In decode and forward relay systems, choosing the duplex mode is an important factor to the performance. To satisfy the performance requirement, self-interference must be mitigated for the full-duplex relay (FDR), and the resource efficiency must be increased for the half-duplex ratio (HDR). Therefore, if a wise scheme to consider these two factors exists, decode and forward relay systems are used more effectively.This study proposes a new duplex selection scheme for decode and forward relay systems. The proposed duplex selection scheme chooses the better duplex mode according to the channel statistical conditions with optimal power allocation.The simulation results show that the proposed duplex scheme with optimal power allocation has lower outage probability than the FDR and the HDR.
duplex mode; optimal power allocation; full-duplex
KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS