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From: Viral Doshi on 19 Mar 2010 18:08
Hello,
I have a project where I need to use a band pass filter and need a signal to go through it.
Using FDA tools, I have created a Equirpple Band Pass Filter. I generated a M-File for this band pass filter....here is the file

function Hd = bfp1to5
%BFP1TO5 Returns a discrete-time filter object.

%
% M-File generated by MATLAB(R) 7.8 and the Signal Processing Toolbox 6.11.
%
% Generated on: 16-Mar-2010 23:19:07
%

% Equiripple Bandpass filter designed using the FIRPM function.

% All frequency values are in kHz.
Fs = 20; % Sampling Frequency

Fstop1 = 1; % First Stopband Frequency
Fpass1 = 1.5; % First Passband Frequency
Fpass2 = 4.5; % Second Passband Frequency
Fstop2 = 5; % Second Stopband Frequency
Dstop1 = 0.0001; % First Stopband Attenuation
Dpass = 0.057501127785; % Passband Ripple
Dstop2 = 0.0001; % Second Stopband Attenuation
dens = 20; % Density Factor

% Calculate the order from the parameters using FIRPMORD.
[N, Fo, Ao, W] = firpmord([Fstop1 Fpass1 Fpass2 Fstop2]/(Fs/2), [0 1 ...
0], [Dstop1 Dpass Dstop2]);

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

% [EOF]

I have used Simulink to have a variable coming from workplace going through and a variable coming out to the workplace.
If I had to write a program to do the job rather than having a simulink, how can I take a signal, call this function and have a output?

Any help would be highly appreciated

V
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