A Discrete-Event Network Simulator
API
spectrum-converter.cc
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1/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2/*
3 * Copyright (c) 2009 CTTC
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation;
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Author: Nicola Baldo <nbaldo@cttc.es>
19 */
20
21#include <ns3/spectrum-converter.h>
22#include <ns3/assert.h>
23#include <ns3/log.h>
24#include <algorithm>
25
26
27
28namespace ns3 {
29
30NS_LOG_COMPONENT_DEFINE ("SpectrumConverter");
31
33{
34}
35
37{
38 NS_LOG_FUNCTION (this);
39 m_fromSpectrumModel = fromSpectrumModel;
40 m_toSpectrumModel = toSpectrumModel;
41
42 size_t rowPtr = 0;
43 for (Bands::const_iterator toit = toSpectrumModel->Begin (); toit != toSpectrumModel->End (); ++toit)
44 {
45 size_t colInd = 0;
46 for (Bands::const_iterator fromit = fromSpectrumModel->Begin (); fromit != fromSpectrumModel->End (); ++fromit)
47 {
48 double c = GetCoefficient (*fromit, *toit);
49 NS_LOG_LOGIC ("(" << fromit->fl << "," << fromit->fh << ")"
50 << " --> " <<
51 "(" << toit->fl << "," << toit->fh << ")"
52 << " = " << c);
53 if (c > 0)
54 {
55 m_conversionMatrix.push_back (c);
56 m_conversionColInd.push_back (colInd);
57 rowPtr++;
58 }
59 colInd++;
60 }
61 m_conversionRowPtr.push_back (rowPtr);
62 }
63
64}
65
66
67double SpectrumConverter::GetCoefficient (const BandInfo& from, const BandInfo& to) const
68{
69 NS_LOG_FUNCTION (this);
70 double coeff = std::min (from.fh, to.fh) - std::max (from.fl, to.fl);
71 coeff = std::max (0.0, coeff);
72 coeff = std::min (1.0, coeff / (to.fh - to.fl));
73 return coeff;
74}
75
76
77
80{
81 NS_ASSERT ( *(fvvf->GetSpectrumModel ()) == *m_fromSpectrumModel);
82
83 Ptr<SpectrumValue> tvvf = Create<SpectrumValue> (m_toSpectrumModel);
84
85 Values::iterator tvit = tvvf->ValuesBegin ();
86 size_t i = 0; // Index of conversion coefficient
87
88 for (std::vector<size_t>::const_iterator convIt = m_conversionRowPtr.begin ();
89 convIt != m_conversionRowPtr.end ();
90 ++convIt)
91 {
92 double sum = 0;
93 while (i < *convIt)
94 {
95 sum += (*fvvf)[m_conversionColInd.at (i)] * m_conversionMatrix.at (i);
96 i++;
97 }
98 *tvit = sum;
99 ++tvit;
100 }
101
102 return tvvf;
103}
104
105
106
107
108
109} // namespace ns3
#define min(a, b)
Definition: 80211b.c:42
#define max(a, b)
Definition: 80211b.c:43
std::vector< double > m_conversionMatrix
matrix of conversion coefficients stored in Compressed Row Storage format
Ptr< const SpectrumModel > m_fromSpectrumModel
the SpectrumModel this SpectrumConverter instance can convert from
double GetCoefficient(const BandInfo &from, const BandInfo &to) const
Calculate the coefficient for value conversion between elements.
Ptr< const SpectrumModel > m_toSpectrumModel
the SpectrumModel this SpectrumConverter instance can convert to
Ptr< SpectrumValue > Convert(Ptr< const SpectrumValue > vvf) const
Convert a particular ValueVsFreq instance to.
std::vector< size_t > m_conversionRowPtr
offset of rows in m_conversionMatrix
std::vector< size_t > m_conversionColInd
column of each non-zero element in m_conversionMatrix
Bands::const_iterator End() const
Const Iterator to the model Bands container end.
Bands::const_iterator Begin() const
Const Iterator to the model Bands container start.
Values::iterator ValuesBegin()
#define NS_ASSERT(condition)
At runtime, in debugging builds, if this condition is not true, the program prints the source file,...
Definition: assert.h:67
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:206
#define NS_LOG_LOGIC(msg)
Use NS_LOG to output a message of level LOG_LOGIC.
Definition: log.h:290
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by ",...
Every class exported by the ns3 library is enclosed in the ns3 namespace.
The building block of a SpectrumModel.
double fl
lower limit of subband
double fh
upper limit of subband