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mkhighpass

PURPOSE ^

MKHIGHPASS return a high pass filter mfir(). A Butterworth filter is used.

SYNOPSIS ^

function f = mkhighpass(f, pl)

DESCRIPTION ^

 MKHIGHPASS return a high pass filter mfir(). A Butterworth filter is used.
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 DESCRIPTION: MKHIGHPASS return a high pass filter mfir().
              A Butterworth filter is used.

 CALL:        f = mkhighpass(f, pl)

 VERSION: $Id: mkhighpass.m,v 1.3 2008/08/06 15:03:49 ingo Exp $

 HISTORY: 27-08-2002 M Hewitson
             Creation

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CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 % MKHIGHPASS return a high pass filter mfir(). A Butterworth filter is used.
0002 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0003 %
0004 % DESCRIPTION: MKHIGHPASS return a high pass filter mfir().
0005 %              A Butterworth filter is used.
0006 %
0007 % CALL:        f = mkhighpass(f, pl)
0008 %
0009 % VERSION: $Id: mkhighpass.m,v 1.3 2008/08/06 15:03:49 ingo Exp $
0010 %
0011 % HISTORY: 27-08-2002 M Hewitson
0012 %             Creation
0013 %
0014 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0015 
0016 function f = mkhighpass(f, pl)
0017 
0018   g     = find(pl, 'gain');
0019   fc    = find(pl, 'fc');
0020   fs    = find(pl, 'fs');
0021   order = find(pl, 'order');
0022   win   = find(pl, 'Win');
0023 
0024   if(fc(1) > fs/2)
0025     error('fc must be < fs/2');
0026   end
0027 
0028 
0029   f.name     = 'std highpass';
0030   f.fs       = fs;
0031   f.a        = g.*fir1(order, 2*fc/fs, 'high', win.win);
0032   f.gd       = (f.ntaps)/2;
0033   f.histout  = zeros(1,f.ntaps-1);   % initialise output history
0034 
0035 
0036

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