基于小波模极大值能量的船舶轴频电场检测

doi:10.3969/j.iss.0372-2012-2014.03.026

电子学报 ›› 2014, Vol. 42 ›› Issue (3): 592-596.DOI: 10.3969/j.iss.0372-2012-2014.03.026

基于小波模极大值能量的船舶轴频电场检测

贾亦卓, 姜润翔, 龚沈光

海军工程大学兵器工程系, 湖北武汉 430033

收稿日期:2012-05-24 修回日期:2013-10-20 出版日期:2014-03-25
- 通讯作者:
- 姜润翔
- 作者简介:
- 贾亦卓 男，1985出生，河北石家庄人.现为海军工程大学博士研究生，从事目标水下电磁场特性的研究.E-mail：tyututy@126.com
- 基金资助:
- 国家自然科学基金 (No.51109215）

Detection of Ship Shaft-Rate Electric Field Signal Based on Wavelet Modulus Maximum Power

JIA Yi-zhuo, JIANG Run-xiang, GONG Shen-guang

Department of Weaponry Engineering, Naval University of Engineering, Wuhan, Hubei 430033, China

Received:2012-05-24 Revised:2013-10-20 Online:2014-03-25 Published:2014-03-25
- Supported by:
- National Natural Science Foundation of China (No.51109215)

摘要/Abstract

摘要： 为了有效地从海洋环境电场背景中检测微弱的船舶轴频电场信号，对轴频信号小波模极大值的尺度分布特性进行了分析，在得出轴频观测信号中噪声模极大值的幅度和分布稠度均随尺度增大而减小的结论的基础上，通过提取最大分解尺度的模极大值能量作为特征值，利用滑动检测方法对目标进行检测，并且避免了小波模极大值的重构过程，因而计算量小，检测速度较快.最后，分别使用实测数据和仿真数据对该算法进行了验证，结果表明此算法在低信噪比情况下具有较好的检测效果，当SNR为-10.8dB时仍然具有79%的检测率.

关键词: 船舶, 轴频电场, 小波变换, 模极大值, 检测

Abstract: In order to effectively detect ship shaft-rate(SR) electric signal,the wavelet modulus maximum's scale-distribution characteristics of the measured SR electric signal is analyzed.Based on the analysis result that the intensity and distribution density of noise's wavelet modulus maximum decreases along the scale,a detecting algorithm was proposed to extract the modulus maximum power in the highest scale as feature value to detect the target glidingly.As the wavelet reconstruction is avoided in the de-noising process using wavelet modulus,the detecting algorithm proposed can be easily achieved by hardware.In the end,the effectiveness of the proposed method is verified both using measured data and simulated data,and simultaneity compared with the detecting algorithm based on wavelet packet entropy.The verified result shows that the detecting algorithm provides a better detecting performance,and it can keep detection rate of 79% when the SNR is -10.8dB.

Key words: ships, shaft-rate electric field, wavelet transformation, wavelet modulus maximum, detect

中图分类号:

TP274

贾亦卓, 姜润翔, 龚沈光. 基于小波模极大值能量的船舶轴频电场检测[J]. 电子学报, 2014, 42(3): 592-596.

JIA Yi-zhuo, JIANG Run-xiang, GONG Shen-guang . Detection of Ship Shaft-Rate Electric Field Signal Based on Wavelet Modulus Maximum Power[J]. Acta Electronica Sinica, 2014, 42(3): 592-596.

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基于小波模极大值能量的船舶轴频电场检测

Detection of Ship Shaft-Rate Electric Field Signal Based on Wavelet Modulus Maximum Power

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