华中科技大学学报（自然科学版）2013，Vol.41Issue(3)：25-29,5.
基于小波尺度相关的船舶轴频电场检测方法
Detection method of ship shaft-rate electric field signal using scale correlation in wavelet domain
摘要
Abstract
In order to improve the detecting capability of ship shaft-rate electric signal with low SNR, which was attenuated by the sea water, a novel detection algorithm based on scale correlation in wavelet domain was proposed. Firstly, the wavelet transform was used to decompose the signal, and the noise power was estimated in each wavelet scale. Then, the signal and noise was separated by wavelet scale-correlation method, and the average filter algorithm was applied in the separating process due to the variance of wavelet transform. Finally, the wavelet correlations in the largest scale were extracted to detect the target by the sliding detect algorithm. The effectiveness of both the proposed algorithm and the wavelet packet entropy algorithm were verified by both measured data and simulated data. The verified results show that the proposed algorithm can detect the weak shaft-rate electric signal more effectively at the lower SNR situations.关键词
船舶/电场/轴频/小波变换/信号检测/算法Key words
ships/electric field/shaft-rate/wavelet transform/signal detection/algorithms分类
信息技术与安全科学引用本文复制引用
贾亦卓,姜润翔,龚沈光..基于小波尺度相关的船舶轴频电场检测方法[J].华中科技大学学报（自然科学版）,2013,41(3):25-29,5.基金项目
国家自然科学基金资助项目(51109215). （51109215）
