inet::physicallayer::Ieee80211OfdmDemodulator Class Reference

#include <Ieee80211OfdmDemodulator.h>

Inheritance diagram for inet::physicallayer::Ieee80211OfdmDemodulator:

Public Member Functions
	Ieee80211OfdmDemodulator (const Ieee80211OfdmModulation *subcarrierModulation)
const Ieee80211OfdmModulation *	getModulation () const
virtual const IReceptionBitModel *	demodulate (const IReceptionSymbolModel *symbolModel) const override
virtual std::ostream &	printToStream (std::ostream &stream, int level, int evFlags=0) const override
	Prints this object to the provided output stream. More...
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 Member Functions
BitVector	demodulateSymbol (const Ieee80211OfdmSymbol *signalSymbol) const
const IReceptionBitModel *	createBitModel (const BitVector *bitRepresentation, int signalFieldBitLength, bps signalFieldBitRate, int dataFieldBitLength, bps dataFieldBitRate) const
bool	isPilotOrDcSubcarrier (int i) const

Protected Attributes
const Ieee80211OfdmModulation *	subcarrierModulation = nullptr

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) }

Constructor & Destructor Documentation

Ieee80211OfdmDemodulator()

inet::physicallayer::Ieee80211OfdmDemodulator::Ieee80211OfdmDemodulator

(

const Ieee80211OfdmModulation *

subcarrierModulation

)

                                                                                                      :
    subcarrierModulation(subcarrierModulation)
{
}

Member Function Documentation

createBitModel()

const IReceptionBitModel * inet::physicallayer::Ieee80211OfdmDemodulator::createBitModel ( const BitVector *  bitRepresentation, int  signalFieldBitLength, bps  signalFieldBitRate, int  dataFieldBitLength, bps  dataFieldBitRate  ) const

protected

{
    return new ReceptionBitModel(b(signalFieldLength), signalFieldBitRate, b(dataFieldLength), dataFieldBitRate, bitRepresentation, NaN);
}

Referenced by demodulate().

demodulate()

const IReceptionBitModel * inet::physicallayer::Ieee80211OfdmDemodulator::demodulate ( const IReceptionSymbolModel *  symbolModel ) const

overridevirtual

Implements inet::physicallayer::IDemodulator.

{
    const std::vector<const ISymbol *> *symbols = symbolModel->getSymbols();
    BitVector *bitRepresentation = new BitVector();
    for (auto& symbols_i : *symbols) {
        const Ieee80211OfdmSymbol *symbol = dynamic_cast<const Ieee80211OfdmSymbol *>(symbols_i);
        BitVector bits = demodulateSymbol(symbol);
        for (unsigned int j = 0; j < bits.getSize(); j++)
            bitRepresentation->appendBit(bits.getBit(j));
    }
    return createBitModel(bitRepresentation, -1, bps(NaN), -1, bps(NaN)); // TODO
}

Referenced by inet::physicallayer::Ieee80211LayeredOfdmReceiver::createDataFieldBitModel(), inet::physicallayer::Ieee80211LayeredOfdmReceiver::createSignalFieldBitModel(), and inet::physicallayer::Ieee80211OfdmDemodulatorModule::demodulate().

demodulateSymbol()

BitVector inet::physicallayer::Ieee80211OfdmDemodulator::demodulateSymbol ( const Ieee80211OfdmSymbol *  signalSymbol ) const

protected

{
    std::vector<const ApskSymbol *> apskSymbols = signalSymbol->getSubCarrierSymbols();
    const ApskModulationBase *demodulationScheme = subcarrierModulation->getSubcarrierModulation();
    BitVector field;
    for (unsigned int i = 0; i < apskSymbols.size(); i++) {
        if (!isPilotOrDcSubcarrier(i)) {
            const ApskSymbol *apskSymbol = apskSymbols.at(i);
            ShortBitVector bits = demodulationScheme->demapToBitRepresentation(apskSymbol);
            for (unsigned int j = 0; j < bits.getSize(); j++)
                field.appendBit(bits.getBit(j));
        }
    }
    EV_DEBUG << "The field symbols has been demodulated into the following bit stream: " << field << endl;
    return field;
}

Referenced by demodulate().

getModulation()

const Ieee80211OfdmModulation* inet::physicallayer::Ieee80211OfdmDemodulator::getModulation ( ) const

inline

{ return subcarrierModulation; }

Referenced by inet::physicallayer::Ieee80211OfdmDemodulatorModule::getModulation(), and inet::physicallayer::Ieee80211OfdmDemodulatorModule::~Ieee80211OfdmDemodulatorModule().

isPilotOrDcSubcarrier()

bool inet::physicallayer::Ieee80211OfdmDemodulator::isPilotOrDcSubcarrier ( int  i ) const

protected

{
    return i == 5 || i == 19 || i == 33 || i == 47 || i == 26; // pilots are: 5,19,33,47, 26 (0+26) is a dc subcarrier
}

Referenced by demodulateSymbol().

printToStream()

std::ostream & inet::physicallayer::Ieee80211OfdmDemodulator::printToStream ( std::ostream &  stream, int  level, int  evFlags = 0  ) const

overridevirtual

Prints this object to the provided output stream.

Reimplemented from inet::IPrintableObject.

{
    stream << "Ieee80211OfdmDemodulator";
    if (level <= PRINT_LEVEL_TRACE)
        stream << EV_FIELD(subcarrierModulation, printFieldToString(subcarrierModulation, level + 1, evFlags));
    return stream;
}

Referenced by inet::physicallayer::Ieee80211OfdmDemodulatorModule::printToStream().

Member Data Documentation

subcarrierModulation

const Ieee80211OfdmModulation* inet::physicallayer::Ieee80211OfdmDemodulator::subcarrierModulation = nullptr

protected

Referenced by demodulateSymbol(), and printToStream().

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

• Ieee80211OfdmDemodulator.h
• Ieee80211OfdmDemodulator.cc