#include <DsssOqpsk16Modulation.h>

Inheritance diagram for inet::physicallayer::DsssOqpsk16Modulation:

Public Member Functions
	DsssOqpsk16Modulation ()

virtual	~DsssOqpsk16Modulation ()

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...

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...

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

Static Public Attributes
static const DsssOqpsk16Modulation	singleton

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)

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

const unsigned int	codeWordSize

const unsigned int	constellationSize

Constructor & Destructor Documentation

◆ DsssOqpsk16Modulation()

inet::physicallayer::DsssOqpsk16Modulation::DsssOqpsk16Modulation ( )

                                              :
     // TODO fill in the correct real and imaginary parts
     ApskModulationBase(new std::vector<ApskSymbol>({ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN),
                                                     ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN),
                                                     ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN),
                                                     ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN), ApskSymbol(NaN, NaN)}))
 {
 }

◆ ~DsssOqpsk16Modulation()

inet::physicallayer::DsssOqpsk16Modulation::~DsssOqpsk16Modulation ( )

virtual

                                               {
     delete constellation;
 }

Member Function Documentation

◆ calculateBER()

double inet::physicallayer::DsssOqpsk16Modulation::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.

 {
     // Taken from MiXiM 802.15.4 decider by Karl Wessel
     // Valid for IEEE 802.15.4 2.45 GHz OQPSK modulation
     // Following formula is defined in IEEE 802.15.4 standard, please check the
     // 2006 standard, page 268, section E.4.1.8 Bit error rate (BER)
     // calculations, formula 7). Here you can see that the factor of 20.0 is correct ;).
  
     // without these, the calculation does not make sense
     ASSERT(bandwidth >= MHz(2));
     ASSERT(bitrate == kbps(250));
  
     const double dSNRFct = 20.0 * snir;
     double dSumK = 0;
     int k = 2;
  
     /* following loop was optimized by using n_choose_k symmetries
        for (k=2; k <= 16; ++k) {
         dSumK += pow(-1.0, k) * n_choose_k(16, k) * exp(dSNRFct * (1.0 / k - 1.0));
        }
      */
  
     // n_choose_k(16, k) == n_choose_k(16, 16-k)
     for (; k < 8; k += 2) {
         // k will be 2, 4, 6 (symmetric values: 14, 12, 10)
         dSumK += math::n_choose_k(16, k) * (exp(dSNRFct * (1.0 / k - 1.0)) + exp(dSNRFct * (1.0 / (16 - k) - 1.0)));
     }
  
     // for k =  8 (which does not have a symmetric value)
     k = 8;
     dSumK += math::n_choose_k(16, k) * exp(dSNRFct * (1.0 / k - 1.0));
     for (k = 3; k < 8; k += 2) {
         // k will be 3, 5, 7 (symmetric values: 13, 11, 9)
         dSumK -= math::n_choose_k(16, k) * (exp(dSNRFct * (1.0 / k - 1.0)) + exp(dSNRFct * (1.0 / (16 - k) - 1.0)));
     }
  
     // for k = 15 (because of missing k=1 value)
     k = 15;
     dSumK -= math::n_choose_k(16, k) * exp(dSNRFct * (1.0 / k - 1.0));
  
     // for k = 16 (because of missing k=0 value)
     k = 16;
     dSumK += math::n_choose_k(16, k) * exp(dSNRFct * (1.0 / k - 1.0));
     double ber = (8.0 / 15) * (1.0 / 16) * dSumK;
     ASSERT(0.0 <= ber && ber <= 1.0);
     return ber;
 }

◆ calculateSER()

double inet::physicallayer::DsssOqpsk16Modulation::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.

 {
     return NAN;
 }

Member Data Documentation

◆ singleton

const DsssOqpsk16Modulation inet::physicallayer::DsssOqpsk16Modulation::singleton

static

Referenced by inet::physicallayer::ApskModulationBase::findModulation().

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

Public Member Functions

Static Public Attributes

Additional Inherited Members