> Ali Siddiqi wrote: > > > > Hi, > > Did the flowgraph of the code (in which you added the timeout) involved > > receive_path??? > > > > Regards, > > Ali > > > > On Mon, Aug 3, 2009 at 11:21 AM, Dan Rosenqvist <da...@kth.se> wrote: > > > >> > >> > >> > >> Umair Nasir wrote: > >> > > >> > Hi all, > >> > > >> > This question is asked a number of times. And I believe it shouldn't be > >> > that > >> > tough. Somebody explain where to put this logic in benchmark_rx.py > >> > > >> > If no data received > >> > set freq to freq number 2 > >> > else > >> > stay on the current freq > >> > > >> > > >> > Waiting for a response. > >> > > >> > > >> > > >> > > >> > > >> > > >> > -- > >> > Umair > >> > > >> > _______________________________________________ > >> > Discuss-gnuradio mailing list > >> > Discuss-gnuradio@gnu.org > >> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >> > > >> > > >>
We have a project here at Virginia Tech where we modified the benchmark example to perform spectrum sensing and essentially add a dynamic spectrum access component to it. The primary goal was to integrate this gnuradio script with CROSS, our open source cognitive engine, in order to have CROSS select the channel based on previous experience. However, we also have the option to run it without CROSS and select a channel randomly if a primary user is detected. Check out the README for more info on how to do this. It's a good basic script for figuring out how to do simple spectrum sensing(probe)/transmission/reception all in one flowgraph. The benchmark script needs to be copied into gnuradio-examples/python/digital/ in order for it to function properly. Basically if you have 2 nodes running this script they will rendezvous and start exchanging bits. If another signal comes into the same channel they will move to another channel. The channels are hard coded in right now. benchmark_dsa.py script: https://cornet.wireless.vt.edu/trac/browser/vtcross/trunk/src/cognitive_ engines/DSA_CE/examples/gnuradio-examples General Info about the cognitive engine: https://cornet.wireless.vt.edu/trac/wiki/Cross Tim ------------------------------------------- Timothy R. Newman, Ph.D. Wireless @ Virginia Tech 447 Durham Hall Blacksburg, VA 24061 Phone: 540-231-2041 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
