highpass.m

802.15 dsss 物理协议层方针代码

function Hd = highpass
%HIGHPASS Returns a discrete-time filter object

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% M-File generated by MATLAB(R) 7.0 and the Signal Processing Toolbox 6.2.
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% Generated on: 22-Feb-2005 16:58:00
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% Equiripple Highpass filter designed using the FIRPM function.

% All frequency values are normalized to 1.

Fstop = 0.15;            % Stopband Frequency
Fpass = 0.2;             % 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], [0 1], [Dstop, Dpass]);

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


% [EOF]