If one wants to compute the wavelet transform of a continuous signal, then one has to assume that its digital representation is derived as in Equation (10.9) and Figure 10.9. However, the digital representation of a signal is usually obtained by filtering it with a band-limiting filter and sampling it at or above the Nyquist frequency. Supposing that the continuous signal, in order to be digitized, is filtered with a filter arbitrarily close to the ideal one, find an expression for the mean-square error made in the computation of the wavelet transform. Discuss the implications of this result in the accuracy of signal processing operations carried out in the wavelet transform domain.
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