Throughput analysis of dual-hop relaying energy harvesting network with TAS/MRC

In this paper, a dual-hop time-switching (TS) energy-harvesting scheme is investigated. The source and destination are multiple-antenna devices, while the relay is an energy-constrained single-antenna node that harvests RF energy from the source and assists the source-to-destination transmission. Transmit antenna selection/maximal ratio combining is applied to exploit diversity gain in both energy-harvesting phase and information-transmitting phase. In particular, we evaluate the scheme on two criteria: outage probability (P_out) and throughput (τ). The closed-form expressions of P_out and τ are derived and verified by the Monte-Carlo simulation. Our results show that the implementation of multiple antennas achieves significant improvement on the system performance.