path_loss.hpp

来自「RFID reader 语 tag 模拟器」· HPP 代码 · 共 119 行

 #ifndef PATH_LOSS_H
 #define PATH_LOSS_H

 #include <math.h>
 #include <boost/shared_ptr.hpp>
 #include <boost/utility.hpp>

 class WirelessCommSignal;
 class PhysicalLayer;

 class PathLoss : boost::noncopyable {
 public:
    typedef boost::shared_ptr<PathLoss> PathLossPtr;

    virtual ~PathLoss();

    virtual double getRecvdStrength(const WirelessCommSignal& signal,
       const PhysicalLayer& receiver) const = 0;

 protected:

    static const bool m_DEBUG_SIGNAL_STRENGTH = false;

    PathLoss();

 private:

 };
 typedef boost::shared_ptr<PathLoss> PathLossPtr;

 class FreeSpace : public PathLoss {
 public:
    typedef boost::shared_ptr<FreeSpace> FreeSpacePtr;

    static inline FreeSpacePtr create();

    static inline FreeSpacePtr create(double lossFactor);

    virtual double getRecvdStrength(const WirelessCommSignal& signal,
       const PhysicalLayer& receiver) const;

 protected:

    FreeSpace();

    FreeSpace(double lossFactor);

 protected:

    static const double m_DEFAULT_LOSS_FACTOR;

    double m_lossFactor;

 private:

 };
 typedef boost::shared_ptr<FreeSpace> FreeSpacePtr;

 class TwoRay : public FreeSpace {
 public:
    typedef boost::shared_ptr<TwoRay> TwoRayPtr;

    static inline TwoRayPtr create();

    static inline TwoRayPtr create(double lossFactor);

    virtual double getRecvdStrength(const WirelessCommSignal& signal,
       const PhysicalLayer& receiver) const;

 protected:

    TwoRay();

    TwoRay(double lossFactor);


 private:

    static const double m_DEFAULT_ANTENNA_HEIGHT;

    double m_antennaHeight;

 };
 typedef boost::shared_ptr<TwoRay> TwoRayPtr;

 // Inline Functions

 inline FreeSpacePtr FreeSpace::create()
 {
    FreeSpacePtr p(new FreeSpace());
    return p;
 }

 inline FreeSpacePtr FreeSpace::create(double lossFactor)
 {
    FreeSpacePtr p(new FreeSpace(lossFactor));
    return p;
 }

 inline TwoRayPtr TwoRay::create()
 {
    TwoRayPtr p(new TwoRay());
    return p;
 }

 inline TwoRayPtr TwoRay::create(double lossFactor)
 {
    TwoRayPtr p(new TwoRay(lossFactor));
    return p;
 }

 // Overloaded Operators

 #endif // PATH_LOSS_H