By default, a voting remote receiver system does that. Two of our remote receivers for our 2M repeater happen to be about 14 miles apart. I can hear the link transmitters from those sites and will often switch between the two to compare.
On a fixed-station user maybe more than 50-60 miles away, one of the sites may hear the user full quieting and the other noisy. 30 seconds later the situation could completely reverse. Mobiles are always heard with non-correlating fade patterns among the receivers (unless full-quieting of course) so the voter takes the best receiver on the fly and often sends a considerably better voted end-product to the transmitter than either receiver by itself. Laryn K8TVZ > BTW, nothing sez that 2m couldn't use diversity reception on repeaters. > Groundwave sigs suffer from multipath as well. On HF its tough to get enuf > antenna separation to give space diversity gain (a wavelength or two) but > easy above HF. > > --John WB0EQ
