适用于宽带雷达的非相干杂波抑制方法

Method of noncoherent clutter suppression suited to wideband radar

针对常规窄带雷达中的杂波抑制通常采取MTI或MTD的相干处理的实现方法,在宽带条件下,提出一种新的杂波抑制方法———非相干动目标显示(NMTI)方法,即通过雷达回波信号的瞬时位移来检测运动目标。从地面雷达杂波的模拟出发,对宽带雷达条件下的NMTI方法作了较深入的仿真研究。在相应的速度条件下,信杂比改善因子指标能够满足实际应用要求。同时,其实现过程比相干处理更加简单,降低了系统设计的复杂性。该方法可有效应用于宽带雷达的杂波抑制处理中。

The coherent processing method, such as MTI or MTD, is commonly used for clutter suppression in conventional narrowband radar. In wideband conditions, a new method of clutter suppression-noncoherent moving target indication (NMTI), can be used. That is namely detecting moving target through instantaneous displacement of radar echo signal. Ground radar clutter simulation is first discussed, and an in-depth simulation study on the NMTI method suited to wideband radar is made. In the corresponding speed condition, signal-to-clutter ratio improvement factor can meet requirements of practical application, and it can simplify design of radar system. This method can be applied to clutter suppression processing in wideband radar in effect.\;