Comments on regular half-band filter design via Bernstein polynomial expansions
Christopher J. Zarowski · 2002
This paper considers certain aspects of half-band filter design based upon Bernstein polynomial expansions originally due to Caglar and Akansu (1993). The Bernstein polynomial approach lends itself to design under a least-squares constraint which can lead to an eigenproblem as shown by Cooklev (1995). Certain numerical difficulties with this method are considered, and a simple way of alleviating them via a DFT/FFT method is shown. It will also be shown that the eigenproblem may be readily replaced by a simpler matrix inverse problem.