function r = drihaczekdist(f)
%DRIHACZEKDIST discrete Rihaczek distribution
% Usage r = drihaczekdist(f);
%
%
% DRIHACZEKDIST(f) computes a discrete Rihaczek distribution of vector
% f. The discrete Rihaczek distribution is computed by
%
% where k, l=0,...,L-1 and c is the Fourier transform of f.
%
% *WARNING**: The quadratic time-frequency distributions are highly
% redundant. For an input vector of length L, the quadratic time-frequency
% distribution will be a L xL matrix. If f is multichannel
% (LxW matrix), the resulting distributions are stacked along
% the third dimension such that the result is LxL xW cube.
%
% Url: http://ltfat.github.io/doc/quadratic/drihaczekdist.html
% Copyright (C) 2005-2023 Peter L. Soendergaard <peter@sonderport.dk> and others.
% This file is part of LTFAT version 2.6.0
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
% AUTHOR: Jordy van Velthoven
% TESTING: TEST_DRIHACZEKDIST
% REFERENCE: REF_DRIHACZEKDIST
complainif_notenoughargs(nargin, 1, 'DRIHACZEKDIST');
[f,Ls]=comp_sigreshape_pre(f,upper(mfilename));
c = dgt(f, f, 1, Ls);
r = dsft(c);