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    • 3. 发明申请
    • APPARATUS AND METHOD FOR ADAPTIVE TIME-FREQUENCY ANALYSIS
    • 自适应时频分析的装置和方法
    • US20120089372A1
    • 2012-04-12
    • US13242471
    • 2011-09-23
    • Sun-Hua PaoYio-Wha ShauChieh-Neng Young
    • Sun-Hua PaoYio-Wha ShauChieh-Neng Young
    • G06F19/00
    • G06F17/14
    • An apparatus and a method for adaptive adaptive time-frequency analysis are suitable for nonlinear and nonstationary signal analyses. The method includes the following steps. A plurality of positions of local extrema of a signal is determined. Average frequencies between the local extrema and mean energy distribution corresponding thereto are estimated according to the positions of the local extrema of the signal. The estimated instantaneous energy distribution of the signal is determined by way of optimization according to each of the mean energy distribution between the local extrema. Finally, an instantaneous frequency of the signal is estimated according to the estimated instantaneous energy distribution of the signal.
    • 自适应时频分析的装置和方法适用于非线性和非平稳信号分析。 该方法包括以下步骤。 确定信号的局部极值的多个位置。 根据信号的局部极值的位置来估计与其对应的局部极值和平均能量分布之间的平均频率。 通过根据局部极值之间的每个平均能量分布的优化来确定信号的估计瞬时能量分布。 最后,根据估计的信号瞬时能量分布来估计信号的瞬时频率。