Full-duplex and half-duplex: power efficiency comparison

The feasible power region for co-channel uplink and downlink users without channel state information is investigated in full-duplex (FD) communications. A closed-form expression for minimising the overall transmit power is derived in the high signal-to-noise case. It has been shown that FD has a better power efficiency than the traditional half-duplex communication when the residual self-interference is weak or the users are located near the base station.

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