合成孔径声呐多接收阵数据融合CS成像算法  

Chirp scaling imaging algorithm for synthetic aperture sonar based on data fusion of multi-receiver array

作　　者：张学波[1] 唐劲松[1] 钟何平[1] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《哈尔滨工程大学学报》2013年第2期240-244,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(61072092;61101205)

摘　　要：多接收阵合成孔径声呐中收、发阵元空间的分置,使得斜距历程成为2个独立的双曲函数之和;因而很难获得其快速成像算法所必须的距离多普勒域和二维频域内的解析表达式.文中将收、发相位历程对方位向多普勒频率的贡献分开来考虑,把多接收阵模式下的时域回波数据等效为准收发合置项和收发分置畸变项的二维卷积.因此去收发分置畸变项处理之后,多接收阵合成孔径声呐就转换为传统的收发合置合成孔径声呐成像问题.在此基础上,文中给出了一种基于该方法的CS成像算法.最后,仿真实验和湖试结果验证了该方法的有效性.The different locations for the transmitter and receiver array elements in the multi-receiver synthetic aper- ture sonar （SAS） make the course of slant range become the sum of two individual hyperbolic functions. Thus, it is very difficult to get the range-Doppler domain and two-dimensional frequency domain analytical expressions, which are indispensable parts for multi-receiver SAS fast imaging algorithms. This paper considers the contributions of transmitter and receiver phase history to the Doppler frequency of azimuth phase separately. As a result, the time domain echo data in the multi-receiver array pattern is identical to a two-dimensional convolution of quasi-monostat- ic and bistatie deformation terms. Therefore, after removing the bistatic deformation term, the multi-receiver SAS may be transferred into a conventional monostatic SAS imaging problem. Based on the premise of transferring the multi-receiver SAS into a conventional monostatic SAS imaging problem, a Chirp Scaling （CS） imaging algorithm study was conducted. Finally, the simulation and lake trial results show the validity of the proposed method.

关 键 词：合成孔径声呐 多接收阵 驻相方法 CS算法 数据融合 

分 类 号：TN911.7[电子电信—通信与信息系统]