Random noise attenuation by a selective hybrid approach using f-x empirical mode decomposition |

where and denote the estimated signal and acquired noisy signal, respectively. and denote the forward and inverse Fourier transforms along the time axis, respectively. denotes the th EMD decomposed component. denotes frequency. However, a problem occurs when applying EMD, because the dipping events will also be removed. This problem occurs because, for many data sets, the random noise and any steeply dipping coherent energy make a significantly larger contribution to the high-wavenumber energy in the domain than any desired signal (Bekara and van der Baan, 2009).

Random noise attenuation by a selective hybrid approach using f-x empirical mode decomposition |

2015-11-23