基于TDRSS的高速数传信号载波捕获及跟踪算法研究

以TDRSS数传系统为研究背景,针对TDRSS数传信号的特点,以实现高速8PSK调制信号的载波同步与跟踪为研究前提。提出了一种采用二叉树(BinarySearchTree)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(MonteCarlo)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。

Algorithm for Carrier Acquisition and Tracking of High-Speed 8PSK Modulated Signals Based on TDRSS

The work in this paper is related to the TDRSS of our country. It is the most important aim in the paper that research and implement carrier acquisition and tracking for high-speed 8PSK modulation signal. 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 acquisition 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-digital Radar receiver.