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[Discuss-gnuradio] Simultaneous transmit and multichannel receive on USR
From: |
Young Lee |
Subject: |
[Discuss-gnuradio] Simultaneous transmit and multichannel receive on USRP1 |
Date: |
Mon, 28 Jun 2010 14:18:26 -0700 |
Hello everyone,
I was wondering if someone could either point me to an example or give
me some tips on how I can get setup gnuradio to do simultaneous
transmit and receive on multiple channels. At the moment, I just need
to transmit on one channel but need to receive on 4 independent
channels.
I am running gnuradio 3.2.2 on Ubuntu 9.04. I have a USRP-1 with 2
LFRX boards and 1 LFTX board.
Following the USRP code examples that came with gnuradio, what I've
been able to do successfully so far is:
--simultaneously transmit and receive on single channels.
--receive on 4 independent channels.
If I then take my working multi-channel receiver and just add a line
to create a transmitter sink object with usrp.sink_c(), all 4 receive
channels show sequences of alternating 0, -1 values instead of the
digitization of the signal that I'm putting into the input channels. I
don't have this problem if I modify my receiver to receive on just one
channel -- I can then transmit and receive simultaneously without
problems.
Any ideas on what I'm doing wrong here?
thanks
Young
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