/usr/share/octave/packages/communications-1.1.1/fmdemod.m is in octave-communications-common 1.1.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | ## Copyright (C) 2007 Sylvain Pelissier <sylvain.pelissier@gmail.com>
##
## 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/>.
## -*- texinfo -*-
## @deftypefn {Function File} fmdemod (@var{x},@var{fc},@var{fs})
## Create the FM demodulation of the signal x with carrier frequency fs. Where x is sample at frequency fs.
## @seealso{ammod,amdemod,fmmod}
## @end deftypefn
function m = fmdemod(s,fc,fs)
if (nargin != 3)
usage ("fmdemod(x,fs,fc)");
endif
ds = diff(s);
m = amdemod(abs(ds),fc,fs);
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