一种实用的MPSK／TDMA突发信号盲解调方案

摘要

In view of TDMA target signal parameter completely unknown,a kind of blind demodulation scheme of MPSK/TDMA burst signals is put forward.In this scheme,a blind detection algorithm based on unique word is used to correctly detect burst signals,an improved modified covariance method is used to accurately estimate the carriers,and a nonlinear transformation algorithm is used to ac⁃curately estimate the symbol rate of MPSK signal.A feedforward method with carrier synchronization and code synchronization algorithm is designed to realize blind demodulation of MPSK/TDMA burst signals.The theoretical analysis and simulation experiment results show that this scheme has better performance in engineering application.%针对时分多址（ TDMA）目标的信号参数完全未知的情况，提出了一种MPSK／TDMA突发信号盲解调方案。该方案采用基于独特字的信号盲检测算法对突发信号进行了正确检测，采用改进修正协方差法来精确估计载波，采用基于非线性变换方法来精确估计MPSK信号的符号速率。设计了一种前馈法的载波同步和码元同步算法，实现了MPSK／TDMA突发信号的盲解调。理论分析和仿真试验表明，该方案具有良好的工程应用性能。