Home > classes > @mfir > private > mkhighpass.m

mkhighpass

PURPOSE ^

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

SYNOPSIS ^

function f = mkhighpass(f, pl)

DESCRIPTION ^

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

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

 CALL:        f = mkhighpass(f, pl)

 VERSION: $Id: mkhighpass.m,v 1.3 2007/08/16 12:15:01 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 function f = mkhighpass(f, pl)
0002 % MKHIGHPASS return a high pass filter miir(). A Butterworth filter is used.
0003 %
0004 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0005 %
0006 % DESCRIPTION: MKHIGHPASS return a high pass filter miir().
0007 %              A Butterworth filter is used.
0008 %
0009 % CALL:        f = mkhighpass(f, pl)
0010 %
0011 % VERSION: $Id: mkhighpass.m,v 1.3 2007/08/16 12:15:01 ingo Exp $
0012 %
0013 % HISTORY: 27-08-2002 M Hewitson
0014 %             Creation
0015 %
0016 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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.ntaps    = order+1;
0032 f.a        = fir1(order, 2*fc/fs, 'high', win.win);
0033 f.gd       = (f.ntaps)/2;
0034 f.g        = g;
0035 f.histout  = zeros(1,f.ntaps-1);   % initialise output history
0036 
0037 
0038 % END
0039

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