文章摘要
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,(1):22~25
舰船辐射噪声的分段自仿射IFS模型
Self-affine iterated function system model of ship radiated noise
投稿时间:1998-10-27  修订日期:1998-12-15
DOI:
中文关键词: 非线性  分形  自仿射  目标识别  参数提取
英文关键词: non-linear  fractal  self-affine  target recognition  parameter extraction
基金项目:
作者单位
陈向东 东南大学无线电工程系, 南京 210018 
高翔 东南大学无线电工程系, 南京 210018 
陆佶人 东南大学无线电工程系, 南京 210018 
摘要点击次数: 1103
全文下载次数: 970
中文摘要:
      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(Iterated Function System迭代函数系统)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参数。
英文摘要:
      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.
查看全文   查看/发表评论  下载PDF阅读器
关闭