Hi;Earlier mention of Polk,they at least made some effort in the direction of channel recognition.There radio has a built in scanner,and a system that won't go on if channel is in use.They have the synthesised channel system on both there receiver and transmitter.All this for $200.If they can make these advancements where are the others?Granted this won't cure the problems you mention but much better than the nothing the other companies are doing!