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[Discuss-gnuradio] Dealing with TX/RX cross-talk on USRP


From: Ken Adams
Subject: [Discuss-gnuradio] Dealing with TX/RX cross-talk on USRP
Date: Sat, 5 Apr 2014 13:01:28 -0700

I'm looking for tips on how to deal with the USRP TX/RX leakage. I'm transmitting with 30db (max) gain while trying to measure RSSI on the RX2 channel and experiencing about 40db of energy leakage from the TX/RX. My TX and RX chains are separated by 50MHz. Not sure how I can filter it out.

I'm thinking an antenna amp would work, so I could turn down the gain on the USRP; however, I want to try and avoid this.

Is there a fast way to switch between RX/TX channels? I did some quick tests with just turning off the TX channel flow graph, but the leakage takes a long time to dissipate.



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