典型载波恢复盲均衡算法比较研究  

Comparison of Blind Equalization Algorithms with Carrier Phase Recovery

作　　者：叶利民[1] 宁小玲 YE Limin;NING Xiaoling(Graduate School,Naval University of Engineering,Wuhan 430033;Academy of Weapons Engineering,Naval University of Engineering,Wuhan 430033)

机构地区：[1]海军工程大学研究生院,武汉430033 [2]海军工程大学兵器工程学院,武汉430033

出　　处：《舰船电子工程》2018年第10期53-57,共5页Ship Electronic Engineering

基　　金：国家自然科学基金(编号:61401493)资助

摘　　要：简述了盲均衡算法中两类常用算法的原理,采用混合相位信道模型、两种调制方式对两类基于判决反馈结构的各种算法的载波恢复性能进行了仿真比较,结果显示:具有相位纠正能力的常模类算法和超指数类算法具有更好的稳态误差性能和快速收敛性能,且这两类算法收敛后的稳态误差相当,但超指数类算法收敛速度更快;并在收敛稳定后采用判决误差准则切换至DD算法,切换后的算法提高了算法的稳定性,改善了稳态误差性能。The two common classes of blind equalization algorithms used in underwater acoustic communication are briefly in-troduced in this paper. The computer simulations of some representative blind algorithms using decision feedback equalizer（DFE）structure about carrier phase recovery ability are carried out under mixed phase underwater acoustic channels and respectively usingtwo modulation signals. The results show that the algorithms of constant module classes and super-exponential iteration classes withphase correcting ability have better steady-state mean square error and faster convergence rate,and the steady mean square errorsafter convergence of two kinds of algorithms are very close,but the super-exponential iteration classes have the faster convergencerate. Then,after steady convergence,decision directed algorithm is united based on judgement error switching criterion to increasethe robustness and steady-state error performance.

关 键 词：水声信道 盲均衡 载波恢复 判决反馈 稳态误差 

分 类 号：TN911.5[电子电信—通信与信息系统]