A model for the error rate for different modulations. More...

#include "nist-error-rate-model.h"

Inheritance diagram for ns3::NistErrorRateModel:

Collaboration diagram for ns3::NistErrorRateModel:

Public Member Functions
	NistErrorRateModel ()

Public Member Functions inherited from ns3::ErrorRateModel
virtual int64_t	AssignStreams (int64_t stream)
	Assign a fixed random variable stream number to the random variables used by this model. More...

double	CalculateSnr (const WifiTxVector &txVector, double ber) const

double	GetChunkSuccessRate (WifiMode mode, const WifiTxVector &txVector, double snr, uint64_t nbits, uint8_t numRxAntennas=1, WifiPpduField field=WIFI_PPDU_FIELD_DATA, uint16_t staId=SU_STA_ID) const
	This method returns the probability that the given 'chunk' of the packet will be successfully received by the PHY. More...

virtual bool	IsAwgn () const

Public Member Functions inherited from ns3::Object
	Object ()
	Constructor. More...

	~Object () override
	Destructor. More...

void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together. More...

void	Dispose ()
	Dispose of this Object. More...

AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one. More...

TypeId	GetInstanceTypeId () const override
	Get the most derived TypeId for this Object. More...

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object. More...

template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object. More...

template<typename T >
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId. More...

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object. More...

void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one. More...

bool	IsInitialized () const
	Check if the object has been initialized. More...

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor. More...

	SimpleRefCount (const SimpleRefCount &o[[maybe_unused]])
	Copy constructor. More...

uint32_t	GetReferenceCount () const
	Get the reference count of the object. More...

SimpleRefCount &	operator= (const SimpleRefCount &o[[maybe_unused]])
	Assignment operator. More...

void	Ref () const
	Increment the reference count. More...

void	Unref () const
	Decrement the reference count. More...

Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor. More...

void	GetAttribute (std::string name, AttributeValue &value) const
	Get the value of an attribute, raising fatal errors if unsuccessful. More...

bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors. More...

void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful. More...

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors. More...

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context. More...

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context. More...

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context. More...

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context. More...

Static Public Member Functions
static TypeId	GetTypeId ()
	Get the type ID. More...

Static Public Member Functions inherited from ns3::ErrorRateModel
static TypeId	GetTypeId ()
	Get the type ID. More...

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type. More...

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID. More...

Private Member Functions
double	CalculatePe (double p, uint8_t bValue) const
	Return the coded BER for the given p and b. More...

double	DoGetChunkSuccessRate (WifiMode mode, const WifiTxVector &txVector, double snr, uint64_t nbits, uint8_t numRxAntennas, WifiPpduField field, uint16_t staId) const override
	A pure virtual method that must be implemented in the subclass. More...

double	GetBpskBer (double snr) const
	Return BER of BPSK at the given SNR. More...

uint8_t	GetBValue (WifiCodeRate codeRate) const
	Return the bValue such that coding rate = bValue / (bValue + 1). More...

double	GetFecBpskBer (double snr, uint64_t nbits, uint8_t bValue) const
	Return BER of BPSK at the given SNR after applying FEC. More...

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. More...

double	GetFecQpskBer (double snr, uint64_t nbits, uint8_t bValue) const
	Return BER of QPSK at the given SNR after applying FEC. More...

double	GetQamBer (uint16_t constellationSize, double snr) const
	Return BER of QAM for a given constellation size at the given SNR. More...

double	GetQpskBer (double snr) const
	Return BER of QPSK at the given SNR. More...

Additional Inherited Members
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object. More...

virtual void	DoDispose ()
	Destructor implementation. More...

virtual void	DoInitialize ()
	Initialize() implementation. More...

virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated. More...

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes. More...

virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed. More...

Related Functions inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly. More...

Detailed Description

A model for the error rate for different modulations.

For OFDM modulation, the model description and validation can be found in http://www.nsnam.org/~pei/80211ofdm.pdf. For DSSS modulations (802.11b), the model uses the DsssErrorRateModel.

Definition at line 37 of file nist-error-rate-model.h.

Constructor & Destructor Documentation

◆ NistErrorRateModel()

ns3::NistErrorRateModel::NistErrorRateModel ( )

Definition at line 47 of file nist-error-rate-model.cc.

