基于Keystone变换的警戒雷达信号处理  

Novel signal processing method for surveillance radar based on Keystone transform

作　　者：张卫杰 高昭昭 许博 高尚伟 

机构地区：[1]电子信息控制重点实验室,四川成都610036

出　　处：《系统工程与电子技术》2011年第9期2007-2011,共5页Systems Engineering and Electronics

基　　金：国家重点实验室基金(9140C1004070904)资助课题

摘　　要：增加积累时间是提高检测微弱目标能力的一种重要手段。为了实现警戒雷达对高速运动微弱目标的探测,提出了一种新的雷达信号处理方法。利用Keystone变换补偿长时间积累和目标高速运动导致的跨距离单元走动,使目标能量得到有效积累,并通过数据融合解多普勒模糊,实现对目标的有效检测和参数估计。该方法可以用于对不同距离和速度的多个目标长时间相参积累和检测,同时,随着脉冲积累个数的增加,提高了测速精度。多目标仿真的结果验证了该方法的有效性。The improvement of the capability to detect dim targets is commonly realized by long-term accumulation. In order to detect those high speed targets, a novel radar signal processing method based on Keystone transform for surveillance radar is presented, which is able to compensate the range migration effect caused by long dwell time and high speed motion of targets. The target energy is accumulated effectively, and Doppler ambiguity is solved by data fusion. Finally, the target detection and parameter estimation are implemented. The proposed method can be used to detect multiple dim targets with different ranges and velocities by long term coherent accumulation. Meanwhile, the speed measurement resolution is improved significantly with the number of pulses increased. Multi target simulation results illustrate the effectivity of the proposed method.

关 键 词：警戒雷达 KEYSTONE变换 微弱目标探测 距离走动 

分 类 号：TN95[电子电信—信号与信息处理]