Improving magnitude response in two-stage corrector comb structure
Gordana Jovanović Doleček, Lyda Herrera Sepulveda · 2017
This paper proposes methods for improving of magnitude response in a two-stage corrector filter structure. The corrector filters improve the comb passband and stopband characteristic in all odd folding bands. We propose here two methods to improve the stopband characteristic in all folding bands, while keeping a low passband deviation. The first proposed method is based on introducing additional zeros in the center of all even folding bands. The second method separates double zeros within all even folding bands. In both cases the resulting structure is multiplierless. We contrast the proposed methods with some existing methods to demonstrate the benefits of the proposed design technique in aliasing rejection.