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http://dx.doi.org/10.13067/JKIECS.2020.15.5.865

Improved BER Performance of Non-Orthogonal Multiple Access System for Interactive Mobile Users: Maximum Likelihood Detection Perspective  

Chung, Kyu-Hyuk (Dept. Software Science, Dankook University)
Publication Information
The Journal of the Korea institute of electronic communication sciences / v.15, no.5, 2020 , pp. 865-872 More about this Journal
Abstract
In the fifth generation (5G) mobile networks, non-orthogonal multiple access (: NOMA) has been considered as a promising technology, to increase the channel capacity. In NOMA, the multiple users share the channel resources and multiplex simultaneously. Recently, for the stronger channel user, it was reported that the bit-error rate (: BER) performance with interactive mobile users is degraded, compared to the BER of non-interactive users. In this paper, in order to improve such degraded BER performance, we propose the maximum-likelihood (: ML) receiver. First, the closed-form expression for the BER of the ML receiver is derived, and then it is shown that the BER of the ML receiver is improved, compared with the BER of the ideal perfect successive interference cancellation (: SIC) receiver. Additionally, based on the analytical expression, Monte Carlo simulations validates the above-mentioned results.
Keywords
NOMA; Superposition coding; SIC; Power Allocation; Correlation Coefficient;
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Times Cited By KSCI : 10  (Citation Analysis)
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