Adaptive frequency domain pre-equalization for white-LED nonlinearity in OFDM-based visible light communication systems  

作　　者：张汝岐 李建锋 黄治同 纪越峰 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications

出　　处：《Chinese Optics Letters》2015年第7期101-104,共4页中国光学快报（英文版）

基　　金：supported in part by the National 973 Program of China(No.2013CB329205);the National Natural Science Foundation of China(No.61401032);the National 863 Program of China(No.2013AA013601)

摘　　要：In visible light communication, orthogonal frequency division multiplexing （OFDM） is an effective approach to improve the system speed. However, the nonlinearity of the light-emitting diode （LED） suppresses the trans- mission performance. The low-frequency part of the transmitted signal from LED suffers more from nonlinearity. Therefore, a pre-equalization scheme which suppresses the low frequency part of the OFDM signal and enhances the high frequency part can decrease the impact of LED nonlinearity. The experimental results show that the bit-error rate performance is largely enhanced by the pre-compensation.In visible light communication, orthogonal frequency division multiplexing （OFDM） is an effective approach to improve the system speed. However, the nonlinearity of the light-emitting diode （LED） suppresses the trans- mission performance. The low-frequency part of the transmitted signal from LED suffers more from nonlinearity. Therefore, a pre-equalization scheme which suppresses the low frequency part of the OFDM signal and enhances the high frequency part can decrease the impact of LED nonlinearity. The experimental results show that the bit-error rate performance is largely enhanced by the pre-compensation.

关 键 词：Bit error rate Error compensation Frequency division multiplexing Frequency domain analysis LIGHT Optical communication Orthogonal frequency division multiplexing Visible light communication 

分 类 号：TN312.8[电子电信—物理电子学] TN929.1