| 舰船辐射噪声的分段自仿射IFS模型 |
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| 引用本文： | 陈向东,高翔,陆佶人. 舰船辐射噪声的分段自仿射IFS模型[J]. 声学技术, 1999, 18(1): 22-25 |
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| 作者姓名： | 陈向东 高翔 陆佶人 |
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| 作者单位： | 东南大学无线电工程系 |
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| 摘 要： | 本文根据舰船辐射噪声具有连续不可导和非平稳的特性，建立了分段自仿射ＩＦＳ模型。提取出ＩＦＳ参数并计算出ＩＦＳ分形维数。结果表明：１．在一定的压缩比下，由ＩＦＳ参数所恢复的信号具有较高的信噪比；２．两类不同目标的ＩＦＳ分形维数具有较好的离散度。本文为水声目标的分类与识别提供了新的特征分数。
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| 关 键 词： | 非线性 分形 自仿射 IFS模型 舰船噪声 辐射噪声 |
| 收稿时间： | 1998-10-27 |
| 修稿时间： | 1998-12-15 |
Self-affine iterated function system model of ship radiated noise |
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| CHEN Xiangdong,GAO Xiang and LU Jiren. Self-affine iterated function system model of ship radiated noise[J]. Technical Acoustics, 1999, 18(1): 22-25 |
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| Authors: | CHEN Xiangdong GAO Xiang LU Jiren |
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| Affiliation: | Radio Engineering Department, Southeast University Nanjing 210018;Radio Engineering Department, Southeast University Nanjing 210018;Radio Engineering Department, Southeast University Nanjing 210018 |
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| Abstract: | In this paper, the self affine iterated function system (IFS) model of ship radiated noise is established according to the continuos, non derivative and non stationary characteristics of the temporal signal of ship radiated noise. Based on the model. the IFS fractal dimension is extracted. The experiments show that:1.Under certain compression ratio, the reconstructed signal from IFS parameters has the higher SNR value. 2.The fractal dimension of IFS is defferent referring to the two kinds of ship targets. A new characteristic parameter is provided for the classification and recognition of underwater acoustic targets. |
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| Keywords: | non linear fractal self affine target recognition parameter extraction |
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