基于Keystone变换的锥扫定位算法  

Conical Scan Algorithm Based on Keystone Transform

作　　者：李阳[1] 刘鹤[1] 温靖[1] 

机构地区：[1]北京理工大学雷达技术研究所,北京100081

出　　处：《北京理工大学学报》2008年第6期549-552,共4页Transactions of Beijing Institute of Technology

摘　　要：针对距离高分辨圆锥扫描测角体制中,锥扫周期内目标回波距离像跨距离分辨单元走动使得锥扫测角失败的问题,提出一种基于Keystone变换的锥扫定位算法.在径向速度未知或未精确获知的情况下,通过Keystone变换对圆锥扫描周期内获得的多个距离像进行校正,可以正确提取锥扫幅度调制信息,使锥扫测角算法得以应用.计算机仿真结果验证了该方法的有效性.In the wideband conical scan radar, the sensitivity to the radar and the target induces the range migration through resolution radial velocity between the cells among the high rangeresolution profiles. It results in the failure of the conical scan angular measurement algorithm. In this paper, Keystone transform is used for range migration compensation without requiring any accurate velocity information. By the transform, the range profiles are realigned and the angular measurements are obtained correctly by the conical scan algorithm, even if a high radial velocity exists. Some computer simulation results are presented which illustrate the effectieness of the method.

关 键 词：圆锥扫描 KEYSTONE变换 跨距离分辨单元走动 

分 类 号：TN958.7[电子电信—信号与信息处理]