Error rate analysis of full-duplex relaying

Most of the existing literature on wireless relaying has adopted the half-duplex (HD) protocol, where the transmission between source and destination is realized in two time frames, corresponding to source-relay and relay-destination transmission intervals, respectively. Contrarily, the full-duplex protocol offers higher capacity by letting the relay transmit and receive simultaneously in the same frequency band. In this work, we conduct a bit error rate (BER) analysis of a full-duplex relaying scheme that employs binary phase shift keying (BPSK) and a single decode-and-forward relay. The derived closed-form expression gives insight into the BER performance, demostrating inferior performance as compared to the HD protocol, as well as zero diversity order due to the existence of self-interference at the relay and destination.