Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Simple Power Allocation Scheme for Data Rate Fairness in NOMA Systems

비직교 다중 접속 시스템에서 전송률 공정성을 위한 단순한 전력 할당 기법

  • Lee, In-Ho (School of Electronic and Electrical Engineering, Hankyong National University)
  • Received : 2020.07.12
  • Accepted : 2020.07.24
  • Published : 2020.09.30
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Abstract

In this paper, we consider a downlink non-orthogonal multiple access system with a base station and N mobile stations, where we assume that instantaneous channel state information (CSI) is available at the base station. A power allocation scheme is proposed to achieve perfect fairness, which means equal data rates for all mobile stations. However, the power allocation scheme using full CSI requires high complexity. Hence, a simple power allocation scheme with low complexity is proposed by using high signal-to-noise power ratio (SNR) approximation. The simple power allocation scheme can achieve perfect fairness only for high SNR. However, it needs only the best CSI and the simple procedure to obtain power allocation coefficients. From simulation results, we show that the simple power allocation scheme provides remarkable fairness performance at high SNR.

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References

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