HPRF频率步进雷达数字多通道接收研究

频率步进雷达作为一种距离高分辨雷达获得了广泛应用。本文分析了高脉冲重复频率（HPRF）频率步进雷达中频接收机带宽与距离窗口的关系，指出物理多通道接收虽然可以增大雷达搜索范围，但增加了系统复杂性。本文提出一种数字实现多通道接收机的方法，旨在不增加系统设备量前提下，扩大频率步进雷达搜索范围。同时分析了传统多通道数字下变频接收机结构的不足，给出一种基于多相滤波器组的高效实现结构。最后通过仿真验证了该数字多通道接收机设计的正确性和可行性。 

HPRF Stepped Frequency Radar Digital Multichannel Receiver Study

Stepped frequency radar has ability of high range resolution and its applicability has been well documented. Relation between intermediate frequency bandwidth and range window of HPRF stepped frequency radar is analyzed in this paper. The method using multiple receiver channels can cover the entire interested range, but it complexes system. This paper proposed a digital multichannel receiver which aimed to enlarge the search coverage of stepped frequency radar without increasing system equipments. Then, we analyzed the drawback of conventional digital multichannel receiver and proposed an efficient structure based on polyphase filter. Finally, computer simulation demonstrates the effectiveness and feasibility of the proposed method.