Performance-enhanced NOMA-VLC using subcarrier pairwise coding

OPTICS COMMUNICATIONS

卷:450

Article

Shi, Jin¹  Hong, Yang^2,3  He, Jing¹  Chen, Lian-Kuan² 

[1] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China

[2] Chinese Univ Hong Kong, Dept Informat Engn, Hong Kong, Peoples R China

[3] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

关键词: Visible light communications (VLC);    Non-orthogonal multiple access (NOMA);    Optical communications;    Pairwise coding;   

DOI  :  10.1016/j.optcom.2019.05.067

来源: Elsevier

【 摘 要 】

To alleviate the error propagation issue of non-orthogonal multiple access (NOMA) based visible light communication (VLC) systems, we propose and experimentally demonstrate the subcarrier pairwise coding (PWC) based NOMA-VLC. Without extra coding overhead, the computation-efficient subcarrier PWC can significantly improve the overall system performance by pairing the subcarriers of high signal-to-noise ratios (SNRs) with those of low SNRs. Under different transmitted baud rate from 150 MSa/s to 225 MSa/s, the bit error rate (BER) performance with and without PWC is investigated in a NOMA-VLC system. Experimental results show that with the optimized power ratio between the NOMA users, up to 3.3-dB Q(2)-factor improvement can be achieved by the proposed scheme.

【 授权许可】

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