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.
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)
