Base class for gray coded rectangular quadrature amplitude modulations. More...

#include <MqamModulationBase.h>

Inheritance diagram for inet::physicallayer::MqamModulationBase:

Public Member Functions
	MqamModulationBase (double normalizationFactor, const std::vector< ApskSymbol > *constellation)

virtual double	getNormalizationFactor () const

virtual double	calculateSER (double snir, Hz bandwidth, bps bitrate) const override
	Returns the symbol error rate as a function of the signal to noise and interference ratio, the bandwidth, and the gross (physical) bitrate. More...

virtual double	calculateBER (double snir, Hz bandwidth, bps bitrate) const override
	Returns the bit error rate as a function of the signal to noise and interference ratio, the bandwidth, and the gross (physical) bitrate. More...

Public Member Functions inherited from inet::physicallayer::ApskModulationBase
	ApskModulationBase (const std::vector< ApskSymbol > *constellation)

virtual std::ostream &	printToStream (std::ostream &stream, int level, int evFlags=0) const override
	Prints this object to the provided output stream. More...

virtual const std::vector< ApskSymbol > *	getConstellation () const

virtual unsigned int	getConstellationSize () const override

virtual unsigned int	getCodeWordSize () const override

virtual const ApskSymbol *	mapToConstellationDiagram (const ShortBitVector &symbol) const

virtual ShortBitVector	demapToBitRepresentation (const ApskSymbol *symbol) const

Public Member Functions inherited from inet::IPrintableObject
virtual	~IPrintableObject ()

virtual std::string	printToString () const

virtual std::string	printToString (int level, int evFlags=0) const

virtual std::string	getInfoStringRepresentation (int evFlags=0) const

virtual std::string	getDetailStringRepresentation (int evFlags=0) const

virtual std::string	getDebugStringRepresentation (int evFlags=0) const

virtual std::string	getTraceStringRepresentation (int evFlags=0) const

virtual std::string	getCompleteStringRepresentation (int evFlags=0) const

Protected Attributes
double	normalizationFactor = NaN

Protected Attributes inherited from inet::physicallayer::ApskModulationBase
const std::vector< ApskSymbol > *	constellation

const unsigned int	codeWordSize

const unsigned int	constellationSize

Additional Inherited Members
Public Types inherited from inet::IPrintableObject
enum	PrintLevel { PRINT_LEVEL_TRACE, PRINT_LEVEL_DEBUG, PRINT_LEVEL_DETAIL, PRINT_LEVEL_INFO, PRINT_LEVEL_COMPLETE = INT_MIN }

enum	PrintFlag { PRINT_FLAG_FORMATTED = (1 << 0), PRINT_FLAG_MULTILINE = (1 << 1) }

Static Public Member Functions inherited from inet::physicallayer::ApskModulationBase
const static ApskModulationBase *	findModulation (const char *name)

Detailed Description

Base class for gray coded rectangular quadrature amplitude modulations.

Constructor & Destructor Documentation

◆ MqamModulationBase()

inet::physicallayer::MqamModulationBase::MqamModulationBase	(	double	normalizationFactor,
		const std::vector< ApskSymbol > *	constellation
	)

                                                                                                              :
     ApskModulationBase(constellation),
     normalizationFactor(normalizationFactor)
 {
 }

Member Function Documentation

◆ calculateBER()

double inet::physicallayer::MqamModulationBase::calculateBER	(	double	snir,
		Hz	bandwidth,
		bps	bitrate
	)		const

overridevirtual

Returns the bit error rate as a function of the signal to noise and interference ratio, the bandwidth, and the gross (physical) bitrate.

Implements inet::physicallayer::IModulation.

Reimplemented in inet::physicallayer::BpskModulation, and inet::physicallayer::QbpskModulation.

 {
     double EbN0 = snir * bandwidth.get() / bitrate.get();
     // http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation#Rectangular_QAM
     double ber = 4.0 / codeWordSize * (1 - 1 / sqrt(constellationSize)) * 0.5 * erfc(1 / sqrt(2) * sqrt(3.0 * codeWordSize / (constellationSize - 1) * EbN0));
     ASSERT(0.0 <= ber && ber <= 1.0);
     return ber;
 }

◆ calculateSER()

double inet::physicallayer::MqamModulationBase::calculateSER	(	double	snir,
		Hz	bandwidth,
		bps	bitrate
	)		const

overridevirtual

Returns the symbol error rate as a function of the signal to noise and interference ratio, the bandwidth, and the gross (physical) bitrate.

Implements inet::physicallayer::IModulation.

Reimplemented in inet::physicallayer::BpskModulation, and inet::physicallayer::QbpskModulation.

 {
     // http://en.wikipedia.org/wiki/Eb/N0
     double EbN0 = snir * bandwidth.get() / bitrate.get();
     double EsN0 = EbN0 * log2(constellationSize);
     // http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation#Rectangular_QAM
     double Psc = 2 * (1 - 1 / sqrt(constellationSize)) * 0.5 * erfc(1 / sqrt(2) * sqrt(3.0 / (constellationSize - 1) * EsN0));
     double ser = 1 - (1 - Psc) * (1 - Psc);
     ASSERT(0.0 <= ser && ser <= 1.0);
     return ser;
 }

◆ getNormalizationFactor()

virtual double inet::physicallayer::MqamModulationBase::getNormalizationFactor ( ) const

inlinevirtual

28 { return normalizationFactor; }

Member Data Documentation

◆ normalizationFactor

double inet::physicallayer::MqamModulationBase::normalizationFactor = NaN

protected

The documentation for this class was generated from the following files:

Public Member Functions

Protected Attributes

Additional Inherited Members