一种SAR动目标联合参数估计与重定位方法  

A Joint Parameter Estimation and Relocation Method for SAR Moving Targets

作　　者：康腾飞 金敏 KANG Teng Fei;JIN Ming(Chengdu Huirong Guoke Microsystem Technology Co.,Ltd Cheng Du 610095)

机构地区：[1]成都汇蓉国科微系统技术有限公司,四川成都610095

出　　处：《长江信息通信》2023年第11期143-145,共3页Changjiang Information & Communications

基　　金：省级科技厅项目名称及编号:广域环境高精度三维感知监视系统技术研究及应用示范编号:2021YFG0067。

摘　　要：动目标参数估计和重定位算法的精度和效率直接影响SAR-GMTI系统的探测感知性能。针对上述问题,文章提出了一种动目标联合参数估计与重定位方法,针对运动目标SAR图像序列,在多普勒定位方程组的基础上,增补两个距离方程和一个调频率方程,构建关于动目标三坐标位置以及距离方位两维速度的5参数扩展非线性方程组,通过非线性方程组求解实现动目标运动参数和位置信息联合估计,在不降低精度的前提下提高了动目标参数估计与重定位效率。仿真验证了所提方法的有效性。The accuracy and efficiency of moving target parameter estimation and relocation algorithms directly affect the detection and perception performance of SAR-GMTI systems.In response to the above issues,this article proposes a joint parameter estimation and relocation method for moving targets.Through multi-aperture joint processing,two distance equations and one frequency modu-lation equation are added to the range Doppler positioning equation system,and a 5-parameter extended nonlinear equation system is constructed for the three-dimensional position and two-dimensional velocity of moving targets,By solving nonlinear equations,joint estimation of moving target parameters and relocation is achieved,which improves the efficiency of moving target parameter estima-tion and relocation without reducing accuracy.The effectiveness of the proposed method was verified through simulation.

关 键 词：SAR-GMTI 参数估计与重定位 非线性方程组 

分 类 号：TN957.52[电子电信—信号与信息处理]