空间碎片目标、远距离空间目标、新型隐身目标等,具有雷达反射截面积小、距离远、运动速度快等特点,回波信号呈现信噪比低、目标跨距离单元走动等问题,常常超出现役雷达的探测能力。为了解决该问题,提升已装备雷达的综合探测能力,文中采用Keystone变换的方法对脉冲回波信号进行距离对齐处理,采用旁路的方法对现役雷达进行相应的改造,且不改变雷达原有功能,通过相参积累提高信噪比,从而达到雷达增程探测的目的。数值仿真和试验验证表明,该方法有效,且具有较强的工程应用价值。

Space debris target, long distance space target and new stealth target often exceeded the range of the equipped radar for their characteristics of small radar cross section, long distance and high speed. Consequently, low signal-noise ratio ( SNR) and the range migration problem often occurred in the conventional radar echo signal. To solve these problems, a compensation method based on Keystone transform was proposed for range alignment, and the equipped radar is reconstructed corresponsively by using bypass method, which doesn’t change its original performance, then the pulses coherent integration was used to improve SNR. As a result, the comprehensive capability of the equipped radar system was enhanced. Simulation and experiment results show that the proposed method is applicable, therefore it has a strong engineering application value.

TN957