A Discrete-Event Network Simulator
API
wifi-error-rate-models-test.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2016 University of Washington
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: Tom Henderson (tomhend@u.washington.edu)
19  */
20 
21 #include <cmath>
22 #include "ns3/test.h"
23 #include "ns3/nist-error-rate-model.h"
24 
25 using namespace ns3;
26 
27 double
28 FromRss (double rssDbw)
29 {
30  // SINR is based on receiver noise figure of 7 dB and thermal noise
31  // of -100.5522786 dBm in this 22 MHz bandwidth at 290K
32  double noisePowerDbw = -100.5522786 + 7;
33 
34  double sinrDb = rssDbw - noisePowerDbw;
35  // return SINR expressed as ratio
36  return pow (10.0, sinrDb / 10.0);
37 }
38 
45 class WifiErrorRateModelsTestCaseDsss : public TestCase
46 {
47 public:
48  WifiErrorRateModelsTestCaseDsss ();
49  virtual ~WifiErrorRateModelsTestCaseDsss ();
50 
51 private:
52  virtual void DoRun (void);
53 };
54 
55 WifiErrorRateModelsTestCaseDsss::WifiErrorRateModelsTestCaseDsss ()
56  : TestCase ("WifiErrorRateModel test case DSSS")
57 {
58 }
59 
60 WifiErrorRateModelsTestCaseDsss::~WifiErrorRateModelsTestCaseDsss ()
61 {
62 }
63 
64 void
65 WifiErrorRateModelsTestCaseDsss::DoRun (void)
66 {
67 
68  // 1024 bytes plus headers
69  uint64_t size = (1024 + 40 + 14) * 8;
70  // Spot test some values returned from DsssErrorRateModel
71  // Values taken from sample 80211b.c program used in validation paper
72  double value;
73  // DBPSK
74  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-105.0), size);
75  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0, 1e-13, "Not equal within tolerance");
76  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-100.0), size);
77  NS_TEST_ASSERT_MSG_EQ_TOL (value, 1.5e-13, 1e-13, "Not equal within tolerance");
78  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-99.0), size);
79  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.0003, 0.0001, "Not equal within tolerance");
80  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-98.0), size);
81  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.202, 0.005, "Not equal within tolerance");
82  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-97.0), size);
83  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.813, 0.005, "Not equal within tolerance");
84  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-96.0), size);
85  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.984, 0.005, "Not equal within tolerance");
86  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-95.0), size);
87  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.999, 0.001, "Not equal within tolerance");
88  value = DsssErrorRateModel::GetDsssDbpskSuccessRate (FromRss (-90.0), size);
89  NS_TEST_ASSERT_MSG_EQ_TOL (value, 1, 0.001, "Not equal within tolerance");
90 
91  // DQPSK
92  //
93  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-96.0), size);
94  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0, 1e-13, "Not equal within tolerance");
95  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-95.0), size);
96  NS_TEST_ASSERT_MSG_EQ_TOL (value, 4.5e-6, 1e-6, "Not equal within tolerance");
97  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-94.0), size);
98  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.036, 0.005, "Not equal within tolerance");
99  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-93.0), size);
100  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.519, 0.005, "Not equal within tolerance");
101  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-92.0), size);
102  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.915, 0.005, "Not equal within tolerance");
103  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-91.0), size);
104  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.993, 0.005, "Not equal within tolerance");
105  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-90.0), size);
106  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.999, 0.001, "Not equal within tolerance");
107  value = DsssErrorRateModel::GetDsssDqpskSuccessRate (FromRss (-89.0), size);
108  NS_TEST_ASSERT_MSG_EQ_TOL (value, 1, 0.001, "Not equal within tolerance");
109 
110 #ifdef HAVE_GSL
111  // DQPSK_CCK5.5
112  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-94.0), size);
113  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0, 1e-13, "Not equal within tolerance");
114  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-93.0), size);
115  NS_TEST_ASSERT_MSG_EQ_TOL (value, 6.6e-14, 5e-14, "Not equal within tolerance");
116  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-92.0), size);
117  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.0001, 0.00005, "Not equal within tolerance");
118  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-91.0), size);
119  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.132, 0.005, "Not equal within tolerance");
120  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-90.0), size);
121  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.744, 0.005, "Not equal within tolerance");
122  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-89.0), size);
123  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.974, 0.005, "Not equal within tolerance");
124  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-88.0), size);
125  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.999, 0.001, "Not equal within tolerance");
126  value = DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate (FromRss (-87.0), size);
127  NS_TEST_ASSERT_MSG_EQ_TOL (value, 1, 0.001, "Not equal within tolerance");
128 
129  // DQPSK_CCK11
130  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-91.0), size);
131  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0, 1e-14, "Not equal within tolerance");
132  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-90.0), size);
