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雷达动目标显示MTI主要目的是对固定地杂波进行抑制 ,其实时高性能信号处理以往一般采用模拟器件和通用DSP实现 .文中针对某型侦察雷达特点 ,采用多普勒距离门概念 ,根据特征矢量法优化滤波器权系数 ,设计了七阶FIR滤波器 ,在零中频上实现对地杂波抑制 ,并成功地运用可编程逻辑器件(CPLD)进行专用集成电路设计 .信号处理部分体积小、性能稳定 ,便于调试 .
Radar moving target shows that the main purpose of MTI is to suppress the clutter fixed, its real-time high-performance signal processing in the past generally use analog devices and general-purpose DSP to achieve.In this paper, a type of reconnaissance radar characteristics, the use of Doppler distance gate concept, according to the characteristics Vector method to optimize the weight coefficients of the filter, a seven-order FIR filter is designed to suppress ground clutter at zero IF, and the ASIC is successfully designed using programmable logic device (CPLD) .The signal processing part is small in size, Stable performance, easy to debug.