Orthogonal Polynomial-Based Nonlinearity Modeling and Mitigation for LED Communications

IEEE Photonics Journal

Pingjuan Niu¹  Qinghua Guo²  Jiangtao Xi²  Weikang Zhao²  Yanguang Yu²  Jun Tong²  Xiaohong Sun³ 

[1] Tianjin Polytechnic University, Tianjin, China;University of Wollongong, Wollongong, Australia;Zhengzhou University, Zhengzhou, China;

关键词: Light-emitting diode (LED) communications;    nonlinearity;    memory polynomial;    orthogonal polynomial;   

DOI  :  10.1109/JPHOT.2016.2581485

来源: DOAJ

【 摘 要 】

The light-emitting diode (LED) is the major source of nonlinearity in LED communications, and the nonlinearity needs to be effectively modeled and thereby mitigated through predistortion or postdistortion to avoid degradation of communication performance. A memory polynomial is often used for LED nonlinearity modeling and mitigation in the literature. However, the estimation of memory polynomial coefficients suffers from numerical instability, resulting in inaccurate modeling and poor performance in nonlinearity mitigation. In this paper, we propose an orthogonal polynomial-based nonlinearity modeling and mitigation technique for LED communications with pulse amplitude modulation (PAM) signaling and show that the proposed technique significantly outperforms the conventional memory polynomial-based techniques.

【 授权许可】

Unknown