Joint Beamforming Optimization and Power Control for Full-Duplex MIMO Two-way Relay Channel

Abstract

In this paper we explore the use of full-duplex radio to improve the spectrum efficiency in a two-way relay channel where two sources exchange information through an multi-antenna relay, and all nodes work in the full-duplex mode. The full-duplex operation can reduce the overall communication to only one phase but suffers from the self-interference. Instead of purely suppressing the self-interference, we aim to maximize the end-to-end performance by jointly optimizing the beamforming matrix at the relay which uses the amplify-and-forward protocol as well as the power control at the sources. To be specific, we propose iterative algorithms and 1-D search to solve two problems: finding the achievable rate region and maximizing the sum rate. At each iteration, either the analytical solution or convex formulation is obtained. We compare the proposed full-duplex two-way relaying with the conventional half-duplex two-way relaying, a full-duplex one-way relaying and a performance upper bound. Numerical results show that the proposed full-duplex scheme significantly improves the achievable data rates over the conventional scheme.

11 pages, 11 figures, accepted in The IEEE Transactions on Signal Processing

Cited by in corpus (7)

• Joint Source-Relay Design for Full--Duplex MIMO AF Relay Systems
• Physical Layer Security in MIMO Backscatter Wireless Systems
• Sum Secrecy Rate Maximization for Full-Duplex Two-Way Relay Networks Using Alamouti-based Rank-Two Beamforming
• Joint Relay-User Beamforming Design in Full-Duplex Two-Way Relay Channel
• Technical Report: Outage Performance of Full-Duplex MIMO DF Relaying using Zero-Forcing Beamforming
• Destination-aided Wireless Power Transfer in Energy-limited Cognitive Relay Systems
• Performance Analysis for Training-Based Multi-Pair Two-Way Full-Duplex Relaying with Massive Antennas