| 海面舰船目标ISAR最优成像时间选择算法 |
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| 引用本文： | 朱岱寅,俞翔,汪玲. 海面舰船目标ISAR最优成像时间选择算法[J]. 数据采集与处理, 2014, 29(4): 526-532 |
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| 作者姓名： | 朱岱寅 俞翔 汪玲 |
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| 作者单位： | 南京航空航天大学电子信息工程学院，南京工程学院计算机工程学院 |
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| 摘 要： | 通过分析高海情下海上舰船目标的三维摇摆对成像的影响，基于方差定义的平均多普勒展宽概念，提出了一种逆合成孔径雷达(ISAR)最优成像时间选择算法。该算法根据目标距离向先验信息估计出舰船的固有纵摇周期，利用该周期隔离微多普勒效应的干扰，并为多普勒展宽曲线的平滑提供了可靠依据，使得算法整个过程无需人工干预。该算法易实现且运算量较低，适用于实时应用。仿真和实测数据的处理结果表明，利用本文算法筛选出的数据段获得了较理想的成像结果。
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| 关 键 词： | ISAR；最优成像时间；多普勒展宽；纵摇周期 |
Optimal Processing Time and Duration Selection Algorithm for ISAR |
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| Zhu Daiyin,Yu Xiang,Wang Ling. Optimal Processing Time and Duration Selection Algorithm for ISAR[J]. Journal of Data Acquisition & Processing, 2014, 29(4): 526-532 |
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| Authors: | Zhu Daiyin Yu Xiang Wang Ling |
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| Affiliation: | College of Electronic and Information Engineering, Nanjing University of Aeronautics & Astronautics, College of Computer Engineering, Nanjing Institute of Technology |
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| Abstract: | Through analyzing the influence of imaging of 3D rocking ship targets under heavy scale sea, as well as based on the concept of variance, an average Doppler spread definition is proposed to estimate the optimal processing time and duration for ISAR. In this algorithm, the ship natural pitching period is estimated through the information of the range direction, by which the micro Doppler effect is eliminated and a reliable basis for smoothing Doppler spread curve is provided. The algorithm can work automatically instead of artificial intervention. The simulation and measured data processing results show that ideal ISAR images can be obtained by using the data segments selected by the proposed algorithm. |
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| Keywords: | ISAR optimal processing time Doppler spread pitching period |
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