Universal Weights for Maximally-Flat FIR Approximations of Amplitude Response: [1/ω]
Balbir Kumar, Ashwani Kumar, Deepankar Choudhury · IETE Journal of Research · 2000
An efficient design of linear phase, FIR structure for amplitude response, approximating [1/ω] (an integrating Hilbert transformer), suitable for the midband frequency range has been proposed. Mathematical formulas for computation of weights have been derived. These weights turn out to be invariant to the order of the filter, and are, therefore, universal in nature. This property is expoited to harness the proposed design with facility of variable orders of the sturcture maintaining the optimality criteria for all possible orders. A versatile structure for such a purpose has also been given.