SAR对多舰船目标成像算法研究  

Study on SAR Imaging of Multiple Ships

作　　者：杨敏[1] 张小红[2] 邢孟道[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,710071 [2]海军驻西安二十所军事代表室,710068

出　　处：《现代导航》2011年第1期23-29,共7页Modern Navigation

摘　　要：本文提出一种基于沙漏型变换的多舰船目标成像算法。对于近似为线性调频信号的舰船方位向回波，可以通过对其自相关函数进行沙漏型变换，解除其时延和时间的耦合，从而实现回波的相干积累，获得高质量的多舰船目标图像。文中对沙漏型变换的，变换后信号的聚焦特性及交叉项的影响进行了详细的分析，并且提出了一种适用于多舰船目标成像的尺度因子选取标准。In this paper, a new algorithm based on sandglass transformation is presented for synthetic aperture radar （SAR） imaging of multiple ships. For cross-range signals of ship in the approximate form of linear frequency modulated （LFM） signals, the instantaneous autocorrelation function of signals is used to implement the sandglass transformation and decouple the time and lag time. Thus, cross-range signals can be integrated coherently and the multiple-ship image with high quality is achieved. In addition, a detailed analysis on the focusing characteristic of signal and the effect of cross-terms is presented, and a criterion of scaling factor selection for multiple-ship imaging is discussed.

关 键 词：合成孔径雷达(SAR) 多舰船成像 沙漏型变换 相干积累 尺度因子 

分 类 号：TN958[电子电信—信号与信息处理]