介绍了超宽带雷达的定义及其基本特点,讨论了非相干动目标显示方法的原理和实现方案,分析了该方法适用于超宽带雷达系统的原因,介绍了几种杂波类型及其相应的特点。文中建立了超宽带线性调频信号回波模型,并进行了NMTI方法的仿真分析。给出了在不同输入信杂比、目标速度、信号带宽、杂波分布、雷达脉冲重复频率等条件下的仿真结果,验证了非相干动目标显示方法消除杂波的有效性。

The definition and characteristic of ultra wide band radar were introduced.The principle and implement scheme of noncoherent MTI were discussed.The reason why this method fits for UWB radar system was presented.Also several types of clutter and their relevant characteristic were introduced.The modeling of target echo of UWB LFM radar was founded.Simulation and analysis of NMTI method were given on the base of this model.Under the conditions of different input signal/clutter,different target velocity,different radar signal band,different clutter distributing and different radar PRF,simulation result was presented.The effectiveness of NMTI method applying to the UWB LFM radar was validated.

TN958

国防预研项目(41101030203)