摘要
提出了一种适用于单观测通道的船舶辐射噪声盲源分离方法。该方法依据船舶辐射噪声远场的空间分布规律,通过将单观测通道延时和滤波的方法构造虚拟通道,使单通道转化为多通道,以实现单通道的盲源分离。仿真及实验数据分析的结果显示,分离后信号的相关系数在不同信噪比下有稳定的提高,说明该方法能在一定程度上利用单观测通道在海洋环境噪声背景下分离船舶辐射噪声,实验数据分析同时表明该方法对双目标船的分离也有一定效果。
A method of blind source separation for ship-radiated noise is proposed based on single observing channel. According to the spatial characteristic of ship-radiated noise in far field,a virtual channel is constructed from the observed channel by time delay and data filtering.It overcomes the limitation of channel numbers.The simulation and experimental results using this method are presented.The results show that under the sea ambient noise the shipradiated noise can be separated by this method with single observing channel,and it is effective for two object ships to be separated.
出处
《声学学报》
EI
CSCD
北大核心
2011年第3期265-270,共6页
Acta Acustica
基金
国防基础科研资助项目(A2420060088)
