Improving efficiency of resource usage in two-hop full duplex relay systems based on resource sharing and interference cancellation

TLDR

The study proposes a full‑duplex relay system that more efficiently uses time and antenna resources. The system employs time‑ and antenna‑sharing with precoding and decoding to cancel interference and enhance achievable rate. Simulations demonstrate higher achievable rates and lower BER than half‑duplex and conventional full‑duplex relays.

Abstract

This letter presents a new full duplex relay (FDR) system that features more efficient use of time resource and antennas. The proposed FDR system is constructed based on time and antenna-sharing and elimination of underlying interference. The underlying interference caused by time- and antenna-sharing is eliminated using precoding. We propose a design for the precoder and decoder, and investigate the achievable rate of the proposed FDR system when the precoder and decoder are applied. Simulation results show improved achievable rate and BER performances with the proposed FDR system compared to half duplex and conventional full duplex relay systems.