Ergodic Capacity Analysis of RIS-aided System Relying on User Grouping and Fixed Power Allocation

Umamaheswari Kaveti,Fazal-E-Asim,Do Dinh-Thuan

Advances in Communication, Devices and Networking（2022）

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Abstract

In this paper, we focus on the ergodic capacity of RIS-assisted NOMA in wireless communication systems. The closed upper bound of ergodic capacity analysis is obtained for the proposed technique by using both Rayleigh and Rician fading channel environments for multiple users. Compared to simulations, numerical results demonstrate the tightness and effectiveness of our closed-form expressions.

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Key words

Ergodic capacity, Reconfigurable intelligent surface (RIS), Non-orthogonal multiple access (NOMA), Rayleigh fading channel, Rician fading channel

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