function dsi = dfddsi(n,speck)

% dfddsi.m  ADFD design subspace
% ds(i) = {i, ksimin, ksimax, epsilonmin, epsilonmax, fpmin, fpmax}
%
% 16:57  17/2/99
%
%   Authors: Dejan V. Tosic, Miroslav D. Lutovac, 1999.02.08
%                 tosic@telekom.etf.bg.ac.yu
%                 lutovac@galeb.etf.bg.ac.yu
%
%   Copyright (c) 1999 by Tosic & Lutovac
%   $Revision: 1.0 $  $Date: 1999/02/08 03:07:42 $
%
%   References:
%        Miroslav D. Lutovac, Dejan V. Tosic, Brian L. Evans
%           Advanced Filter Design for Signal Processing
%                   Using MATLAB and Mathematica
%  calls:
%% dfdxmin.m, dfdxmax.m, dfdl.m

Fp = speck(1);
Fs = speck(2);
Kp = speck(3);
Ks = speck(4);

xmin = dfdxmin(n, Kp, Ks);
xmax = dfdxmax(n, Fp, Fs, Kp, Ks);
emin  = Ks/dfdl(n,xmax);
emax  = Kp;
fpmin = Fs/xmax;
fpmax = Fs/xmin;

dsi = [n xmin xmax emin emax fpmin fpmax];