Performance Analysis of RIS-Assisted Wireless Communications With Energy Harvesting

In this paper, we investigate a reconfigurable intelligent surface (RIS)-assisted wireless communication system with energy harvesting. In the single information user (IU) scenario, we consider the power control of base station (BS) and the random deployment of energy users (EUs). To this end, we first characterize the statistical features of the channel gains over BS-RIS-IU and BS-RIS-EU cascaded links. Then, we derive a closed-form expression of the information outage probability (IOP) of the IU and show an upper bound of the energy outage probability (EOP) of EUs by invoking the Jensen's inequality. Furthermore, we consider two more general extensions, namely, the existence of imperfect phase alignment and multiple IUs. Finally, the correctness of the analysis results is verified by Monte-Carlo simulation.

Automated summary

In this paper, a RIS-assisted wireless communication system with energy harvesting is investigated. The power control of the base station and the random deployment of energy users are considered in the single information user scenario. Statistical features of the channel gains over the BS-RIS-IU and BS-RIS-EU cascaded links are characterized, and closed-form expressions for the information outage probability (IOP) of the IU and the upper bound for the energy outage probability (EOP) of EUs are derived. The analysis is further extended to include imperfect phase alignment and multiple IUs, and the correctness of the results is verified by Monte-Carlo simulation.