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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 aper- ture sonar（SAS） systems to compensate for high-order and space-variant system errors, a new chirp scaling（CS） im- aging 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 stud- ied in two-dimensional space domain. The error analysis results show that the presented method fully meets the re- quirements for the high-resolution synthetic aperture image formation. Further, simulated and real data were used to validate the presented method.
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A quality-guided and local minimum discontinuity based phase unwrapping algorithm for InSAR/InSAS In
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