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

Jianfeng Li; Zhitong Huang; Jianke Li; Xiaoshuang Liu

doi:10.1117/1.OE.56.2.026118

23 February 2017 Polarity separating optical orthogonal frequency division multiplexing for free-space visible light communications

Jianfeng Li, Zhitong Huang, Jianke Li, Xiaoshuang Liu

Author Affiliations +

Optical Engineering, Vol. 56, Issue 2, 026118 (February 2017). https://doi.org/10.1117/1.OE.56.2.026118

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.

Citation Download Citation

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

Received: 10 September 2016; Accepted: 6 February 2017; Published: 23 February 2017

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