SVD-based design and new structures for variable fractional-delay digital filters

The problem of designing one-dimensional variable fractional-delay digital filter, which can be reduced to the easier subproblems, that involve one dimensional constant filter designs and 1-D polynomial approximations are shown. One dimensional constant filters and one dimensional polynomials possess either symmetry or antisymmetry and therefore a VFD filter can be efficiently obtained by designing one dimensional constant filters with symmetrical or assymetrical approximations.