【摘要】 船舶辐射噪声的功率谱由连续的宽带谱和离散窄带线谱组成。在被动声纳系统中 ,线谱检测是一个至关重要的问题。本文对线谱检测技术进行了综述。该领域最新进展表明 ,为了能够在低信噪比下检测和提取线谱 ,往往采用两种或多种组合方法 ,并且利用了多个时刻的数据更多还原

【Abstract】 The spectrum of radiated noise from ships consists of a continuous broadband spectrum and a discrete narrow-band line-spectrum. A crucial issue in a passive sonar system is detection of the spectral lines. A review of techniques for detection of spectral lines is given in this paper. Recent developments in this field show that, in order to detect spectral lines at a very low signal to noise ratio, combination of more than one method is usually adopted, and multiple frame spectra are used.更多还原