突发模式PSK信号的联合载波位时钟恢复算法

A New Algorithm for Simultaneous Carrier and Bit-Timing Recovery in Burst Mode PSK Transmission

快速载波和位时钟恢复是突发模式传送系统的一个关键因素。本文提出了适用于突发模式PSK信号捕获阶段的一种快速联合载波位时钟恢复算法。算法基于一个特定图案的前导字，采用前向结构直接、同时估计各个同步参数。可估计的载波频差范围是大的，约为符号率的，并且算法所需的计算负载非常低，适合数字硬件实现。仿真结果验证了算法的可行性和有效性。

Rapid carrier and clock recovery is a key technique in burst mode transmission. A new algorithm for fast simultaneous carrier and bit-timing recovery during the acquisition phase in burst mode PSK transmission is proposed. The algorithm is based on the use of a special preamble, which allows the reference parameters to be estimated quickly, directly and simultaneously. Its estimation range is large, about of the symbol rate, while the algorithm proposed requires a very low computational load and is very easy to implement with digital hardware. The feasibility and effectiveness on the algorithm has been verified by simulation result.