中文摘要：

对基于空域处理器和数字匹配滤波器（DMF）的捕获系统在非衰落信道下的捕获性能进行讨论，利用状态转移图推导出单次驻留判决方式时平均捕获时间的表达式，并进行了数值分析。结果表明：对于非衰落信道，单天线接收的信噪比越低，采用空域处理器对捕获性能改善的效果就越明显，且阵元数越多捕获性能越好；如果单天线接收的信噪比高于一定的值，采用空域处理器的效果就不明显，且随着天线阵元数的增加，系统的平均捕获时间反而增加；在虚警概率一定的情况下，存在一个最佳的阵元数m，使系统的平均捕获时间最小。

英文摘要：

A receiver based on a spatial processor and digital matched filter （DMF） is studied extensively in order to evaluate the performance of PN code acquisition. By using a state transition diagram, we derive the analytic expressions of the receiver＇s mean acquisition time based on a spatial processor and DMF in a AWGN channel. Numerical analysis is also given in this paper. It is shown that the proposed receiver based on a spatial processor and DMF can accelerate the process of PN code acquisition. If the signal-to-noise ratio is low, then a larger number of angular cells m are required to obtain a minimum mean acquisition time. With larger signal-to-noise ratios, only a few regions are required to achieve the same goal. Based on the assumption that the false alarm is constant, there exists an optimum number of angular cells m that minimizes the mean acquisition time.