high.m

滤波器的设计以及零极点对应频率响应分析

function Hd = high
%HIGH Returns a discrete-time filter object.

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% M-File generated by MATLAB(R) 7.1 and the Signal Processing Toolbox 6.4.
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% Generated on: 13-Oct-2008 16:53:50
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% Equiripple Highpass filter designed using the FIRPM function.

% All frequency values are in Hz.
Fs = 100;  % Sampling Frequency

Fstop = 0.4;             % Stopband Frequency
Fpass = 0.5;             % Passband Frequency
Dstop = 0.0001;          % Stopband Attenuation
Dpass = 0.057501127785;  % Passband Ripple
dens  = 20;              % Density Factor

% Calculate the order from the parameters using FIRPMORD.
[N, Fo, Ao, W] = firpmord([Fstop, Fpass]/(Fs/2), [0 1], [Dstop, Dpass]);

% Calculate the coefficients using the FIRPM function.
b  = firpm(N, Fo, Ao, W, {dens});
Hd = b;


% [EOF]