QAM盲相位估计算法的相位模糊研究  

A Study on Phase Ambiguity of Blind Phase Estimation Algorithm for QAM

作　　者：林华明[1] 葛临东[1] 武延军[1] 

机构地区：[1]解放军信息工程大学信息工程学院,河南郑州450002

出　　处：《通信技术》2008年第2期7-9,共3页Communications Technology

基　　金：河南省自然科学基金(0611051400)

摘　　要：相位模糊问题是相位估计中普遍存在的。文中以CEO(Concentration Ellipse Orientation)盲(非数据辅助)相位估计算法为例,讨论了相位模糊问题,引入了循环域算法,得到了循环域消除相位模糊算法;提出了一种新的消除相位模糊的算法,该算法适用于短突发QAM信号;为了比较相位模糊消除算法的性能,进行了Monte Carlo仿真,从中得出了一些有用结论。Phase ambiguity occurs frequently in phase estimation. In order to remove phase ambiguity of CEO blind （NDA） phase estimation algorithm, circular area algorithm is introduced and simplified, and a phase ambiguity removal algorithm based on circular area is obtained, a new phase ambiguity removal algorithm suitable for short burst-mode QAM signals is presented. Simulations on Monte Carlo are performed for performance comparison among different phase ambiguity removal algorithms, from which some useful conclusions are drawn.

关 键 词：正交幅度调制 盲相位估计 相位模糊 循环域 

分 类 号：TN911[电子电信—通信与信息系统]