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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* -*- c++ -*- */
/*
* Copyright 2004,2006,2010-2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ofdm_cyclic_prefixer_impl.h"
#include <gr_io_signature.h>
namespace gr {
namespace digital {
ofdm_cyclic_prefixer::sptr
ofdm_cyclic_prefixer::make(size_t input_size, size_t output_size)
{
return gnuradio::get_initial_sptr
(new ofdm_cyclic_prefixer_impl(input_size, output_size));
}
ofdm_cyclic_prefixer_impl::ofdm_cyclic_prefixer_impl(size_t input_size,
size_t output_size)
: gr_sync_interpolator("ofdm_cyclic_prefixer",
gr_make_io_signature(1, 1, input_size*sizeof(gr_complex)),
gr_make_io_signature(1, 1, sizeof(gr_complex)),
output_size),
d_input_size(input_size),
d_output_size(output_size)
{
}
ofdm_cyclic_prefixer_impl::~ofdm_cyclic_prefixer_impl()
{
}
int
ofdm_cyclic_prefixer_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
gr_complex *in = (gr_complex*)input_items[0];
gr_complex *out = (gr_complex*)output_items[0];
size_t cp_size = d_output_size - d_input_size;
unsigned int i=0, j=0;
j = cp_size;
for(i=0; i < d_input_size; i++,j++) {
out[j] = in[i];
}
j = d_input_size - cp_size;
for(i=0; i < cp_size; i++, j++) {
out[i] = in[j];
}
return d_output_size;
}
} /* namespace digital */
} /* namespace gr */
|
