摘要
将希尔伯特-黄变换(HHT)用于水下目标特征分析,利用HHT对实录舰船辐射信号进行了特征提取,结果表明其适用于水声非平稳信号的分析,与传统时频分析方法相比具有很强的自适应特性和较好的时频聚集性。
Hilbert-Huang transform is used for extracting features of underwater target in this paper. The features of recorded ship-radiated signals are extracted with HHT method. The results show that HHT method is suitable to underwater acoustic non-stationary signal analysis, and it has good adaptive and time-frequency concentration characteristics.
出处
《电声技术》
2009年第6期36-40,共5页
Audio Engineering
关键词
希尔伯特-黄变换
固有模态函数
经验模态分解
时频熵
最近邻决策方法
Hilbert-Huang transform
intrinsic mode function
empirical mode decomposition
time-frequency entropy
nearest classifier method
