tom wrote:

http://www.theregister.co.uk/2011/02...radio_signals/

tom
K0TAR

Been done.
Adaptive cancelers for co-site interference have been around for
decades. A friend of mine used to work for American Nucleonics Corp
(there's a company name from the 50s, eh) in the 80s, when they were
transitioning from totally analog cancelers to digitally controlled
cancelers (with the canceling still done in analog, with a second antenna)
The idea of two transmitting antennas forming an adaptively canceled
null at the receiver has certainly been mentioned in the literature.