Iterative Pairwise Maximum Likelihood Receiver for ACO-OFDM in Visible Light Communications

IEEE Photonics Journal

卷:13

Jianfeng Li¹  Xiaoshuang Liu¹  Ren Yahao¹  Zhitong Huang² 

[1] Information Technology College, Hebei University of Economics and Business, Shijiazhuang, China;

[2] State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China;

关键词: Visible light communication;    asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM);    iterative receiver;    pairwise maximum likelihood;   

DOI  :  10.1109/JPHOT.2021.3065213

来源: DOAJ

【 摘 要 】

An iterative pairwise maximum likelihood (ML) receiver is proposed for asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) in visible light communications (VLC). With the aid of the pairwise ML detection, half of the received ACO-OFDM samples are forced to zero in time domain. However, when the signal-to-noise ratio (SNR) is low, the pairwise ML detection may cause misjudgment. With the iterative pairwise ML detection, the ACO-OFDM symbols are detected in frequency domain and the SNR gain of 3 dB could be available. Simulation results show that the pairwise ML receiver without iteration provides the SNR improvement of 1.5∼2.7 dB for 7% forward error correction (FEC) limit. The proposed iterative receiver gives a SNR gain of 2.6∼2.9 dB with 7% FEC limit.

【 授权许可】

Unknown