文章摘要
沈希忠,孟光.具有最陡主瓣的最小方差时频分析[J].声学技术,2008,(6):888~891
具有最陡主瓣的最小方差时频分析
Time-frequency analysis of minimum variance with the steepest main lobe
投稿时间:2008-04-28  修订日期:2008-07-30
DOI:
中文关键词: 非平稳  自适应  时变窗  主瓣
英文关键词: non-stationary  adaptivity  varying window  main lobe
基金项目:上海市教育委员会重点学科建设项目资助(J51501)
作者单位E-mail
沈希忠  shenxizhong@online.sh.cn 
孟光   
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中文摘要:
      针对非平稳时间序列,基于最小方差谱估计提出自适应加窗的时频分析方法,所叠加的时间窗能够自适应地调整尺寸,使得所估计的谱具有最陡的瞬时主瓣以适应时频分析,从而获得满意的非平稳信号的时频分布。仿真结果以及与参考文献的方法比较表明,该方法能够提供更好的频率分辨率,时频分布性能更好。
英文摘要:
      Adaptive time-frequency analysis of non-stationary time sequences is proposed based on minimum variance spectral estimation.Time windows are added to the sequences with adaptive window size to make the power spectral characterize with the steepest main lobe for the time-frequency analysis with the best performances.
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