?? remezex2.m
字號:
%
% Program name - REMEZ1.m
%
N=44
Fs=50000; % Sampling frequency % Filter length
Ap=1; % Pass band ripple in dB
As=45; % Stop band attenuation in dB
M=[0 0 1 1 0 0]; % Desired magnitude response
F=[0, 0.4, 0.48, 0.64, 0.72 1] ; % Band edge frequencies
dp=(10^(Ap/20)-1)/(10^(Ap/20)+1);
ds=10^(-As/20);
W=[dp/ds, 1, dp/ds];
dev=[ds ds dp dp ds ds ];
[b delta] = remez(N-1, F, M, W);% Compute the filter coefficients
[H, f] = freqz(b, 1, 1024, Fs); % Compute the frequency response
mag = 20*log10(abs(H)); % of filter and plot it
plot(f, mag), grid on
xlabel('Frequency (Hz)')
ylabel('Magnitude (dB)')
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