133  NS_TEST_ASSERT_MSG_EQ_TOL (value, 4.7e-14, 1e-14, "Not equal within tolerance");
134  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-89.0), size);
135  NS_TEST_ASSERT_MSG_EQ_TOL (value, 8.85e-5, 1e-5, "Not equal within tolerance");
136  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-88.0), size);
137  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.128, 0.005, "Not equal within tolerance");
138  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-87.0), size);
139  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.739, 0.005, "Not equal within tolerance");
140  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-86.0), size);
141  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.973, 0.005, "Not equal within tolerance");
142  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-85.0), size);
143  NS_TEST_ASSERT_MSG_EQ_TOL (value, 0.999, 0.001, "Not equal within tolerance");
144  value = DsssErrorRateModel::GetDsssDqpskCck11SuccessRate (FromRss (-84.0), size);
145  NS_TEST_ASSERT_MSG_EQ_TOL (value, 1, 0.001, "Not equal within tolerance");
146 #endif
147 }
148 
155 class WifiErrorRateModelsTestCaseNist : public TestCase
156 {
157 public:
158  WifiErrorRateModelsTestCaseNist ();
159  virtual ~WifiErrorRateModelsTestCaseNist ();
160 
161 private:
162  virtual void DoRun (void);
163 };
164 
165 WifiErrorRateModelsTestCaseNist::WifiErrorRateModelsTestCaseNist ()
166  : TestCase ("WifiErrorRateModel test case NIST")
167 {
168 }
169 
170 WifiErrorRateModelsTestCaseNist::~WifiErrorRateModelsTestCaseNist ()
171 {
172 }
173 
174 void
175 WifiErrorRateModelsTestCaseNist::DoRun (void)
176 {
177 
178  uint32_t FrameSize = 2000;
179  WifiTxVector txVector;
180  Ptr<NistErrorRateModel> nist = CreateObject<NistErrorRateModel> ();
181 
182  double ps; // probability of success
183  double snr; // dB
184 
185  // Spot test some values returned from NistErrorRateModel
186  // values can be generated by the example program ofdm-validation.cc
187  snr = 2.5;
188  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate6Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
189  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 2.04e-10, 1e-10, "Not equal within tolerance");
190  snr = 3.0;
191  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate6Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
192  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.020, 0.001, "Not equal within tolerance");
193  snr = 4.0;
194  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate6Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
195  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.885, 0.001, "Not equal within tolerance");
196  snr = 5.0;
197  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate6Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
198  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.997, 0.001, "Not equal within tolerance");
199 
200  snr = 6.0;
201  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate9Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
202  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.097, 0.001, "Not equal within tolerance");
203  snr = 7.0;
204  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate9Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
205  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.918, 0.001, "Not equal within tolerance");
206  snr = 8.0;
207  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate9Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
208  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.998, 0.001, "Not equal within tolerance");
209  snr = 9.0;
210  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate9Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
211  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
212 
213  snr = 6.0;
214  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate12Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
215  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.0174, 0.001, "Not equal within tolerance");
216  snr = 7.0;
217  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate12Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
218  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.881, 0.001, "Not equal within tolerance");
219  snr = 8.0;
220  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate12Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
221  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.997, 0.001, "Not equal within tolerance");
222  snr = 9.0;
223  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate12Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
224  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
225 
226  snr = 8.5;
227  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate18Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
228  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 2.85e-6, 1e-6, "Not equal within tolerance");
229  snr = 9.5;
230  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate18Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
231  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.623, 0.001, "Not equal within tolerance");
232  snr = 10.5;
233  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate18Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
234  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.985, 0.001, "Not equal within tolerance");
235  snr = 11.5;
236  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate18Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
237  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
238 
239  snr = 12.0;
240  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate24Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
241  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 2.22e-7, 1e-7, "Not equal within tolerance");
242  snr = 13.0;
