Thanks... I appreciate the explanation. It's kind of what I thought. I still don't quite understand how I can cancel out the carrier. I have an incoming signal

Thanks... I appreciate the explanation. It's kind of what I thought. I still don't quite understand how I can cancel out the carrier. I have an incoming signal, that includes the backscatter. Do I average out the signal to get the carrier, use that averaged signal to cancel out the non-averaged signal - ending up with a version of the signal, and then apply a filter to this signal (to remove anything else that is causing weaker back scatter/multi-path interference), and hope that the intentional back scatter survives?