Translations:Prewhitening - book/4/en

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Prewhitening can be understood in several ways. Figure 11a shows a minimum-phase wavelet and its inverse, and Figures 11b and 11c show, respectively, the autocorrelations and the amplitude spectra of these wavelets. Next, the autocorrelation of the minimum-phase wavelet has its zero-lag autocorrelation coefficient boosted (the prewhitening step), which produces the wavelets, autocorrelations, and amplitude spectra shown in Figure 12a through 12c, respectively. We see that the amplitude spectrum of the inverse of the prewhitened wavelet, which is shown in Figure 12c, has better characteristics than the characteristics of its counterpart depicted in Figure 11c.