Performance Analysis for Hybrid AF Relaying Protocol in SWIPT Systems with Direct Link

Abstract

This paper studies the outage performance of the hybrid amplify-and-forward (AF) relaying protocol in simultaneous wireless information and power transfer (SWIPT) systems with direct link. In the hybrid power-time switching based relaying (HPTSR), the block time T is divided into two parts. One is used for energy harvesting and information processing, and the other is used for information transmission from relay to destination node. During the part of energy harvesting and information processing, one portion of the received signal is used for energy harvesting (EH) and the other portion of the received signal is used for information processing. An analytical expressions for outage probability is derived in the hybrid AF-based relay network. Our numerical results verify our analytical expressions and shows that the proposed system performance of the hybrid protocol in the presence of the direct link outperforms the hybrid protocol without direct link.