Lasers, Fiber Optics, and Communications

Channel estimation scheme based on compressed sensing and parameter estimation for an orthogonal frequency division multiplexing visible light communications system

[+] Author Affiliations
Jie Du, Xuewen Qian, Chaoyang Zhang

Central South University, School of Physics and Electronics, Lushan South Street, Changsha, Hunan Province 410083, China

Honggui Deng

Central South University, School of Physics and Electronics, Lushan South Street, Changsha, Hunan Province 410083, China

Guilin University of Electronic Technology, Guangxi Key Laboratory of Information Materials, Guilin, Guangxi Province 541004, China

Opt. Eng. 55(11), 116109 (Nov 22, 2016). doi:10.1117/1.OE.55.11.116109
History: Received September 9, 2016; Accepted October 31, 2016
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Abstract.  In order to mitigate bandwidth attenuation of diffusion link visible light communication systems caused by multipath effects, we present an optical orthogonal frequency division multiplexing channel estimation scheme based on compressed sensing (CS) and estimation of signal parameters via rotational invariance techniques (ESPRIT). First, we derived a parametric channel model. Then, we used ESPRIT to obtain multipath channel parameters. After that, we built a dynamic over-complete dictionary that can be used in CS processing. Finally, we reconstructed the channel response by using a basis pursuit denoising algorithm to equalize the received signal in frequency domain. Compared with traditional schemes, the proposed scheme can improve channel estimation accuracy without increasing dictionary size. A set of computer simulations demonstrated the effectiveness of the proposed scheme.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jie Du ; Honggui Deng ; Xuewen Qian and Chaoyang Zhang
"Channel estimation scheme based on compressed sensing and parameter estimation for an orthogonal frequency division multiplexing visible light communications system", Opt. Eng. 55(11), 116109 (Nov 22, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.116109


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