Robust Transceiver Design for SWIPT DF MIMO Relay Systems With Time-Switching Protocol

Abstract

In this paper, we investigate a dual-hop simultaneous wireless information and power transfer (SWIPT) decodeand-forward (DF) multiple-input multiple-output (MIMO) relay communication system in which the relay node harvests energy based on the radio frequency (RF) signal transmitted from the source node through the time-switching (TS) protocol to decode and forward the re-encoded information to the destination node. With consideration of the channel estimation error, the joint optimization of the TS factor, source and relay precoding matrices is proposed with robustness against the channel state information mismatch to maximize the mutual information (MI) between the source and destination nodes. We derive the optimal structure of the source and relay precoding matrices to simplify the transceiver optimization problem under fixed and flexible power constraints. Numerical examples demonstrate that the proposed algorithms with robustness provide better MI performance compared to the non-robust algorithm.

Outage Performance of Wireless Powered Decode-and-Forward Relaying Networks in Rician Fading

“…The reason for us to choose the TS receiver architecture is that compared with the PS model, the TS one is much simpler to be deployed in practice. Therefore, similar to many recent works [ 32 , 33 ], we consider the TS one in this paper.) receiving architecture to receive energy and information.…”

A Survey on Energy harvested Cooperative Communication System

“…they considered that both source and relay harvest energy from one hybrid access point. In [64], authors considered a dual hop SWIPT DF MIMO system with relay observing the TS protocol. they proposed combined optimiztion of TS factor and source and relay precoding matrices considering channel estimation error.…”