Communications and Networking. 11th EAI International Conference, ChinaCom 2016, Chongqing, China, September 24-26, 2016, Proceedings, Part I

Research Article

Rate-Splitting Non-orthogonal Multiple Access: Practical Design and Performance Optimization

  • @INPROCEEDINGS{10.1007/978-3-319-66625-9_34,
        author={Xinrui Huang and Kai Niu and Zhongwei Si and Zhiqiang He and Chao Dong},
        title={Rate-Splitting Non-orthogonal Multiple Access: Practical Design and Performance Optimization},
        proceedings={Communications and Networking. 11th EAI International Conference, ChinaCom 2016, Chongqing, China, September 24-26, 2016, Proceedings, Part I},
        proceedings_a={CHINACOM},
        year={2017},
        month={10},
        keywords={Rate-splitting Non-orthogonal multiple access MCS selection Spectrum efficiency User flexibility},
        doi={10.1007/978-3-319-66625-9_34}
    }
    
  • Xinrui Huang
    Kai Niu
    Zhongwei Si
    Zhiqiang He
    Chao Dong
    Year: 2017
    Rate-Splitting Non-orthogonal Multiple Access: Practical Design and Performance Optimization
    CHINACOM
    Springer
    DOI: 10.1007/978-3-319-66625-9_34
Xinrui Huang1,*, Kai Niu1,*, Zhongwei Si1,*, Zhiqiang He1,*, Chao Dong1,*
  • 1: Beijing University of Posts and Telecommunications
*Contact email: hxr728@bupt.edu.cn, niukai@bupt.edu.cn, sizhongwei@bupt.edu.cn, hezq@bupt.edu.cn, dongchao@bupt.edu.cn

Abstract

In this paper we propose a novel rate-splitting non-orthogonal multiple access (RS-NOMA) scheme implemented in power-domain for practical scenarios in 5G mobile communication systems. The proposed scheme is exploited to solve the mismatch between Quality-of-Service (QoS) and channel conditions of users via rate-splitting instead of power reallocation as the conventional NOMA does. The RS-NOMA scheme contributes to both system spectrum efficiency and user flexibility on resource allocation. We investigate the signal-to-noise ratio (SNR) region division for the proposed scheme and then a splitting factor optimizing algorithm to enable the system achieving the maximum throughput. Simulation results show that the RS-NOMA scheme significantly improves the user flexibility with almost no loss to the system spectrum efficiency.