From the mathematical point of view, is to construct a wavelet orthogonal basis function space the basic unit of energy is limited in space L2 (R) function to meet the permit conditions, such wavelets need to know L2 (R) space for the basics, especially in the inner product space in the space decomposition, such as the basics of function transformation. From the perspective of signal processing, wavelet (transform) is a powerful time-frequency analysis (processing) tools, is to overcome the shortcomings of the Fourier transform on the basis of evolved, so from the perspective of wavelet signal processing, need to Fourier transform, Fourier series, filters and other basics.

小波分析基础学习资料.ppt

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