var_est_hier.grc”, “cdma_tx_hier.grc”,
“chopper_correlator1.grc”, “cdma_rx_hier.grc” and compile them
making sure to reload blocks after each compilation
– Load the application “cdma_txrx.grc” and have fun
Experiment with manual acq/tra, auto acq/tra, changing freq and
timing
offset, SNR, etc
– If you have 2 USRPs load the cdma_tx.grc and cdma_rx.grc and enjoy
real-time
CDMA transmission. You can also use the cdma_tx.grc and cdma_rx.grc by
writting
and reading to a fifo (first do > makefifo /tmp/cdma.fifo)
=====================================
best,
Achilleas