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 3, 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_ofdm_cyclic_prefixer.h>
28 #include <gr_io_signature.h>
30 gr_ofdm_cyclic_prefixer_sptr
31 gr_make_ofdm_cyclic_prefixer (size_t input_size, size_t output_size)
33 return gr_ofdm_cyclic_prefixer_sptr (new gr_ofdm_cyclic_prefixer (input_size, output_size));
36 gr_ofdm_cyclic_prefixer::gr_ofdm_cyclic_prefixer (size_t input_size, size_t output_size)
37 : gr_sync_interpolator ("ofdm_cyclic_prefixer",
38 gr_make_io_signature (1, 1, input_size*sizeof(gr_complex)),
39 gr_make_io_signature (1, 1, sizeof(gr_complex)),
41 d_input_size(input_size),
42 d_output_size(output_size)
48 gr_ofdm_cyclic_prefixer::work (int noutput_items,
49 gr_vector_const_void_star &input_items,
50 gr_vector_void_star &output_items)
52 gr_complex *in = (gr_complex *) input_items[0];
53 gr_complex *out = (gr_complex *) output_items[0];
54 size_t cp_size = d_output_size - d_input_size;
55 unsigned int i=0, j=0;
58 for(i=0; i < d_input_size; i++,j++) {
62 j = d_input_size - cp_size;
63 for(i=0; i < cp_size; i++, j++) {