dfdcheck.m

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

function goodspec = dfdcheck(speca,filnumb)

% dfdcheck.m  DFD check specification
% 0:56  9/3/99
%
%   Authors: Dejan V. Tosic, Miroslav D. Lutovac, 1999.03.08
%                 [e-mail]
%                 [e-mail]
%
%   Copyright (c) 1999 by Tosic & Lutovac
%   $Revision: 1.0 $  $Date: 1999/03/08 03:07:42 $
%
%   References:
%        Miroslav D. Lutovac, Dejan V. Tosic, Brian L. Evans
%           Advanced Filter Design for Signal Processing
%                   Using MATLAB and Mathematica

goodspec = 1;

if any(speca-abs(speca))
 goodspec = 0;
 disp('AFD ERROR in filter specification: Negative data.')
 return
end

if     filnumb==1
 if speca(1)>=speca(2)
  goodspec = 0;
  disp('AFD ERROR in lowpass spec: Fpass >= Fstop.')
 end
 if speca(2)>=0.5
  goodspec = 0;
  disp('AFD ERROR in lowpass spec: Fstop >= 0.5.')
 end
 if speca(3)>=speca(4)
  goodspec = 0;
  disp('AFD ERROR in lowpass spec: Apass >= Astop.')
 end

elseif filnumb==2
 if speca(1)>=speca(2)
  goodspec = 0;
  disp('AFD ERROR in highpass spec: Fstop >= Fpass.')
 end
 if speca(2)>=0.5
  goodspec = 0;
  disp('AFD ERROR in highpass spec: Fpass >= 0.5.')
 end
 if speca(3)>=speca(4)
  goodspec = 0;
  disp('AFD ERROR in highpass spec: Apass >= Astop.')
 end

elseif filnumb==3
 if speca(1)>=speca(2)
  goodspec = 0;
  disp('AFD ERROR in bandpass spec: Fstop1 >= Fpass1.')
 end
 if speca(2)>=speca(3)
  goodspec = 0;
  disp('AFD ERROR in bandpass spec: Fpass1 >= Fpass2.')
 end
 if speca(3)>=speca(4)
  goodspec = 0;
  disp('AFD ERROR in bandpass spec: Fpass2 >= Fstop2.')
 end
 if speca(4)>=0.5
  goodspec = 0;
  disp('AFD ERROR in bandpass spec: Fstop2 >= 0.5.')
 end
 if speca(6)>=speca(5)
  goodspec = 0;
  disp('AFD ERROR in bandpass spec: Apass >= Astop1.')
 end
 if speca(6)>=speca(7)
  goodspec = 0;
  disp('AFD ERROR in bandpass spec: Apass >= Astop2.')
 end

elseif filnumb==4
 if speca(1)>=speca(2)
  goodspec = 0;
  disp('AFD ERROR in bandreject spec: Fpass1 >= Fstop1.')
 end
 if speca(2)>=speca(3)
  goodspec = 0;
  disp('AFD ERROR in bandreject spec: Fstop1 >= Fstop2.')
 end
 if speca(3)>=speca(4)
  goodspec = 0;
  disp('AFD ERROR in bandreject spec: Fstop2 >= Fpass2.')
 end
 if speca(4)>=0.5
  goodspec = 0;
  disp('AFD ERROR in bandreject spec: Fpass2 >= 0.5.')
 end
 if speca(5)>=speca(6)
  goodspec = 0;
  disp('AFD ERROR in bandreject spec: Apass1 >= Astop.')
 end
 if speca(7)>=speca(6)
  goodspec = 0;
  disp('AFD ERROR in bandreject spec: Apass2 >= Astop.')
 end

else
 error(['AFD ERROR: Unsupported filter type ', num2str(filnumb), '.'])

end