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JakesFadingGenerator.hpp

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#ifndef JAKES_FADING_GENERATOR
#define JAKES_FADING_GENERATOR

#include <WNS/PowerRatio.hpp>

#include <vector>
#include <complex>


namespace rise { namespace scenario { namespace ftfading {

    class JakesFadingGenerator
    {
    public:
        // empty constructor needed for std::vector<JakesFadingGenerator>
        JakesFadingGenerator();
        ~JakesFadingGenerator();

        void initJakes(const double _maximumDopplerFrequency, const double _samplingTime, const unsigned int _numberOfWaves);

        std::complex<double>     getNextComplexFadingValue();
        wns::Ratio               getNextFadingRatio();
        double                   getNextFadingValue();

    private:
        unsigned int        currentSampleIndex;
        //double              maximumDopplerFrequency;      // maximum Doppler shift
        double              samplingTime;
        //double              samplingFrequency_;      // sampling frequency
        //unsigned int        numberOfWaves;
        unsigned int        numberOfWavesQuarter; // No_ in formulas

        //double              scaleFactor; // std::sqrt(2.0/(static_cast<double>(numberOfWavesQuarter)))
        //UniDis randomAngle; // between 0..2pi

        std::vector< std::complex<double> > complexTurningFactorVector;
        std::vector<double>                omega;
        //std::vector<double>                theta;
        double              thetaInitial;
    };

}}}

#endif

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