Member Function Documentation

◆ CalculatePe()

double ns3::NistErrorRateModel::CalculatePe	(	double	p,
		uint8_t	bValue
	)		const

private

Return the coded BER for the given p and b.

Parameters

p	the SNR ratio (in linear scale)
bValue	such that coding rate = bValue / (bValue + 1)

Returns: the coded BER

Definition at line 115 of file nist-error-rate-model.cc.

References NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by GetFecBpskBer(), GetFecQamBer(), and GetFecQpskBer().

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◆ DoGetChunkSuccessRate()

double ns3::NistErrorRateModel::DoGetChunkSuccessRate	(	WifiMode	mode,
		const WifiTxVector &	txVector,
		double	snr,
		uint64_t	nbits,
		uint8_t	numRxAntennas,
		WifiPpduField	field,
		uint16_t	staId
	)		const

overrideprivatevirtual

A pure virtual method that must be implemented in the subclass.

Parameters

mode	the Wi-Fi mode applicable to this chunk
txVector	TXVECTOR of the overall transmission
snr	the SNR of the chunk
nbits	the number of bits in this chunk
numRxAntennas	the number of active RX antennas
field	the PPDU field to which the chunk belongs to
staId	the station ID for MU

Returns: probability of successfully receiving the chunk

Implements ns3::ErrorRateModel.

Definition at line 205 of file nist-error-rate-model.cc.

References GetBValue(), ns3::WifiMode::GetCodeRate(), ns3::WifiMode::GetConstellationSize(), GetFecBpskBer(), GetFecQamBer(), GetFecQpskBer(), ns3::WifiMode::GetModulationClass(), NS_LOG_FUNCTION, and ns3::WIFI_MOD_CLASS_ERP_OFDM.

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◆ GetBpskBer()

double ns3::NistErrorRateModel::GetBpskBer ( double snr ) const

private

Return BER of BPSK at the given SNR.

Parameters

snr	SNR ratio (in linear scale)

Returns: BER of BPSK at the given SNR

Definition at line 52 of file nist-error-rate-model.cc.

References NS_LOG_FUNCTION, and NS_LOG_INFO.

Referenced by GetFecBpskBer().

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◆ GetBValue()

uint8_t ns3::NistErrorRateModel::GetBValue ( WifiCodeRate codeRate ) const

private

Return the bValue such that coding rate = bValue / (bValue + 1).

Parameters

codeRate the coding rate

Returns: the bValue such that coding rate = bValue / (bValue + 1)

Definition at line 184 of file nist-error-rate-model.cc.

References NS_FATAL_ERROR, ns3::WIFI_CODE_RATE_1_2, ns3::WIFI_CODE_RATE_2_3, ns3::WIFI_CODE_RATE_3_4, ns3::WIFI_CODE_RATE_5_6, and ns3::WIFI_CODE_RATE_UNDEFINED.

Referenced by DoGetChunkSuccessRate().

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◆ GetFecBpskBer()

double ns3::NistErrorRateModel::GetFecBpskBer	(	double	snr,
		uint64_t	nbits,
		uint8_t	bValue
	)		const

private

Return BER of BPSK at the given SNR after applying FEC.

Parameters

snr	SNR ratio (in linear scale)
nbits	the number of bits in the chunk
bValue	the bValue such that coding rate = bValue / (bValue + 1)

Returns: BER of BPSK at the given SNR after applying FEC

Definition at line 85 of file nist-error-rate-model.cc.

References CalculatePe(), GetBpskBer(), min, and NS_LOG_FUNCTION.

Referenced by DoGetChunkSuccessRate().

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◆ GetFecQamBer()

double ns3::NistErrorRateModel::GetFecQamBer	(	uint16_t	constellationSize,
		double	snr,
		uint64_t	nbits,
		uint8_t	bValue
	)		const

private

Return BER of QAM for a given constellation size at the given SNR after applying FEC.

Parameters

constellationSize	the constellation size (M)
snr	SNR ratio (in linear scale)
nbits	the number of bits in the chunk
bValue	the bValue such that coding rate = bValue / (bValue + 1)