A modified time-switching relaying protocol for multi-destination relay networks with SWIPT

In this paper, we propose a modified time-switching relaying (TSR) protocol for dual-hop relay networks with simultaneous wireless information and power transfer (SWIPT) technique. We study the outage performance of the proposed TSR protocol and compare it with the conventional TSR and power-splitting relaying (PSR) protocols. A unified analytical expression is derived for the outage probability, in addition to studying the performance at high signal-to-noise ratio (SNR) values where a unified approximate expression for the outage probability is provided and analyzed in terms of diversity order and coding gain. The results show that the proposed TSR protocol outperforms the conventional TSR protocol existing in literature. Also, findings illustrate that applying the SWIPT technique in multi-destination relay networks results in a unity diversity order.