正交复用QAM系统的定时和载波相位跟踪新算法  

A New Algorithm for Tracking Timing and Carrier Phase in Orthogonally Multiplexed QAM System

作　　者：周毅[1] 朱雪龙[1] 

机构地区：[1]清华大学电子工程系

出　　处：《通信学报》1997年第1期1-7,共7页Journal on Communications

摘　　要：在数字信号传输系统中，正交复用ＱＡＭ（ＯＭＱＡＭ）是目前最有效的一种抗信道失真传输技术，但它对系统的定时偏移和载波相位误差非常敏感。本文基于高阶累积量技术，导出了一种新的ＯＭＱＡＭ系统定时和载波相位的跟踪算法。计算机仿真证实了这一理论分析结果。In digital signal transmission systems, orthogonally multiplexed QAM system(OMQAM) is the most efficient transmission technique at present for non ideal channel, yet the problem is that this technique is quite sensitive to the timing and carrier phase deviation in the system. In this paper, a new algorithm based on higher order cumulant is proposed to improve the timing and carrier phase tracking ability. Computer simulations have been carried out in order to verify the theoretical analysis. The comparison on convergence between the new algorithm and Hirosaki's algorithm is also given.

关 键 词：并行传输 正交复用QAM 数字通信 

分 类 号：TN919.64[电子电信—通信与信息系统]