| 张学波,唐劲松,张森.基于双基模型的多接收阵合成孔径声纳CS成像算法[J].高技术通讯(中文),2013,23(9):927~932 |
| 基于双基模型的多接收阵合成孔径声纳CS成像算法 |
| A chirp scaling algorithm for multi receiver SAS imagery based on bistatic model |
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| DOI： |
| 中文关键词: 合成孔径声纳（SAS），多接收阵，双基模型，距离延迟误差，线频调变标算法 |
| 英文关键词: synthetic aperture sonar(SAS),multi receiver,bistatic model,range propagation delay error,CS algorithm |
| 基金项目: |
| 作者 | 单位 | | 张学波 | 海军工程大学水声技术研究所 | | 唐劲松 | 海军工程大学水声技术研究所 | | 张森 | 海军工程大学水声技术研究所 |
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| 中文摘要: |
| 针对多接收阵合成孔径声纳（SAS）的传统快速成像方法较难实现高阶空变系统误差补偿的问题，将多接收阵SAS看成多个双基地声纳的组合，并利用根式的等价变换和泰勒级数方法，提出了一种充分考虑 “停-走-停”近似的多接收阵SAS线频调变标成像算法。基于多接收阵SAS方位空不变和距离空变特性，在二维空域内研究了距离延迟误差，结果表明，基于双基模型的成像方法能够满足合成孔径高分辨成像。仿真和实测数据处理结果进一步验证了该方法的有效性。 |
| 英文摘要: |
| In view of the problem that it is hard for conventional fast imaging algorithms for multi receiver synthetic aperture sonar(SAS)systems to compensate for high order and space variant system errors,a new chirp scaling(CS)imaging algorithm for multi receiver SAS,which fully considers the influence of the “stop and hop” approximation,was proposed based on the regarding of a multi receiver SAS as a combination of many bistatic sonars and the usage of the equivalent transformations of the radical function and Taylor series.By using the SAS characteristics of space invariance in azimuth dimension and space variance in range dimension,the range propagation delay error was studied in two dimensional space domain.The error analysis results show that the presented method fully meets the requirements for the high resolution synthetic aperture image formation.Further,simulated and real data were used to validate the presented method. |
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