可见光通信
计算机科学
光谱效率
调制(音乐)
传输(电信)
发射机
干扰(通信)
光学
带宽(计算)
符号间干扰
奈奎斯特-香农抽样定理
查阅表格
电子工程
通带
相位调制
电信
频道(广播)
物理
相位噪声
声学
带通滤波器
工程类
计算机视觉
发光二极管
程序设计语言
作者
Zhongxing Tian,Yi Cai,Lin Sun,XiaoBin Dong,Bin Xia,Hansheng Xu,Chenxu Jiang,Chaoran Xiong,Mingyi Gao,Ning Liu,Gangxiang Shen
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-11-15
卷期号:47 (23): 6069-6069
被引量:1
摘要
In this Letter, we propose a flexible bandwidth compression scheme for visible light communication (VLC) systems employing multi-band carrierless amplitude and phase (CAP) modulation. The scheme combines a narrow filtering for every subband at the transmitter and an N-symbol look-up-table (LUT) based maximum likelihood sequence estimation (MLSE) at the receiver. The N-symbol LUT is generated by recording pattern-dependent distortions induced by inter-symbol-interference (ISI), inter-band-interference (IBI), and the other channel effects upon the transmitted signal. The idea is experimentally demonstrated on a 1 m free space optical transmission platform. The results show that the proposed scheme can improve the subband overlap tolerance up to 42% in subband overlapping scenarios, that is, 3 bit/s/Hz, which is the highest spectral efficiency (SE) among the experimented schemes.
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