一种基于舰船辐射噪声起伏特性的线谱提取方法  

A processor to extract the line-component spectrum of ship radiated noise based on fluctuations

作　　者：张大伟[1] 章新华[1] 李前言 杨玉峰[2] 

机构地区：[1]海军大连舰艇学院 [2]中国人民解放军91329部队

出　　处：《舰船科学技术》2015年第10期85-88,共4页Ship Science and Technology

摘　　要：分析舰船辐射噪声中线谱噪声的低起伏特性,提出一种利用线谱幅度、相位随时间的低起伏特性进行线谱提取的新方法。经过实测数据测试,表明本方法在提高信噪比、改善频率分辨率方面相对于经典的Welch周期图法具有明显优势;并且达到了自适应地去除连续谱趋势的效果;同时,需要的数据量相对较少,具有较好的实时性。The low-fluctuation of ship radiated noise＇ s line-component spectrum is analysed in this paper. A new processor to Extract the line-component spectrum exploiting its fluctuation of amplitude and phase is presented. And its performance is compared to the performance of Welch method based on the measurement data. It is showed that the new processor does well in signal-to-noise（ SNR） gain and spectral resolution. In addition it can reduce the continuous-component spectrum adaptively. It also use less data and have the real-time character.

关 键 词：起伏特性 线谱提取 非线性后置处理 自适应 

分 类 号：U666.7[交通运输工程—船舶及航道工程]