3 * Copyright 2004,2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
27 #include <gr_adaptive_fir_ccf.h>
28 #include <gr_io_signature.h>
30 gr_adaptive_fir_ccf::gr_adaptive_fir_ccf(char *name, int decimation, const std::vector<float> &taps)
31 : gr_sync_decimator (name,
32 gr_make_io_signature (1, 1, sizeof(gr_complex)),
33 gr_make_io_signature (1, 1, sizeof(gr_complex)),
38 set_history(d_taps.size());
41 void gr_adaptive_fir_ccf::set_taps(const std::vector<float> &taps)
47 int gr_adaptive_fir_ccf::work(int noutput_items,
48 gr_vector_const_void_star &input_items,
49 gr_vector_void_star &output_items)
51 gr_complex *in = (gr_complex *)input_items[0];
52 gr_complex *out = (gr_complex *)output_items[0];
56 set_history(d_taps.size());
58 return 0; // history requirements may have changed.
61 int j = 0, k, l = d_taps.size();
62 for (int i = 0; i < noutput_items; i++) {
63 // Generic dot product of d_taps[] and in[]
64 gr_complex sum(0.0, 0.0);
65 for (k = 0; k < l; k++)
66 sum += d_taps[l-k-1]*in[j+k];
71 for (k = 0; k < l; k++) {
72 //printf("%f ", d_taps[k]);
73 update_tap(d_taps[l-k-1], in[j+k]);