Keystone变换实现方法研究  

Research on Implementation of Keystone Transform

作　　者：王娟[1] 赵永波[1] 

机构地区：[1]西安电子科技大学,西安710071

出　　处：《火控雷达技术》2011年第1期45-51,共7页Fire Control Radar Technology

基　　金：航空科学基金项目(20090181007)

摘　　要：在传统PD雷达里,当相干积累时间较长或信号带宽很大、目标运动速度很高时,回波会出现越距离单元走动,从而影响雷达探测目标的性能。Keystone变换是校正脉冲回波距离走动的常用方法。本文详细研究了Keystone变换的三种常用实现方法,对它们的运算量作了比较,指出Chirp-Z变换能较好地满足系统实时性的要求。仿真分析和实测数据处理结果表明了这三种实现方法的有效性。In conventional pulse Doppler（PD） radar,range migration will occur when coherent accumulation time is long,bandwidth of signals is very broad or target velocity is high,which will affect radar detection performance.Keystone transform is a commonly used method to correct range migration.Three implementation ways of Keystone transform are studied,computation load comparison between these implementation ways shows that Chirp-Z transform can preferably satisfy requirement of system real-time performance.Computer simulation and measured data processing results confirm the validity of the algorithms.

关 键 词：PD雷达 越距离单元走动 KEYSTONE变换 CHIRP-Z变换 实时性 

分 类 号：TN95[电子电信—信号与信息处理] TP301.6[电子电信—信息与通信工程]