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一种有效的MTI滤波器设计方法

谷泓;赵永波;张守宏   

  1. (西安电子科技大学 雷达信号处理重点实验室, 陕西 西安 710071)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-02-20 发布日期:2003-02-20

An efficient method for the design of MTI filters

GU Hong;ZHAO Yongbo;ZHANG Shouhong

  

  1. (Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-02-20 Published:2003-02-20

摘要: 针对雷达杂波抑制中常用的时变级联MTI滤波器,提出了一种新的设计方法.在对设计时变级联MTI滤波器中第一级滤波器的特征矢量法进行分析的基础上,利用第一级滤波器的近似线性相位来得到动杂波的多普勒频率,然后查权库表求得第二级滤波器权系数.与零点设计法相比,所提方法运算量小,易于在实际系统中实时实现.设计实例证实了这种方法的有效性.

关键词: 时变滤波器, 杂波抑制, 雷达信号处理

Abstract: clutter rejection is an important problem in radar signal processing. A new method for the design of the time-varying cascaded MTI filters used in radar clutter rejection is presented in this paper. Based on the analysis of the Eigenvector method used for the design of the first filter, the new method first obtains the Doppler frequency of the moving clutter by using the nearly linear phase of the first filter. Then the weight coefficients of the second filter are obtained by the use of the table of the weight coefficients. Compared with the zero design method, the proposed method has a low computation complexity. Therefore, the proposed method is easy to implement for the practical system in real time. The design examples are presented to show that the method is effective.

Key words: keywords

中图分类号: 

  • TN957.52