Hi Raj - Alice Crohas' MS thesis sounds similar to yours. She used 2
USRP1's, one doing RX-audio, and the other doing the RX-sample and the
TX-audio. We discussed trying to do simultaneous RX/TX using the same
daughtercard on a given USRP, or different daughtercards on the same
USRP, but decided against either for various reasons. Her eventual
setup used just two USRPs: two antennas and two daughtercards -- one
each per USRP. The RX-audio was not smooth (it had gaps where the TX-
audio was stopped to do RX-sample), but listening was not unpleasant;
with a little added buffering on RX, she could have made the RX-audio
smooth (but added in a small latency to the transmission, which for
the purposes of what she was doing would have been just fine) -- this
wasn't necessary for the MS, but it would have been nice for our
demos. Good luck on your projects. - MLD