时间分集联合锁相环的新变步长盲均衡算法  

Time Diversity Combined with Phase-locked Loop New Variable Step-size Blind Equalization Algorithm

作　　者：胡江[1] 李迟生[1] 龙承志[1] 

机构地区：[1]南昌大学信息工程学院,江西南昌330031

出　　处：《电视技术》2015年第15期94-96,119,共4页Video Engineering

基　　金：国家自然科学基金项目(61362008)

摘　　要：提出一种联合锁相环的时间分集新型变步长盲均衡算法。该算法结合分集合并技术和变步长盲均衡算法的各自优点,在提高接收信号信噪比的同时,通过调整改进瑞利分段步长函数中的参数来加快算法的收敛速度,减小算法的均方误差和剩余码间干扰。此外,借助锁相环技术来对相位状态进行跟踪,对偏转的相位加以克服纠正。仿真结果表明新算法具有收敛速度快、可纠正相位旋转、稳态误差和剩余码间干扰小的优点。A new time diversity variable step-size blind equalization algorithm with phase-locked loop is proposed. The proposed algorithm combines the respective advantages of diversity combining technology and variable step-size blind equalization algo- rithms. It improves the signal to noise ratio of the received signal, meanwhile, accelerates the convergent rate and reduces the mean square error and the remaining symbol interference of the algorithm by adjusting the modified Rayleigh segmentation step function parameters. In addition, it traeks the phase state and corrects the deflection of phase by the phase-locked loop technology. The simulation results show that the new algorithm has the advantages of faster convergent rate, and could correct the phase ro- tation, the less steady-state error and remaining symbol interference.

关 键 词：短波信道 锁相环 自适应均衡 时间分集 

分 类 号：TN911.7[电子电信—通信与信息系统]