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
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.