华中科技大学学报：自然科学版2011，Vol.39Issue(11)：15-18,4.
基于小波包熵的船舶轴频电场信号检测
Detection of ship shaft-rate electric field signals using wavelet packet entropy
摘要
Abstract
In order to effectively detect the weak signals from ocean environmental electric field,a detection algorithm of ship shaft-rate electric signal based on wavelet packet entropy was proposed.Firstly,wavelet packet transform was used to decompose the received signal into several nodes and the reconstructed signals of each node in the last layer were got.Then,the wavelet packet entropy of each reconstructed signal was calculated.Finally,the reconstructed signal with minimum wavelet packet entropy was selected to detect the ship shaft-rate electric signal by sliding power spectrum algorithm.The effectiveness of both the proposed algorithm and the sliding power spectrum algorithm were verified by both measured data and simulated data.Results show that the proposed algorithm can detect the weak shaft-rate electric signal from ocean environmental electric field more effectively at low SNR situations.关键词
轴频电场/小波包熵/小波包变换/重构信号/检测Key words
shaft-rate electric field/wavelet packet entropy/wavelet packet transform/reconstructed signal/detection分类
信息技术与安全科学引用本文复制引用
胡鹏,龚沈光,胡英娣..基于小波包熵的船舶轴频电场信号检测[J].华中科技大学学报：自然科学版,2011,39(11):15-18,4.基金项目
水中军用目标特性国防重点实验室基金资助项目 （）
