On 02/26/2016 07:00 AM, Alex Weihkopf wrote:
Hello,
I am using two USRP2 + WBX connected via cable on the TX/RX antenna
ports. I want to use them for my GNURadio OFDM-project in half-duplex
mode.
*Problem*: Whenever I send a data-packet (~10ms) on the TX-chain of
one USRP2, I receive the same packet on the RX-chain of the same
USRP2. The transmitter receives its own packets.
Why is that? Insufficient Decoupling between Receive and Transmit Circuit?
Does the USRP2 internally turn off the Receive Circuit when the
Transmit Circuit has data to send? Or does it just disconnect the
Receive Circuit from the antenna?
Is there a comprehensible GNURadio example for USRP2 + WBX
in half-duplex-mode?
Regards,
Alex
The RX chain is not disabled, only switched-away from the TX/RX
antenna. There's about 40+dB of isolation between the two sides,
but that still produces a fair amount of signal at the RX. The best
way forward is to simply ignore RX traffic while you're TXing.
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