2 # Copyright 2001 Free Software Foundation, Inc.
4 # This file is part of GNU Radio
6 # GNU Radio is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 3, or (at your option)
11 # GNU Radio is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with GNU Radio; see the file COPYING. If not, write to
18 # the Free Software Foundation, Inc., 51 Franklin Street,
19 # Boston, MA 02110-1301, USA.
22 function plotfftavgk_db (all_data, k, sample_rate)
28 if ((m = nargchk (2,3,nargin)))
34 ##window = ones (len, 1);
35 #window = kaiser (len, 5);
36 window = hanning (len);
40 count = min (100, floor (length (all_data)/len));
43 data = all_data((k+i)*len + 1 : (k+i+1)*len);
44 s = s + abs (fft (data.*window));
49 incr = sample_rate/len;
51 if is_complex (all_data);
52 min_x = -sample_rate/2;
53 max_x = sample_rate/2 - incr;
56 y = 20 * log10(fftshift(s));
60 max_x = sample_rate/2 - incr;
63 y = 20 * log10(s(1:len/2));
69 i = find (y == max(y))