文章摘要
李玲,杜鹏.基于MUSIC功率谱估计的直升机空中信号分析[J].声学技术,2017,(5):499~502
基于MUSIC功率谱估计的直升机空中信号分析
Analysis of helicopter radiated signal based on MUSIC spectrum estimation
投稿时间:2016-05-04  修订日期:2016-07-18
DOI:10.16300/j.cnki.1000-3630.2017.05.017
中文关键词: 直升机声信号  目标线谱  MUSIC算法
英文关键词: helicopter acoustic signal  target line spectrum  MUSIC algorithm
基金项目:
作者单位E-mail
李玲 水下测控技术国家重点实验室, 辽宁大连 116013 lindali2008@163.com 
杜鹏 水下测控技术国家重点实验室, 辽宁大连 116013  
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中文摘要:
      针对直升机飞行的辐射噪声特征谱线进行分析,提出一种基于MUSIC算法的直升机声信号处理方法。首先阐述MUSIC谱估计方法,然后针对实测不同机型直升机的飞行辐射噪声数据,分别进行MUSIC算法和传统方法的频谱分析,对得到的结果进行分析比较,数据处理结果表明MUSIC算法能够抑制噪声,明显改善信噪比,并能够更为细致地体现直升机声信号的谐波特性。
英文摘要:
      A method based on multiple signal classification(MUSIC)algorithm is proposed to process the helicopter radiated acoustic signal with random noise under the condition of the assumption that is the signal and noise are mutually uncorrelated. This paper introduces the MUSIC spectrum estimation method, and then uses the traditional method and MUSIC algorithm to process the signals radiated by different types of helicopters. The results show that MUSIC spectrum estimation can suppress the noise, extrude the peak of spectrum to improve signal to noise ratio obviously and reflect the harmonic characteristics of helicopter acoustic signal accurately.
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