| 维格纳分布中交叉项干扰及平滑消除方法 |
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| 引用本文： | 吕扬生 孙悦. 维格纳分布中交叉项干扰及平滑消除方法[J]. 天津大学学报(自然科学与工程技术版), 1994, 27(6): 707-714 |
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| 作者姓名： | 吕扬生 孙悦 |
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| 摘 要： | 结合心电信号的数学模型讨论维格纳分布的交叉项干扰以及运用平滑处理消除该干扰的原理，进而探讨选择两维高窗参数的方法，模拟信号和实验的心肌缺血家兔心电信号的分析结果证实，平滑维格纳分布既可克服交叉又项干扰，又能满足心电信号分析对时间分辨率和频率分辨率的要求。
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| 关 键 词： | 心电图 维格纳分布 交叉项干扰 心电信号 |
ON INTERFERENCE WITH CROSS TERMS OF WIGNER DISTRIBUTION AND IT''''S ELIMINATION WITH SMOOTHING |
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| Lu Yangsheng, Sun Yue, Xiong Kai, Ding Beisheng. ON INTERFERENCE WITH CROSS TERMS OF WIGNER DISTRIBUTION AND IT''''S ELIMINATION WITH SMOOTHING[J]. Journal of Tianjin University(Science and Technology), 1994, 27(6): 707-714 |
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| Authors: | Lu Yangsheng Sun Yue Xiong Kai Ding Beisheng |
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| Affiliation: | Dept. of Precision Instruments Eng. |
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| Abstract: | In this paper, interferences with cross terms of Wigner distribution and smoothing principle for eliminating them are discussed by using mathematical model of ECG signal. We have considered the choice of parameters of Gaussian smoothing window in time-frequency domains. The results obtained by analyzing both simulated signal and rabbit ECGs with myocardiac ischemia prove that smoothed Wigner distribution can suppress cross term interference effectively and possess sufficient time-frequency resolution to analyze ECG signal. |
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| Keywords: | Wigner-Ville distribution cross term interference smoothing |
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