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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* -*- c++ -*- */
/*
* Copyright 2011,2012 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 "kurtotic_equalizer_cc_impl.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>
namespace gr {
namespace digital {
kurtotic_equalizer_cc::sptr
kurtotic_equalizer_cc::make(int num_taps, float mu)
{
return gnuradio::get_initial_sptr
(new kurtotic_equalizer_cc_impl(num_taps, mu));
}
kurtotic_equalizer_cc_impl::kurtotic_equalizer_cc_impl(int num_taps, float mu)
: sync_decimator("kurtotic_equalizer_cc",
io_signature::make(1, 1, sizeof(gr_complex)),
io_signature::make(1, 1, sizeof(gr_complex)),
1),
filter::kernel::fir_filter_ccc(1, std::vector<gr_complex>(num_taps, gr_complex(0,0)))
{
set_gain(mu);
if(num_taps > 0)
d_taps[0] = 1.0;
set_taps(d_taps);
d_alpha_p = 0.01;
d_alpha_q = 0.01;
d_alpha_m = 0.01;
d_p = 0.0f;
d_m = 0.0f;
d_q = gr_complex(0,0);
d_u = gr_complex(0,0);
const int alignment_multiple =
volk_get_alignment() / sizeof(gr_complex);
set_alignment(std::max(1,alignment_multiple));
set_history(num_taps+1);
}
kurtotic_equalizer_cc_impl::~kurtotic_equalizer_cc_impl()
{
}
int
kurtotic_equalizer_cc_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];
int j = 0, k, l = d_taps.size();
for(int i = 0; i < noutput_items; i++) {
out[i] = filter(&in[j]);
// Adjust taps
d_error = error(out[i]);
for(k = 0; k < l; k++) {
update_tap(d_taps[l-k-1], in[j+k]);
}
j += decimation();
}
return noutput_items;
}
} /* namespace digital */
} /* namespace gr */
|
