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

mklowpass

PURPOSE ^

MKLOWPASS return a low pass filter mfir().

SYNOPSIS ^

function f = mklowpass(f, pl)

DESCRIPTION ^

 MKLOWPASS return a low pass filter mfir().

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 DESCRIPTION: MKLOWPASS return a low pass filter mfir().

 CALL:        f = mklowpass(f, pl)

 VERSION: $Id: mklowpass.html,v 1.14 2008/03/31 10:27:40 hewitson 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 = mklowpass(f, pl)
0002 % MKLOWPASS return a low pass filter mfir().
0003 %
0004 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0005 %
0006 % DESCRIPTION: MKLOWPASS return a low pass filter mfir().
0007 %
0008 % CALL:        f = mklowpass(f, pl)
0009 %
0010 % VERSION: $Id: mklowpass.html,v 1.14 2008/03/31 10:27:40 hewitson Exp $
0011 %
0012 % HISTORY: 27-08-2002 M Hewitson
0013 %             Creation
0014 %
0015 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0016 
0017 g     = find(pl, 'gain');
0018 fc    = find(pl, 'fc');
0019 fs    = find(pl, 'fs');
0020 order = find(pl, 'order');
0021 win   = find(pl, 'Win');
0022 
0023 if(fc(1) > fs/2)
0024   error('fc must be < fs/2');
0025 end
0026 
0027 f.name     = 'std lowpass';
0028 f.fs       = fs;
0029 f.ntaps    = order+1;
0030 f.a        = fir1(order, 2*fc/fs, 'low', win.win);
0031 f.gd       = (f.ntaps)/2;
0032 f.gain     = g;
0033 f.histout  = zeros(1,f.ntaps-1);   % initialise output history
0034 
0035 % END
0036

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