改进的机载合成孔径雷达小斜视角RD成像算法  

An improved small squint angle range-doppler imaging algorithm for airborne synthetic aperture radar

作　　者：王霖郁[1] 樊玉娟[1] 赵宏方[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2011年第4期30-34,共5页Applied Science and Technology

基　　金：中央高校基本科研业务费专项资助项目(HEUCF100826)

摘　　要：介绍了RD(range-doppler)算法的基本原理,针对原有RD算法的不足从而提出了改进的RD算法,其主要思想是雷达接收回波后,加入均方误差最小准则窗函数的全相位滤波器来消除旁瓣.用这种改进的RD算法对小斜视角多点目标进行仿真.通过仿真验证这种改进的成像算法可以对不同的点目标成像,而且还可以将点目标之间存在的旁瓣消除.实验证明了原有RD算法存在的旁瓣问题可以通过改进的RD算法来解决.This paper presents the basic principles of range-doppler（RD） algorithm.Considering the shortcomings of the original RD algorithm,an improved RD algorithm is proposed.The main idea is to introduce all-phase filter with mean square error minimal criterion window function to eliminate the sidelobes after receiving radar echo.Then use the improved RD algorithm to simulate the small squint angle multi-point targets.The simulation verifies that the improved RD imaging algorithm can not only image different point targets but also eliminate the sidelobes between point targets.The results indicate that the original RD algorithm＇s sidelobe problem can be solved by the improved RD algorithm.

关 键 词：机载合成孔径雷达 小斜视角 旁瓣 改进的RD算法 

分 类 号：TN957[电子电信—信号与信息处理]