39 .SetGroupName (
"Wifi")
53 double z = std::sqrt (snr);
54 double ber = 0.5 * erfc (z);
63 double z = std::sqrt (snr / 2.0);
64 double ber = 0.5 * erfc (z);
73 NS_ASSERT (std::bitset<16> (constellationSize).count () == 1);
74 double z = std::sqrt (snr / ((2 * (constellationSize - 1)) / 3));
75 uint8_t bitsPerSymbol = std::sqrt (constellationSize);
76 double ber = ((bitsPerSymbol - 1) / (bitsPerSymbol * std::log2 (bitsPerSymbol))) * erfc (z);
77 NS_LOG_INFO (constellationSize <<
"-QAM: snr=" << snr <<
" ber=" << ber);
92 double pms = std::pow (1 - pe, nbits);
107 double pms = std::pow (1 - pe, nbits);
115 double D = std::sqrt (4.0 * p * (1.0 - p));
120 pe = 0.5 * (36.0 * std::pow (D, 10)
121 + 211.0 * std::pow (D, 12)
122 + 1404.0 * std::pow (D, 14)
123 + 11633.0 * std::pow (D, 16)
124 + 77433.0 * std::pow (D, 18)
125 + 502690.0 * std::pow (D, 20)
126 + 3322763.0 * std::pow (D, 22)
127 + 21292910.0 * std::pow (D, 24)
128 + 134365911.0 * std::pow (D, 26));
130 else if (bValue == 2)
133 pe = 1.0 / (2.0 * bValue) *
134 (3.0 * std::pow (D, 6)
135 + 70.0 * std::pow (D, 7)
136 + 285.0 * std::pow (D, 8)
137 + 1276.0 * std::pow (D, 9)
138 + 6160.0 * std::pow (D, 10)
139 + 27128.0 * std::pow (D, 11)
140 + 117019.0 * std::pow (D, 12)
141 + 498860.0 * std::pow (D, 13)
142 + 2103891.0 * std::pow (D, 14)
143 + 8784123.0 * std::pow (D, 15));
145 else if (bValue == 3)
148 pe = 1.0 / (2.0 * bValue) *
149 (42.0 * std::pow (D, 5)
150 + 201.0 * std::pow (D, 6)
151 + 1492.0 * std::pow (D, 7)
152 + 10469.0 * std::pow (D, 8)
153 + 62935.0 * std::pow (D, 9)
154 + 379644.0 * std::pow (D, 10)
155 + 2253373.0 * std::pow (D, 11)
156 + 13073811.0 * std::pow (D, 12)
157 + 75152755.0 * std::pow (D, 13)
158 + 428005675.0 * std::pow (D, 14));
160 else if (bValue == 5)
164 pe = 1.0 / (2.0 * bValue) *
165 (92.0 * std::pow (D, 4.0)
166 + 528.0 * std::pow (D, 5.0)
167 + 8694.0 * std::pow (D, 6.0)
168 + 79453.0 * std::pow (D, 7.0)
169 + 792114.0 * std::pow (D, 8.0)
170 + 7375573.0 * std::pow (D, 9.0)
171 + 67884974.0 * std::pow (D, 10.0)
172 + 610875423.0 * std::pow (D, 11.0)
173 + 5427275376.0 * std::pow (D, 12.0)
174 + 47664215639.0 * std::pow (D, 13.0));
186 NS_LOG_FUNCTION (
this << constellationSize << snr << nbits << +bValue);
187 double ber =
GetQamBer (constellationSize, snr);
194 double pms = std::pow (1 - pe, nbits);
double GetQamBer(uint16_t constellationSize, double snr) const
Return BER of QAM for a given constellation size at the given SNR.
static TypeId GetTypeId(void)
Get the type ID.
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by "...
This class mimics the TXVECTOR which is to be passed to the PHY in order to define the parameters whi...
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
WifiCodeRate
This enumeration defines the various convolutional coding rates used for the OFDM transmission modes ...
#define NS_ASSERT(condition)
At runtime, in debugging builds, if this condition is not true, the program prints the source file...
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
#define NS_FATAL_ERROR(msg)
Report a fatal error with a message and terminate.
double GetFecQpskBer(double snr, uint64_t nbits, uint8_t bValue) const
Return BER of QPSK at the given SNR after applying FEC.
double GetFecQamBer(uint16_t constellationSize, double snr, uint64_t nbits, uint8_t bValue) const
Return BER of QAM for a given constellation size at the given SNR after applying FEC.
represent a single transmission modeA WifiMode is implemented by a single integer which is used to lo...
the interface for Wifi's error models
double GetFecBpskBer(double snr, uint64_t nbits, uint8_t bValue) const
Return BER of BPSK at the given SNR after applying FEC.
uint8_t GetBValue(WifiCodeRate codeRate) const
Return the bValue such that coding rate = bValue / (bValue + 1).
A model for the error rate for different modulations.
WifiModulationClass GetModulationClass() const
double CalculatePe(double p, uint8_t bValue) const
Return the coded BER for the given p and b.
double DoGetChunkSuccessRate(WifiMode mode, WifiTxVector txVector, double snr, uint64_t nbits) const
A pure virtual method that must be implemented in the subclass.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
uint16_t GetConstellationSize(void) const
No explicit coding (e.g., DSSS rates)
double GetQpskBer(double snr) const
Return BER of QPSK at the given SNR.
WifiCodeRate GetCodeRate(void) const
double GetBpskBer(double snr) const
Return BER of BPSK at the given SNR.
a unique identifier for an interface.
TypeId SetParent(TypeId tid)
Set the parent TypeId.