You mean like....ALL REPEATERS?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?
NOPE?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?
With DMR, you can set up a single frequency repeater, where one timeslot receives and the other transmits. Only one frequency needed, and no duplexer.