摘要
合成孔径声呐是具有距离和方位二维高分辨特性的成像声呐,运动补偿是合成孔径声呐成像的一个重要环节。在分析了多子阵SAS阵元角运动基础上,给出了空间角运动引起的空变相位误差的补偿方法。补偿算法首先将宽测绘带回波数据在距离向分块,然后依照等效相位中心相对每个距离块中心线视线偏移对回波数据进行补偿。仿真结果表明补偿算法可有效补偿由多子阵空间角运动误引起的空变相位误差。
Synthetic aperture sonar has high resolution in forming synthetic aperture image. Based on the analysis both range and azimuth, and motion compensation is crucial to of the angular movement of multiple-element SAS, a method to compensate the range-variant phase error caused by the angular movement of SAS is presented. With the method, raw data is segmented in range and the phase error in each segment is compensated according to the LOS motion between DPC and the central line of each segment. Simulation experiment shows the validity of the proposed method.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第20期6564-6567,共4页
Journal of System Simulation
基金
国家高技术发展研究"863"计划资助项目(2007AA091101)
关键词
多子阵
合成孔径声呐
角运动
运动补偿
等效相位中心
空变相位误差
multiple-element
synthetic aperture sonar
angular movement
motion compensation＇ displaced phase center
range-variant phase error
