文章摘要
胡博,杨德森.SαS分布在分析水中冲击噪声中的应用[J].声学技术,2006,(2):134~139
SαS分布在分析水中冲击噪声中的应用
Symmetic alpha-stable distributions for analysis of underwater impulsive noise
投稿时间:2005-02-22  修订日期:2005-05-12
DOI:
中文关键词: SαS分布  高斯分布  水中冲击噪声
英文关键词: symmetric α-stable distribution  Gaussian distribution  underwater impulsive noise
基金项目:
作者单位
胡博 哈尔滨工程大学水声工程学院, 哈尔滨, 150001 
杨德森 哈尔滨工程大学水声工程学院, 哈尔滨, 150001 
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中文摘要:
      针对水声处理中存在的瞬态冲击噪声问题,介绍了瞬态冲击噪声的特点,指出传统的高斯分布并不适合于描述冲击噪声,与此相比,SαS分布具有性能稳定,拖尾大等特点,并给出了SαS分布的定义及相关性质,通过参数估计log|SαS|法对其分布参数进行估计,并对新模型进行了仿真分析及实际数据处理比较,证实了SαS分布在描述水中瞬态冲击噪声方面比传统的高斯分布有更大的优势,因此SαS分布能够更好地描述水中瞬态冲击噪声。
英文摘要:
      Impulsive noise in underwater acoustic signal processing is introduces.An introduce to a statistical model is given based on a class of symmetric α-stable(SαS) distributions which is well suited for modeling noise that are impulsive in nature.An overview of the class of α-stable distributions and α-stable distribution parameter estimation is presented.This distribution is used to model measured impulsive noise.It is demonstrated that the SαS distribution with heavier tails than the Gaussian distribution gives a much better approximation to underwater impulsive noise.
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