Ali Naci Akansu (born May 6, 1958) is a Turkish-American professor of electrical & computer engineering and scientist in applied mathematics.
He is best known for his contributions to the theory and applications of linear subspace methods including sub-band and wavelet transforms, particularly the binomial QMF[1][2] (also known as Daubechies wavelet) and the multivariate framework to design statistically optimized filter bank (eigen filter bank).
[12] He published the first wavelet-related engineering book in the literature entitled Multiresolution Signal Decomposition: Transforms, Subbands and Wavelets in 1992.
[13] He made contributions in the areas of optimal filter banks,[14][15][16][17][18][19] nonlinear phase extensions of discrete Walsh-Hadamard transform[20] and discrete Fourier transform,[21] principal component analysis of first-order autoregressive process,[22] sparse approximation,[23] digital watermarking,[24] [25] [26] [27] [28] [29] financial signal processing and quantitative finance.
He is an IEEE Fellow (since 2008) with the citation for contributions to optimal design of transforms and filter banks for communications and multimedia security.