Full-Duplex Relay based on Zero-Forcing Beamforming

TL;DR

This paper introduces a full-duplex relay system utilizing zero-forcing beamforming to suppress interference, significantly improving sum rate performance over traditional half-duplex relays when antenna isolation is adequate.

Contribution

It presents a novel full-duplex relay design based on zero-forcing beamforming that effectively suppresses interference in multiuser MIMO systems.

Findings

Enhanced sum rate performance compared to half-duplex relays

Effective suppression of self-interference and multiuser interference

Performance depends on antenna isolation at the relay

Abstract

In this paper, we propose a full-duplex relay (FDR) based on a zero-forcing beamforming (ZFBF) for a multiuser MIMO relay system. The ZFBF is employed at the base station to suppress both the self-interference of the relay and the multiuser interference at the same time. Numerical results show that the proposed FDR can enhance the sum rate performance as compared to the half-duplex relay (HDR), if sufficient isolation between the transmit and receive antennas is ensured at the relay.