高速8PSK调制信号的频率捕获及跟踪算法研究  

Algorithm for Carrier Frequency Acquisition and Tracking of High-speed 8PSK Modulated Signals

作　　者：李晶[1] 朱江[1] 张尔扬[1] 沈荣骏[2] 

机构地区：[1]国防科技大学电子科学与工程学院 [2]解放军总装备部科学技术委员会,北京100080

出　　处：《信号处理》2005年第1期66-69,共4页Journal of Signal Processing

基　　金：本课题得到总装备部国防预研基金支持

摘　　要：载波频率同步是载波恢复的重要环节之一。本文基于高速8PSK调制信号完成载波频率估计的前提下,提出了一种采用二叉树(Binary Search Tree)频率搜索方法实现捕获及采用平均"滑动窗"递推最小二乘(RLS)一步预测方法实现频率跟踪的算法;并针对此方法进行了理论推导和蒙特卡洛(Monte Carlo)仿真。结果表明,该方法适用于全数字高速数传8PSK调制信号接收系统,同时也可移植、推广至全数字雷达接收机中。The most important section of carrier recovery subsystem is carrier frequency synchronization. An algorithm is proposed in this paper, based on the achievement of frequency estimation for high-speed 8PSK modulated signals, in which Binary Search Tree method is used to achieve the frequency acquistion and average sliding window Recursive Least Square method is used to achieve the frequency tracking. The theory analysis and computer Monte Carlo simulation show that this algorithm can be used in an all-digital receiver of high-speed 8PSK modulated signals, and also can be expanded to an all-degital Readar receiver.

关 键 词：8PSK调制信号 频率捕获 频率跟踪算法 频率估计 信号处理 

分 类 号：TN911.7[电子电信—通信与信息系统]