The synthetic aperture imaging algorithm is one of the key of the synthetic aperture radar technique, and the range-doppler algorithm is the most classical and common algorithm.

合成孔径成像算法是合成孔径雷达技术中的关键技术之一，距离多普勒算法是成像算法中最经典最常用的算法。

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Movement compensation is the key technique in synthetic aperture sonar(SAS) imaging, and it is normally realized in SAS system by the cross correlation of the raw echo data of multiple-receiver.

运动补偿是合成孔径声纳（SAS）成像的关键问题，SAS系统一般利用多接收元回波信号的互相关特性进行运动补偿。

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At first, the principle of synthetic aperture focusing technique for ultrasonic imaging is introduced in this paper.

本文首先介绍了合成孔径聚焦超声成像的基本原理。

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