The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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On Non-Orthogonal Multiple Access (NOMA) in 5G Systems

5G 시스템에서의 비-직교 다중 액세스(NOMA)

  • Received : 2015.09.07
  • Accepted : 2015.12.15
  • Published : 2015.12.30
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Abstract

The non-orthogonal multiple access (NOMA) is one of the fledging paradigms which next generation radio access technologies are sprouting toward. The NOMA with superposition coding (SC) in the transmitter and successive interference cancellation (SIC) at the receiver comes with many desirable features and benefits over orthogonal multiple access (OMA) such as orthogonal frequency division multiple access (OFDMA) adopted by Long-Term Evolution (LTE). In this paper, we study the recent research trends on NOMA in 5G systems. We discuss the basic concept of NOMA and explain its aspects of importance for future radio access. Then, we provide a survey of the state of the art in NOMA for 5G systems in a categorized manner. Further, we analyze the NOMA performances with numerical examples; and provide some avenues for future research on NOMA on a set of open issues and challenges.

NOMA는 차세대 유망한 무선 접속 기술 중 하나다. 중첩코딩(SC: superposition coding) 기술을 활용한 송신부와 순차적 간섭 제거(SIC: successive interference cancellation) 기술을 탑재한 수신부를 갖춘 NOMA는 다수의 바람직한 특징을 가지고 있으며, 기존의 LTE에서 채택하고 있는 직교 다중 접속(OMA) 방식인 직교 주파수 분할 다중(OFDMA)기술에 비해 장점을 가지고 있다. 본 논문에서는 5G 시스템에서의 NOMA에 관한 최근의 연구 동향을 분석하였다. 먼저, NOMA의 기본 개념을 논하고 장래 무선 기술 분야에서의 그 중요성을 진단하였다. 다음은, 5G 시스템에서의 NOMA에 대한 가장 최근의 주요 기술들을 분석하고, 다양한 항목별로 분류하여 제시하였다. 마지막으로 NOMA의 성능을 수치해석 결과를 통해 분석하고; NOMA의 현안과 난제에 기반하여 향후 해결해야 할 이슈들을 제시하였다.

Keywords

References

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