摘要
针对瞬态信号存在时间短、变化快,传统的信号处理方法很难对其进行方位估计的问题,将希尔伯特-黄变换与矢量信号处理相结合应用到水声领域,提出了矢量希尔伯特-黄变换的方法.利用希尔伯特-黄变换获取信号的瞬态信息,结合矢量信号处理宽带方位估计提出了矢量瞬时方位估计的概念,在此基础上发展了矢量希尔伯特-黄变换水声应用的理论框架.海试表明新理论在瞬态信号处理和单矢量传感器目标方位估计方面,其性能比常规方法有了明显的提高.
Because of the short duration of an instantaneous signal in underwater acoustics, it is difficult to perform an azimuth estimation by traditional methods. A vector Hilbert-Huang transform （V-HHT） is proposed by combining an HHT transform with vector signal processing. This method for vector instantaneous azimuth estimation uses the instantaneous information in the signal obtained from HHT in conjunction with a wideband azimuth estimate from vector signal processing. On this basis, a theoretical framework for applying HHT in acoustics was developed. Results from processing experimental data show the new method is superior to traditional methods for instantaneous signal processing and azimuth estimation which use a single vector sensor.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2008年第3期256-260,共5页
Journal of Harbin Engineering University
基金
水声技术国防科技重点实验室基金资助项目(9140C200202060C2007)
