On the performance of wireless-powered cooperative DF relaying networks with imperfect CSI

Abstract

This paper studies several performance metrics of a wireless-powered de-code-and-forward (DF) relay network with imperfect channel state information (CSI). In particular, based on the time switching (TS) protocol, the energy-constrained relay harvesting energy from a power beacon (PB), and uses that harvested energy to forward the source information to destination. The closed-form expression of the outage probability is firstly derived over Rayleigh fading channels. Then, the asymptotic analysis, throughput as well as the symbol error probability (SEP) are derived based on the expression of the outage probability. Next, both transmission power of the source and the power beacon are optimized through the throughput optimization. Finally, simulations are conducted to corroborate our theoretical analysis, and to reveal the impact of the transmission power of the source and PB as well as the imperfect CSI on the system performance.