有色噪声在物理小波变换下功率谱分布研究
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摘要
借鉴ChristopherTorrence等利用噪声小波功率谱的统计特性检测有效信号的方法,研究有色噪声在匹配地震子波的物理小波(以下简称物理小波)下的功率谱分布规律,MonteCarlo仿真结果表明,该功率谱服从χ22分布,这是在小波域辨识有效信号和噪声的基础。利用假设检验的统计学方法,可以确定有效信号能量分布空间。
This paper studies the mean power spectrum distribution of colored noise via physical wavelet transform. It is found that the spectrum complies with chi-square distribution, which has been proved by Monte Carlo simulating experiment. This result provides a foundation for distinguishing significant signal from noise in wavelet domain. By using hypothesis and probability testing, the method of determining the space of energy distribution of significant signal is proposed.
引文
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