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| 复值小波在湖底回波特征提取中的应用 | |
| 引用本文： | 刘建国,严胜刚,苑秉成.复值小波在湖底回波特征提取中的应用[J].武汉理工大学学报(交通科学与工程版),2010,34(2):318-322. |
| 作者姓名： | 刘建国 严胜刚 苑秉成 |
| 作者单位： | 1. 西北工业大学航海学院,西安,710072;海军工程大学兵器工程系,武汉,40033 2. 西北工业大学航海学院,西安,710072 3. 海军工程大学兵器工程系,武汉,40033 |
| 基金项目： | 第42批中国博士后科学基金项目(批准号:20070420181);;首批中国博士后科学基金项目(批准号:200801487)资助 |
| 摘 要： | 提出了一种应用复值小波变换进行湖底回波特征提取的方法:采用线性相位的复db小波,对复解析信号进行多尺度的复值小波变换,然后提取合适尺度上的幅度信息作为目标识别的特征矢量.结合实测数据的分析表明,利用复值小波变换提取的幅度特征是一种有效、稳健的特征,能获得较高的正确识别率.复值小波变换也可以采用Mallat快速算法,因此这种方法得到特征矢量维数少,使用时实时性能好,便于工程实现. |
| 关 键 词： | 复值小波变换 线性相位 复值小波 湖底回波的特征提取 |
Complex Value WT to Features Extraction of Underwater Echoes |
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| Liu Jianguo,Yan Shenggang,Yuan Bingcheng.Complex Value WT to Features Extraction of Underwater Echoes[J].journal of wuhan university of technology(transportation science&engineering),2010,34(2):318-322. | |
| Authors: | Liu Jianguo Yan Shenggang Yuan Bingcheng |
| Institution: | College of Marine Eng./a>;Northwestern Polytechnical University/a>;Xi'an 710072/a>;China;Dep.of Weapon Engineering/a>;Navy University of Engineering/a>;Wuhan 430033/a>;China |
| Abstract: | A feature extraction method of underwater echo using complex valued wavelet transform(WT) is proposed: the complex I./Q orthogonal signal is processed with linear phase complex filter banks,and then the magnitude information in the proper scale is taken as the feature vector.Since both I./Q channels simultaneously are processed,the magnitude feature vector extracted from the complex wavelet coefficients can acquire more information about the targets.It is also shown by the feature extraction and recognition... |
| Keywords: | complex valued wavelet transform linear phase complex valued wavelet function feature extraction of underwater echoes |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |