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http://dx.doi.org/10.6109/jkiice.2019.23.9.1117

Power Allocation to Improve Data-Rate Fairness of Non-orthogonal Multiple Access Users  

Lee, In-Ho (Department of Electrical, Electronic and Control Engineering, Hankyong National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.23, no.9, 2019 , pp. 1117-1122 More about this Journal
Abstract
In this paper, a power allocation scheme is proposed to improve the fairness of user data rates in downlink non-orthogonal multiple access systems with one base station and two users. In particular, the power allocation scheme is presented to maximize the fairness of average user data rates assuming independent Rayleigh fading channels, where the fairness maximization is achieved when the average user data rates are equal. For the fairness evaluation, hence approximate expressions for the average user data rates and the average sum date rate of the proposed scheme are provided by using high signal-to-noise ratio approximation. Through simulation investigation, the derived approximate expressions for the average data rates are verified, and it is shown that the proposed scheme is superior to the conventional power allocation schemes in terms of the fairness of the average user data rates.
Keywords
Data-rate fairness; Non-orthogonal multiple access; Power allocation coefficient; Sum data rate;
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Times Cited By KSCI : 1  (Citation Analysis)
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