Reconfigurable intelligent surface aided coordinated multipoint transmission for the simultaneous wireless information and power transfer non‐orthogonal multiple access network. Issue 4 (17th December 2021)

• Record Type: Journal Article
• Authors: Sparjan, Romera Joan; Thirunavukkarasu, Manimekalai; Thangavelu, Laxmikandan
• Other Names: Cheng Xiaochun guestEditor.; Liu Zheli guestEditor.; Ning Yongsheng guestEditor.
• Is Part Of: Transactions on emerging telecommunications technologies. Volume 33:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-17
• Subjects: Telecommunication -- Periodicals; 384.05
• DOI: 10.1002/ett.4434
• Languages: English
• ISSNs: 2161-5748

Abstract

Abstract: We consider a reconfigurable intelligent surface (RIS) aided coordinated multipoint (CoMP) transmission to enhance the achievable rates of the cell edge users (CEUs) in a downlink non‐orthogonal multiple access (NOMA) network enabled with simultaneous wireless information and power transfer (SWIPT). The RIS‐enabled SWIPT‐CoMP‐NOMA network improves the spectral efficiency and counterbalances the rate trade‐off introduced by SWIPT. The distribution model of the effective channel gain plays a vital role in ergodic capacity and outage probability analysis. In this article, we approximate the effective channel gains of the CEUs using the inverse Gaussian (IG) function and validate its accuracy using the well‐known Kolmogorov–Smirnov distance (KSD) test. Using the proposed channel gain model, we derive closed‐form expressions for the ergodic rates and outage probabilities of the CEUs. Using Monte‐Carlo simulations, we confirm the accuracy of the derived analytical expressions and show that the proposed IG function is more accurate than the Gamma function in estimating the outage probability. We also found that the proposed system always offers a higher ergodic rate than the SWIPT‐CoMP‐NOMA system. Abstract : We consider a reconfigurable intelligent surface (RIS) aided coordinated multipoint (CoMP) transmission to enhance the achievable rates of the cell edge users (CEUs) in a downlink non‐orthogonal multiple access (NOMA) network enabled with simultaneous wireless information and power transfer (SWIPT). The RIS‐enabled SWIPT‐CoMP‐NOMA network improves the spectral efficiency and counterbalances the rate trade‐off introduced by SWIPT. We propose the inverse Gaussian (IG) function to model the effective channel gains and validate its accuracy using the KSD. We derive closed‐form expressions for the ergodic rates and outage probabilities of the CEUs and confirm their accuracy by Monte‐Carlo simulations.