Abstract
The outage probability of a dual relay simultaneous wireless information and power transfer (SWIPT) system is investigated in the presence of Rayleigh fading. The message forwarding at the relays is categorized in three schemes. In the first two cases, both the relays are considered to be decode-and-forward (DF) and amplify-and-forward (AF), respectively, whereas in the third case, one of the relays is considered DF and the other as AF. The relaying model considers the source-relay-destination links whereas the direct link between source-destination does not exist. The power splitters at the relaying devices provide energy to the relays by splitting the received signal power into energy harvesting and information transfer parts. The outage probability is investigated using Monte-Carlo simulations and the results for all the three cases are compared. The all-AF forwarding scheme provides the least outage probability among all the three cases. The minimum outage probability is obtained for different values of PS factors for the said case at different transmit powers.