| 基于小波变换与变步长LMS算法的船舶磁场信号检测 |
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| 引用本文： | 冯国新,张坚,李屹祥.基于小波变换与变步长LMS算法的船舶磁场信号检测[J].船电技术,2011,31(3):11-14. |
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| 作者姓名： | 冯国新 张坚 李屹祥 |
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| 作者单位： | 冯国新,李屹祥,Feng Guoxin,Li Yixiang(海军92941部队装备部,辽宁葫芦岛,125003);张坚,Zhang Jian(海军工程大学兵器工程系,武汉,430033) |
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| 摘 要： | 针对检测船舶磁场信号时信噪比较低的问题,提出了一种基于小波变换与变步长LMS算法的检测方法.根据船舶磁场信号的实际特征,首先对信号进行小波分解,并提取最后一层的低频分量,滤除高频噪声;再采用变步长LMS算法对低频分量进行自适应滤波,进一步滤除噪声,提取船舶目标特征信号.船模实验的结果表明,该算法可以显著提高信噪比,增强...
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| 关 键 词： | 磁场信号检测 小波变换 LMS算法 变步长 |
Shipboard Magnetic Signal Detection Based on Wavelet Transform and Variable Step-Size LMS Algorithm |
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| Feng Guoxin,Zhang Jian,Li Yixiang.Shipboard Magnetic Signal Detection Based on Wavelet Transform and Variable Step-Size LMS Algorithm[J].Marine Electric & Electronic Technology,2011,31(3):11-14. |
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| Authors: | Feng Guoxin Zhang Jian Li Yixiang |
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| Institution: | Feng Guoxin1,Zhang Jian2,Li Yixiang1 (1.Unit 92941 of PLA,Huludao125003,Liaoning,China,2. Department of Weaponry Engineering,Naval University of Engineering,Wuhan 430033,China) |
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| Abstract: | Aimed at the low signature-noise ratio (SNR) in detecting magnetic signal of ship, a detection algorithm based on wavelet transform and variable step-size LMS algorithm is proposed. According to the characteristics of magnetic signal of ship, the signal is firstly decomposed by wavelet transform, and the low frequency components in last level are taken out to filter out the high frequency noise. Then the low frequency components are filtered by variable step-size LMS algorithm to filter out noise and pick u... |
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| Keywords: | magnetic signal detection wavelet transform LMS algorithm variable step-size |
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