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
|
/*
* Copyright (C) 2003 by Jonathan Naylor G4KLX/HB9DRD
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "NoisyNCO.h"
#include <cmath>
using namespace std;
#include <wx/log.h>
#include <wx/debug.h>
CNoisyNCO::CNoisyNCO(int rate, double stdDev) :
m_rate(rate),
m_stdDev(stdDev),
m_dds(0.0),
m_gaussian()
{
wxASSERT(m_rate > 0);
}
CNoisyNCO::~CNoisyNCO()
{
}
void CNoisyNCO::generate(double frequency, double* output, int length)
{
wxASSERT(output != NULL);
wxASSERT(length > 0);
double ddsInc = (::fabs(frequency) * 2.0 * M_PI) / double(m_rate);
for (int i = 0; i < length; i++) {
output[i] = ::sin(m_dds + m_gaussian.rand(0.0, m_stdDev));
m_dds += ddsInc;
}
}
void CNoisyNCO::generate(double frequency, complex<double>* output, int length)
{
wxASSERT(output != NULL);
wxASSERT(length > 0);
double ddsInc = (::fabs(frequency) * 2.0 * M_PI) / double(m_rate);
for (int i = 0; i < length; i++) {
double theta = m_gaussian.rand(0.0, m_stdDev);
double cosVal = ::cos(m_dds + theta);
double sinVal = ::sin(m_dds + theta);
m_dds += ddsInc;
if (frequency < 0.0)
output[i] = complex<double>(sinVal, cosVal);
else
output[i] = complex<double>(cosVal, sinVal);
}
}
|
