% Chapter 8: Example 8.27%            Chebyshev-1 Highpass Filter Design:%                Use of the CHEBY1HPF function%% Digital Highpass Filter Specifications:wp = 0.6*pi;                         % digital Passband freq in Hzws = 0.4586*pi;                      % digital Stopband freq in HzRp = 1;                              % Passband ripple in dBAs = 15;                             % Stopband attenuation in dB[b,a] = cheb1hpf(wp,ws,Rp,As);[C,B,A] = dir2cas(b,a)%%C = 0.0243%%B = 1.0000   -2.0000    1.0000%%    1.0000   -2.0000    1.0000%%A = 1.0000    1.0416    0.4019%%    1.0000    0.5561    0.7647