Dual intelligent reflecting surfaces aided decode‐and‐forward relaying with wireless power transfer

Abstract

AbstractWe consider an energy harvesting (EH)‐based cooperative relaying system, where the relay operates with EH and forwards source data to the destination according to the decode‐and‐forward protocol. Two intelligent reflecting surfaces (IRSs) are deployed to assist the EH of the first‐hop as well as the data transmissions of both hops. Along with the source transmitting data to the relay at the first‐hop, the first IRS reflects the incident signal to the relay, who can harvest energy and decode information from the received signal using power‐splitting or time‐switching method. After successfully decoding the source data, the relay will forward data to the destination by using the harvested energy with assistance from the second IRS. We analyze and derive the success probability, the throughput, and the ergodic capacity of the proposed scheme. Numerical results show that our proposed dual‐IRS‐aided relaying scheme can achieve much better performance than relay‐only and one‐IRS‐aided relaying schemes.