| 基于对比度最优的SAS图像自聚焦 |
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| 引用本文： | 傅寅锋.基于对比度最优的SAS图像自聚焦[J].舰船电子工程,2011,31(7):63-65,86. |
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| 作者姓名： | 傅寅锋 |
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| 作者单位： | 驻上海地区水声导航系统军事代表室 上海201108 |
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| 摘 要： | 合成孔径声纳（synthetic aperture sonar：SAS）成像中，主要通过自聚焦校正剩余相位误差。对比度最优自聚焦算法（contrast optimization autofocusing algorithm：COAA）是典型的参数化自聚焦方法，一般用于估计二次相位误差。SAS图像中的二次相位误差主要由前向速度偏差和视线方向加速度引起，本文将COAA用于校正SAS图像中由于速度偏差引入的二次相位误差。仿真和实测数据处理结果表明，对比度最优自聚焦算法可以有效补偿图像中的由于速度偏差引起的相位误差。
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| 关 键 词： | 合成孔径声纳（SAg） 对比度最优自聚焦 距离一多普勒（RD）算法 相位误差 |
SAS Imaging Autofocusing Based on Contrast Optimization |
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| Fu Yinfeng.SAS Imaging Autofocusing Based on Contrast Optimization[J].Ship Electronic Engineering,2011,31(7):63-65,86. |
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| Authors: | Fu Yinfeng |
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| Institution: | Fu Yinfeng(Military Representative Office of Underwater Acoustic Navigation System in the Shanghai Area,Shanghai 201108) |
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| Abstract: | In synthetic aperture sonar imaging,the residual phase error is mainly corrected via autofocusing.Contrast optimization autofocusing is a typical parameter autofocusing which is used to estimate and correct quadratic phase error.Quadratic phase error is mainly caused by forward velocity and acceleration in the line of sight.Quadratic phase error is corrected by using contrast optimization autofocusing algorithm(COAA) presented in this paper.Simulation experiment and experiment from lake tests show the valid... |
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| Keywords: | SAS contrast optimization autofocusing range-doppler algorithm phase error |
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