243  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate24Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
244  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.495, 0.001, "Not equal within tolerance");
245  snr = 14.0;
246  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate24Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
247  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.974, 0.001, "Not equal within tolerance");
248  snr = 15.0;
249  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate24Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
250  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
251 
252  snr = 15.5;
253  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate36Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
254  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.012, 0.001, "Not equal within tolerance");
255  snr = 16.5;
256  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate36Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
257  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.818, 0.001, "Not equal within tolerance");
258  snr = 17.5;
259  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate36Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
260  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.993, 0.001, "Not equal within tolerance");
261  snr = 18.5;
262  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate36Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
263  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
264 
265  snr = 20.0;
266  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate48Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
267  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 1.3e-4, 1e-4, "Not equal within tolerance");
268  snr = 21.0;
269  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate48Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
270  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.649, 0.001, "Not equal within tolerance");
271  snr = 22.0;
272  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate48Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
273  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.983, 0.001, "Not equal within tolerance");
274  snr = 23.0;
275  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate48Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
276  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
277 
278  snr = 21.0;
279  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate54Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
280  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 5.44e-8, 1e-8, "Not equal within tolerance");
281  snr = 22.0;
282  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate54Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
283  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.410, 0.001, "Not equal within tolerance");
284  snr = 23.0;
285  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate54Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
286  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.958, 0.001, "Not equal within tolerance");
287  snr = 24.0;
288  ps = nist->GetChunkSuccessRate (WifiMode ("OfdmRate54Mbps"), txVector, std::pow (10.0, snr / 10.0), FrameSize * 8);
289  NS_TEST_ASSERT_MSG_EQ_TOL (ps, 0.999, 0.001, "Not equal within tolerance");
290 }
291 
298 class WifiErrorRateModelsTestSuite : public TestSuite
299 {
300 public:
301  WifiErrorRateModelsTestSuite ();
302 };
303 
304 WifiErrorRateModelsTestSuite::WifiErrorRateModelsTestSuite ()
305  : TestSuite ("wifi-error-rate-models", UNIT)
306 {
307  AddTestCase (new WifiErrorRateModelsTestCaseDsss, TestCase::QUICK);
308  AddTestCase (new WifiErrorRateModelsTestCaseNist, TestCase::QUICK);
309 }
310 
311 static WifiErrorRateModelsTestSuite wifiErrorRateModelsTestSuite;
312 
ns3::Ptr
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:73
ns3::WifiTxVector
This class mimics the TXVECTOR which is to be passed to the PHY in order to define the parameters whi...
Definition: wifi-tx-vector.h:61
wifiErrorRateModelsTestSuite
static WifiErrorRateModelsTestSuite wifiErrorRateModelsTestSuite
the test suite
Definition: wifi-error-rate-models-test.cc:311
ns3::TestSuite
A suite of tests to run.
Definition: test.h:1342
WifiErrorRateModelsTestCaseDsss::DoRun
virtual void DoRun(void)
Implementation to actually run this TestCase.
Definition: wifi-error-rate-models-test.cc:65
WifiErrorRateModelsTestCaseNist::DoRun
virtual void DoRun(void)
Implementation to actually run this TestCase.
Definition: wifi-error-rate-models-test.cc:175
ns3::NistErrorRateModel::GetChunkSuccessRate
double GetChunkSuccessRate(WifiMode mode, WifiTxVector txVector, double snr, uint64_t nbits) const
A pure virtual method that must be implemented in the subclass.
Definition: nist-error-rate-model.cc:276
ns3::TestCase
encapsulates test code
Definition: test.h:1155
FromRss
double FromRss(double rssDbw)
Definition: wifi-error-rate-models-test.cc:28
ns3::WifiMode
represent a single transmission modeA WifiMode is implemented by a single integer which is used to lo...
Definition: wifi-mode.h:97
ns3::TestCase::AddTestCase
void AddTestCase(TestCase *testCase, TestDuration duration=QUICK)
Add an individual child TestCase to this test suite.
Definition: test.cc:299
NS_TEST_ASSERT_MSG_EQ_TOL
#define NS_TEST_ASSERT_MSG_EQ_TOL(actual, limit, tol, msg)
Test that actual and expected (limit) values are equal to plus or minus some tolerance and report and...
Definition: test.h:380
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.
WifiErrorRateModelsTestCaseNist
Wifi Error Rate Models Test Case Nist.
Definition: wifi-error-rate-models-test.cc:155
WifiErrorRateModelsTestSuite
Wifi Error Rate Models Test Suite.
Definition: wifi-error-rate-models-test.cc:298
WifiErrorRateModelsTestCaseDsss
Wifi Error Rate Models Test Case Dsss.
Definition: wifi-error-rate-models-test.cc:45