提出了一种实现PCMA系统中本站返回信号快速捕获的方法。该方法首先根据通信卫星与地球站的几何位置关系粗略估计本站返回信号的到达时间,设计通用的捕获时间窗口减小延时搜索范围,以减小总的虚警和漏警代价;然后采用基于资源复用的匹配滤波捕获算法,以较少的硬件资源获得了较高的检测概率。 A method to realize the rapid acquisition of the returned signal of the station in PCMA system is proposed. The method first roughly estimates the arrival time of the returned signal of the local station according to the geometric position of the communication satellite and the earth station, and designs a general capture time window to reduce the delay search range so as to reduce the total false alarm and alarm leakage cost. Then, Based on the resource reuse matching filter capture algorithm, with fewer hardware resources to obtain a higher detection probability.