基于DDC算法的可见光通信的非线性补偿技术

在可见光通信系统中,由于电子放大器和光学器件的非线性会降低系统的性能。为解决可见光通信系统的非线性问题,本文提出一种基于密度和距离(Densityanddistance-basedclustering,DDC)的算法,该算法利用调制星座点间的密度和不同簇间的距离,能准确地聚类出接收端非线性失真后的星座点位置。实验结果表明,相比传统的K-均值(K-means)算法,在可见光通信系统非线性较大时,本文提出DDC算法能更有效的解决可见光通信的非线性问题,具有更好的误码率性能。

Nonlinear Compensation Technology for Visible LightCommuni-Cation Based on DDC Algorithm

Nonlinearity of electronic amplifiers and optical devices.In order to solve the non-linear problem of visible light communication system,this paper proposes an algorithm based on Density and distance-based clustering(DDC),which can accurately cluster the position of the receiving end after nonlinear distortion by using the Density between modulated constellation points and the distance between different clusters.The experimental results show that,compared with the traditional k-means algorithm,DDC algorithm proposed in this paper can solve the nonlinear problem of visible light communication more effectively and has better bit error rate performance when the visible light communication system is relatively non-linear.