数字化频率分集的脉冲雷达补盲方法研究与实现

针对某型脉冲雷达对最小探测距离的要求,本文介绍了一种利用双频双脉冲形式进行近区补盲的方法,并且针对该方法设计了在接收机的单通道内实现数字化频率分集的工作方式。首先,为解决脉冲雷达探测距离存在近区盲区的问题,给出了宽、窄相结合的双频双脉冲的补盲方法,以达到雷达最小探测距离的要求。然后,利用数字化频率分集的思想在接收机单通道内完成双频双脉冲的频率分离,既实现了补盲效果,也突破了传统补盲方法下接收机通道必须完全或部分复制的固有方式,减小了接收系统的体积和复杂度,从而促进脉冲雷达系统实现小型化、轻量化。最后,在某型雷达接收系统中进行了性能测试,验证了本文方法的有效性和实用性。并且该型雷达已经完成了外场试验,最小探测距离符合要求,表明利用数字化频率分集的方式实现脉冲雷达接收机单通道的双频双脉冲补盲方法应用可行。

Study on Blind Method with Digital Frequency Diversity for Pulse Radar

This paper presents a method and implementation on Blind Method with Digital Frequency Diversity in receiver for pulse radar. First of all, in order to solve the problem of near-blind-field of detection range, we propose a blind method of double-pulse which including wide pulse and narrow pulse. Then, we complete the frequency separation of dual-frequency and double-pulse in one channel of the receiver, which not only eliminate the effect of near-blind-field, but also breaks through the inherent way that we must copy receiver channel under the traditional blinding method. Finally, we got the performance tests results which verified that the effectiveness and practicability of this method.