Abstract
The commercialization of future wireless communication systems faces crucial problems in terms of reduced network cost of deployment and high power consumption. As a result, reconfigurable intelligent surfaces (RIS) have been suggested as a promising approach to overcome these existing challenges. In this paper, the performance of RIS in a wireless-powered interference-limited communication network is investigated. In this network, an energy-constrained access point (AP) is powered by a dedicated multiantenna power beacon (PB) and communicates to a destination limited-interference node via the RIS. It is assumed that the RIS experiences generalized-K fading distribution while the PB and interferers links are subjected to Nakagami-m fading distributions. To evaluate the system performance, the analytical closed-form expression of the probability distribution function (PDF) for the concerned system is derived. Through this, the exact closed-form expressions of the systems outage probability, average delay-tolerance throughput and average bit error rate are obtained. The analysis quantifies the effects of the number of reflecting elements in the RIS, number of interferer nodes, fading parameters on the AP and interferer links and number of antennas on the PB. It is deduced from the results that there is a kind of symmetry relationship between the analytical and simulation results. Additionally, the results illustrate that the proposed system with an RIS outperforms the conventional system without an RIS. Finally, the accuracy of the derived analytical expressions is validated through a Monte-Carlo simulation.
Highlights
The numerical results are presented to evaluate the impact of various system and channel parameters on the performance of reconfigurable intelligent surfaces (RIS) in an interference-limited wireless powered communication network
It can be observed that the Monte-Carlo simulation results are perfectly matched with the analytical results, which indicate the correctness of the derived closed-form expressions
The impact of the number of reflecting elements in the RIS on the system outage probability is demonstrated. It can be observed from the results that the increase in number of reflecting elements in the RIS significantly improves the system outage performance with large values of N offering better performance
Summary
Reconfigurable intelligent surfaces (RIS) have emerged as a new innovative technology in the research community due to its great potential for reconfiguring propagation environments and enhancing the quality of signal reception [1]. It requires no additional power supply, complex encoding or decoding operation to enhance the system’s performance [3,4]. In this case, the RIS concept is based on the utilization of large number of small, low-cost and passive reflecting elements to effectively control the propagation characteristics of the desired incident signal through the adjustable amplitude and phase shift of each reflecting element with no signal processing [4]. The performance of both approaches has been studied in literature in the context of cooperative relaying systems
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
