MTI杂波对消器的专用芯片设计

ASIC-based MTI clutter cancellation

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 .

Instead of the analog device and the generally purposed DSP previously used in real time MTI radar signal processing to suppress the clutters, an ASIC based (CPLD) clutter cancellation of Seven order FIR filter whose coefficients are optimized by eigenvector method is presented for a certain spotter radar with some special requirements. It is convenient to do debugging, and now it works very well in practice with high reliability.