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首页> 外文会议>2011 International Conference on Mechatronic Science, Electric Engineering and Computer >Time frequency analysis of multi-component non-stationary signal with filter bank decomposition
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Time frequency analysis of multi-component non-stationary signal with filter bank decomposition

机译：滤波器组分解的多分量非平稳信号时频分析

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摘要

In order to acquire outer cross term free time frequency distribution of multi-component nonstationary signal, filter bank technique was used to decompose the signal being analyzed. With filter bank, the signal was decomposed as spectral components belong to different subbands, for each spectral component, divided it as different time segment signal in time domain and combined different time segment signal which belongs to different subbands according to time continuity, the independent major components of the signal were formed. The Wigner-Ville distribution of the multi-components signal was calculated, the Wigner-Ville distribution of the independent major components were superimposed as the time frequency distribution of multi-components signal. Contrast between the two distributions show the decomposition method is practical and give outer cross term free time frequency distribution.
机译：为了获得多分量非平稳信号的外部交叉项自由时间频率分布，采用滤波器组技术对所分析的信号进行分解。利用滤波器​​组，将信号分解为频谱分量属于不同的子带，对于每个频谱分量，将其在时域中划分为不同的时间段信号，并根据时间连续性将属于不同子带的不同时间段信号组合在一起，独立形成信号的分量。计算了多分量信号的Wigner-Ville分布，将独立主要分量的Wigner-Ville分布叠加为多分量信号的时频分布。两种分布之间的对比表明，该分解方法是实用的，并给出了外部交叉项的自由时间频率分布。

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