| 联合时频技术用于ISAR像综述 |
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| 引用本文： | 王立冬,胡卫东,郁文贤.联合时频技术用于ISAR像综述[J].系统工程与电子技术,2005,27(12):2025-2029. |
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| 作者姓名： | 王立冬 胡卫东 郁文贤 |
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| 作者单位： | 国防科技大学ATR重点实验室,湖南,长沙,410073 |
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| 摘 要： | 由于雷达回波的时变和频变特性,使得当基于FFT处理进行ISAR成像时,图像上存在许多扩展散射点和虚假响应,严重影响了图像质量,并对ISAR像的后续处理带来困难。而联合时频技术由于能有效处理时变信号,因而在提取ISAR运动补偿信息、瞬时(瞬频)成像、ISAR像后续处理及理解ISAR成像机理等方面有许多成功的应用,本文对此进行了较为系统的总结。
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| 关 键 词： | 联合时频(JTF)技术 散射机理 运动补偿 ISAR成像 小波变换 自适应高斯表示(AGR) 时频分布序列(TFDS) |
| 文章编号： | 1001-506X(2005)12-2025-05 |
| 修稿时间： | 2004年8月17日 |
Summarization of ISAR processing based joint time-frequency technique |
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| WANG Li-dong,HU Wei-dong,YU Wen-xian.Summarization of ISAR processing based joint time-frequency technique[J].System Engineering and Electronics,2005,27(12):2025-2029. |
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| Authors: | WANG Li-dong HU Wei-dong YU Wen-xian |
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| Abstract: | Due to time-varying and frequency-varying characteristics, ISAR imagery based FFT processing is seriously blurred because there are many extended scattering centers and artificial responses on the imagery, and it makes following processing more difficult. Joint time-frequency techniques as powerful tools to time-varying signal have been successfully applied to ISAR processing in recent years. These application include motion compensation, instantaneous imaging, ISAR imagery processing, and understanding of radar scattering mechanism. A review is given in this paper. |
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| Keywords: | joint time-frequency technique (JTF) radar scattering mechanism motion compensation ISAR imaging wavelet transform adaptive Gaussian function representation (AGR) time-frequency distribution series (TFDS) |
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