Rohit Gupta wrote: > Hi, > > We are working on using GNURadio for using it as RF node capable of > 2*2/4*4 MIMO. All the RF nodes are connected to very big FPGA like the > one used in "Berkeley Emulation Engine (BEE)" using "Infiniband" > Optical Fiber. All the signal processing is implemented in "BEE" > hardware. We wanted to replace USB with Infiniband so that we can send > raw ADC/DAC samples to/from BEE processing engine. It would be very > helpful if some body could give us pointers on how to do this so that > we can reuse most of the design of GNUradio board. > > Also, I have come across some people using two GNURadio boards for 4*4 > MIMO. Is there a document which describes how to synchronize the LOs > of two GNURadio boards for coherent MIMO processing and program two > GNURadio boards for 4*4 MIMO?? Read this document, it should explain it: gnuradio-examples/python/multi_usrp/README
(online available as http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-examples/python/multi_usrp/README ) Also read: http://gnuradio.org/trac/wiki/USRPClockingNotes Make sure you understand the hardware requirements, have the right cables, and set the usrp clock input and output accordingly. I wrote the code to enable this and have experience in using it. I you have any questions or problems getting it to work feel free to ask. Greetings, Martin > > Thanks, > Rohit > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
