Computer Engineering and Applications ›› 2013, Vol. 49 ›› Issue (5): 210-212.
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LI Rui, TAO Liang
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Published:
李 锐,陶 亮
Abstract: The traditional single-window based discrete Gabor transform has a fixed joint time-frequency resolution. Due to the uncertainty principle the time resolution and frequency resolution in the Gabor transform domain have an inverse proportion relationship. In order to improve the joint time-frequency resolution of the traditional discrete Gabor transform and speed up the transform, it presents a multi-Gaussian window based real-valued discrete Gabor transform. The experimental results show that the proposed transform can effectively improve the accuracy of the joint time-frequency resolution, it provides a fast method for the computation of the evolutionary spectrum of the non-stationary signals with the high joint time-frequency resolution.
Key words: real-valued discrete Gabor transform, time-frequency signal analysis, evolutionary spectrum
摘要: 传统的单窗复值离散Gabor变换具有固定的时频分辨率,由于受窗函数时宽-带宽之间的制约关系,即不确定性原理限制,其时间分辨率和频率分辨率是矛盾的关系。为了改善传统离散Gabor变换时频分辨率并加快其变换速度,提出了一种基于多高斯窗的实值离散Gabor变换,实验结果表明能有效改善联合时频域内的聚集性,从而提供了一种快捷地计算非平稳信号进化谱方法。
关键词: 实值离散Gabor变换, 时频分辨率, 进化谱
LI Rui, TAO Liang. Multi-Gaussian window based real-value discrete Gabor transform[J]. Computer Engineering and Applications, 2013, 49(5): 210-212.
李 锐,陶 亮. 基于多高斯窗的实值离散Gabor变换[J]. 计算机工程与应用, 2013, 49(5): 210-212.
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http://cea.ceaj.org/EN/Y2013/V49/I5/210