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

被引：8
|
作者：
Liu, Xiaoshuang [1 ]
Li, Jianfeng [1 ]
Yahao, Ren [1 ]
Huang, Zhitong [2 ]
机构：
[1] Hebei Univ Econ & Business, Informat Technol Coll, Shijiazhuang 050061, Hebei, Peoples R China
[2] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2021年 / 13卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Receivers; Signal to noise ratio; Gain; Diversity reception; Optical transmitters; Optical receivers; OFDM; Visible light communication; asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM); iterative receiver; pairwise maximum likelihood;
D O I：
10.1109/JPHOT.2021.3065213
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
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 similar to 2.7 dB for 7% forward error correction (FEC) limit. The proposed iterative receiver gives a SNR gain of 2.6 similar to 2.9 dB with 7% FEC limit.
引用
收藏
页数：8
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