Lasers, Fiber Optics, and Communications

Polarity separating optical orthogonal frequency division multiplexing for free-space visible light communications

[+] Author Affiliations
Jianfeng Li, Jianke Li, Xiaoshuang Liu

Hebei University of Economics and Business, Information Technology College, Shijiazhuang, China

Zhitong Huang

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing, China

Opt. Eng. 56(2), 026118 (Feb 23, 2017). doi:10.1117/1.OE.56.2.026118
History: Received September 10, 2016; Accepted February 6, 2017
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Abstract.  A modulation format, polarity separating optical orthogonal frequency division multiplexing (PSO-OFDM), is proposed to mitigate the light-emitting diode (LED) nonlinearity for visible light communication systems. A polarity separator is used to divide the OFDM signal in time domain x(t) into two parts: x+(t) and x(t), which will be transmitted parallelly from the different LEDs and overlap linearly in free space to realize PSO-OFDM. The experimental results demonstrate that PSO-OFDM has high spectral efficiency and suffers less nonlinear distortions than other methods. Employing PSO-OFDM, the modulation index and bit error rate performance can be significantly enhanced.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Jianfeng Li ; Zhitong Huang ; Jianke Li and Xiaoshuang Liu
"Polarity separating optical orthogonal frequency division multiplexing for free-space visible light communications", Opt. Eng. 56(2), 026118 (Feb 23, 2017). ; http://dx.doi.org/10.1117/1.OE.56.2.026118


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