That would take us back to how far apart the antennas needed to be.
It could be anything from twisted pair to microwave.
Ok Don, from what I have found out the antennas if on the same tower, need to be vertically separated by a minimum of 100 feet at vhf, agree or not?
If horizontally separated something on an order of a half mile, agree or not?
If the receive antennas are a half mile minimum from the transmit antenna, then twisted pair would be real pricey, so that is not an option grantend I said if cost was not a factor, but at least be realistic.
Ok a uhf "link" would work ok, if you had a data channel, and a voice channel, yea you could do a digital thing and combine the two onto one channel, which would be a good option, agree of not?
I have been thinking about this the past few days this is the basic concept I have come up with. Now if one was really into making a concept like this work, he would also have a electronically, controlled antenna system at the transmit site, that would "rotate" as needed to provide the best signal for the user,so say in a 4 point system E,W,N,S the receiver on the south hears the better signal, and selects the south direction on the transmit antenna array, and then goes into "normal" repeater mode. that is my take on the idea.