Performance of DF relaying wireless energy harvesting network with considering non-ideal circuit power

A decode-and-forward (DF) relaying wireless energy harvesting network, where the energy constrained relay uses the energy harvested from radio-frequency (RF) signals to forward data is considered in this paper. The relay collects energy and data through using time switching-based relaying (TSR) mechanism. For the delay-limited transmission mode, the outage probability is theoretically studied and a close-form expression of the outage probability is provided in the case of high SNR. Besides, the impacts of the relay circuit power on the system performance, i.e. the outage probability and the throughput, are investigated. Finally, numerical simulation results show that the existence of circuit power leads to the optimal energy harvesting time longer and the optimal throughput smaller.