摘要
针对光信号传输过程中产生的相位畸变及高误码率,提出了一种改进算法,通过设置误差容限,实现了LMS(最小均方)算法和CMA(恒模算法)在不同阈值条件下的切换应用。改进算法充分利用CMA收敛速度快及LMS算法稳态特性好的优点,使均衡后星座图中的星座点收敛速度快、相位点集中,信噪比高且稳定,其信号误码率为原来的五分之一。
In this paper, we propose an improved algorithm to solve the phase distortion and high bit error ratio problems during the signal transmission. Through setting the error threshold value, the algorithm can work between the CMA and LMS modes. The improved algorithm fully utilizes the faster convergence speed in CMA algorithm and LMS algorithm with good stability. The simulation results show that the proposed algorithm can increase the convergence speed of constellation points, concentrate the phase point, realize high and stable signal noise ratio high, and reduce the signal error rate to be 1/5 of the previous result.
作者
朱耀麟
关浩
柯熙政
ZHU Yao-lin GUAN Hao KE Xi-zheng(College of Electronic Information, Xi＇ an Polytechnic University, Xi＇ an 710048,China School of Automation and Information Engineering, Xi＇ an University of Technology, Xi＇ an 710048, China)
出处
《光通信研究》
北大核心
2016年第4期16-18,共3页
Study on Optical Communications
基金
国家自然科学基金资助项目(60977054)
陕西省教育厅自然专项资助项目(14JK1318)
