dfddemo.m

AFD - Advanced Filter Design using MATLABMiroslav D. Lutovac, Dejan V. Tosicversion 1.00 released 15

% dfddemo.m  DFD demo specification and design D1 (script)
% 15:45  7/3/99
%
%   Authors: Dejan V. Tosic, Miroslav D. Lutovac, 1999.03.07
%                 [e-mail]
%                 [e-mail]
%
%   Copyright (c) 1999 by Tosic & Lutovac
%   $Revision: 1.0 $  $Date: 1999/03/07 03:07:42 $
%
%   References:
%        Miroslav D. Lutovac, Dejan V. Tosic, Brian L. Evans
%           Advanced Filter Design for Signal Processing
%                   Using MATLAB and Mathematica

%  calls:
%% dfda2k.m

% demo init spec
speca = [0.2 0.212 0.2 40];
filnumb = 1;
filtype = 'l';

speck = speca;
speck(3:4) = dfda2k(speca(3:4));

% demo design D1 parameters
desnumb = 1;
destype = 'D1';

nD = 8;
aD = 1.08155069576185;
eD =  0.217091;
fpD= 0.2;

numD = [0.02486430630874 0.02187331664743 0.07633088394268 ...
        0.06729427078353 0.10381314278932 0.06729427078353 ...
        0.07633088394268 0.02187331664743 0.02486430630874];

denD = [1 -2.98219203035993 6.06974818317651 ...
       -7.95485544794521  7.83507110290910 -5.53041664554408 ...
        2.83474731743684 -0.94319508831423 0.16691765211468];
nmin = 8;
nmax = 16;

nincmin = 0;
nincmax = 8;
ninc = 0;

zoomfmin = 0;
zoomfmax = 0.5;
zoomn = 100;

delete(gca);
if moreaxis
 delete(gca);
end
axis off;

text(0,0.9, 'DEMO (built-in) attenuation limits specification')
text(0,0.8, ['Fpass = ', num2str(speca(1))]);
text(0,0.7, ['Fstop = ', num2str(speca(2))]);
text(0,0.6, ['Apass = ', num2str(speca(3)), ' dB']);
text(0,0.5, ['Astop = ', num2str(speca(4)), ' dB']);
text(0,0.4, 'Fpass = passband edge frequency');
text(0,0.3, 'Fstop = stopband edge frequency')
text(0,0.2, 'Apass = maximum passband attenuation in dB')
text(0,0.1, 'Astop = minimum stopband attenuation in dB')
text(0,0, [num2str(nmin), ' <= n <= ', num2str(nmax), ...
                          '  is range of filter order'])

set(b16n,'String',['n=',num2str(nmin+ninc)]);

if fig2
set(eb8,'String',num2str(ninc));
set(et9,'String',[num2str(nincmin),'<=ninc<=',num2str(nincmax)]);
end