Buffer-Aided Relaying For The Two-Hop Full-Duplex Relay Channel With Self-Interference

摘要

In this paper, we investigate the two-hop full-duplex (FD) relay channel withself-interference and fading, which is comprised of a source, an FD relay, anda destination, where a direct source-destination link does not exist and the FDrelay is impaired by self-interference. For this channel, we propose threebuffer-aided relaying schemes with adaptive reception-transmission at the FDrelay for the cases when the source and the relay both perform adaptive-powerallocation, fixed-power allocation, and fixed-rate transmission, respectively.The proposed buffer-aided relaying schemes significantly improve the achievablerate and the throughput of the considered relay channel by enabling the FDrelay to adaptively select to either receive, transmit, or simultaneouslyreceive and transmit in a given time slot based on the qualities of thereceiving, transmitting, and self-interference channels. Our numerical resultsshow that significant performance gains are achieved using the proposedbuffer-aided relaying schemes compared to conventional FD relaying, where theFD relay is forced to always simultaneously receive and transmit, and tobuffer-aided half-duplex relaying, where the half-duplex relay cannotsimultaneously receive and transmit.