一种鱼雷辐射噪声的线谱估计方法

基于鱼雷辐射噪声的物理特性和线谱特征,探讨了一种鱼雷目标特征提取方法。该方法结合经典谱与现代谱估计,提取水下目标辐射噪声线谱特征。通过两次估计采集数据的功率谱,得到估计算法功率谱图,然后分析功率谱图,先确定线谱存在的大致区域,再估计精确线谱。进行仿真研究,得到了较好的效果,证明该方法对低频段的线谱特征提取有很好的实用性。

An Estimation Method for Line Spectra of Torpedo Radiated Noise

Based on the physical causes and spectral characteristics of torpedo radiated noise line spectra, this paper researches on feature extraction of torpedo target .This method, combining traditional and modern spectra estimation, extracts the line spectra feature of radiated noise, estimates the power spectra of the collected data twice, and gets the spectrogram of the algorithm; furthermore, analyzes the spectrogram, gains the approximate scope of line spectra and then get the precise value of line spectra. The simulation for line spectra estimation is doing by using the proposed method and gets good result. The result of computer simulation shows that the method is effective in extracting line spectra from radiated noise.