Joint Transmit Power and Relay Two-Way Beamforming Optimization for Energy-Harvesting Full-Duplex Communications

TL;DR

This paper proposes an iterative optimization algorithm for joint transmit power, relay beamforming, and receiver power splitting in full-duplex MIMO relay systems to maximize sum-rate in SWIPT networks.

Contribution

It introduces a novel iterative algorithm based on DC programming and one-dimensional search for joint optimization in FD MIMO relay systems.

Findings

The proposed algorithm effectively improves sum-rate performance.

Simulation results validate the algorithm's efficiency and effectiveness.

Abstract

This paper studies the joint optimization problem of two-way relay beamforming, the receiver power splitting (PS) ratio as well as the transmit power at the sources to maximize the achievable sum-rate of a simultaneous wireless information and power transfer (SWIPT) system with a full-duplex (FD) multiple-input multiple-output (MIMO) amplify and forward (AF) relay, assuming perfect channel state information (CSI). In particular, our contribution is an iterative algorithm based on the difference of convex programming (DC) and one dimensional searching to achieve the joint solution. Simulation results are provided to demonstrate the effectiveness of the proposed algorithm.