Efficient frequency-domain channel equalisation methods for OFDM visible light communications

被引：25

作者：

Lin, Bangjiang ^{[1
]}

Tang, Xuan ^{[1
]}

Ghassemlooy, Zabih ^{[2
]}

Zhang, Shihao ^{[1
]}

Li, Yiwei ^{[1
]}

Wu, Yi ^{[3
]}

Li, Hui ^{[3
]}

机构：

[1] Chinese Acad Sci, Haixi Inst, Quanzhou Inst Equipment Mfg, Beijing 100864, Fujian, Peoples R China

[2] Northumbria Univ, Fac Engn & Environm, Opt Commun Res Grp, NCRLab, Newcastle Upon Tyne, Tyne & Wear NE1 8ST, England

[3] Fujian Normal Univ, Minist Educ, Key Lab Optoelect Sci & Technol Med, Fuzhou, Fujian Province, Peoples R China

来源：

IET COMMUNICATIONS | 2017年 / 11卷 / 01期

基金：

美国国家科学基金会;

关键词：

TRANSMISSION; ARRANGEMENT; PILOT; LINK;

D O I：

10.1049/iet-com.2016.0787

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：

The authors present efficient frequency-domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16- and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in terms of the error vector magnitude but at the cost of high complexity. The authors show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.

引用

页码：25 / 29

页数：5

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