摘要
利用目标信号功率主要集中在低频部分的特点,用功率谱估计方法提取低频信号的能量作为特征,提出了所谓的浮动阈值方法,对信号滑动地进行目标检测.通过对实验船模水压场信号进行检测验证,讨论了在各种不同情况下,目标信号的特征提取及目标检测方法的效果,验证了该方法的有效性.
Based on analyzing target signal and noise signal by power spectrum estimation, a feature extraction method is proposed in this paper. The feature variable consists of energy of lower frequencies signal. The effectiveness of the method is verified by calculation results in detection and characteristic extraction of hydrodynamic pressure fields of ship models.
出处
《武汉理工大学学报（交通科学与工程版）》
2006年第2期232-234,共3页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
海军工程大学科研基金项目资助(批准号:HGDJJ03012)
关键词
功率谱估计
特征提取
目标检测
舰船水压场
power spectrum estimation
feature extraction
target detection
ship hydrodynamic pressure fields
