Integer-Coefficient FIR Filter Sharpening for Equiripple Stopbands and Maximally Flat Passbands (Invited Paper)
J.O. Coleman · 2014
= xP ;n 1 (x) P ;n 2 (x): To include n = 2, set P ; 0 (x)=xP ; 1 (x) P ; 2 (x). Use (2) on the right to obtain P ; 0 (x)=x 2 2T 2( 1=2 x=2). Then use T2(x)= 2x 2 1 to obtain P ; 0 (x)=x 2 2 (2 1 x 2 =4 1) = 2 and thus an alternative, recursive definition