Effect of user mobility under Rician fading on power allocation for non-orthogonal multiple access strategy
by Sandeep Singh Rana; Gaurav Verma; O.P. Sahu
International Journal of Communication Networks and Distributed Systems (IJCNDS), Vol. 30, No. 1, 2024

Abstract: Non-orthogonal multiple access (NOMA) has been envisaged as a promising technique to meet the demand for massive machine-type communication (mMTC) devices. However, designing a NOMA system required a proper comprehensive study of user mobility, user switching, and imperfect successive interference cancellation (Im-SIC). In this paper, the effect of user mobility and Rician fading channel on power allocation for non-orthogonal multiple access (PA-NOMA) strategy is thoroughly investigated. This paper also discusses the challenges faced during the power allocation to multiple NOMA users. Mobility of the users violates the basic channel gain conditions of the NOMA users, therefore, to maintain the fairness index of the individual cell edge users, dynamic power allocation strategy is adopted. Simulation results show that user mobility and Im-SIC have a significant effect on the PA-NOMA strategy for multiple users in terms of sum-rate capacity, average bit error rate, and fairness index.

Online publication date: Thu, 30-Nov-2023

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