simthlib::FadingChannel Class Reference

#include <channel.h>

Inheritance diagram for simthlib::FadingChannel:

[legend]List of all members.

Public Types
enum	fix_type { FIXED, UNFIXED }
Public Member Functions
	FadingChannel (int id, simth::DeviceSystemIntf *s, const simth::PropertyList &pl, fix_type fix=UNFIXED)
virtual	~FadingChannel ()
	destructor
int	IsFixed () const
	returns 1 if the transfer factors are fixed
virtual void	refresh ()
	determines new random transfer factors
virtual void	getTransfer (int relative_time, simth::FreqSignal &trans) const
void	transmit (const simth::TimeSignal &sym, simth::TimeSignal *outsym)
	transmits a symbol sequence over the channel
virtual void	startOfSimulation ()
virtual void	print (std::ostream &os) const
Protected Attributes
fix_type	fixed
	flag for fixed or random channel
double	sigma
	scale factor sigma of rayleigh distribution
simth::RayleighRng *	ray
	pointer to a Rayleigh distributed random variable
simth::Array< simth::Complex >	transfer
	transfer function
Related Functions
(Note that these are not member functions.)
	propertylist_FadingChannel (not_a_function)

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Detailed Description

Channel with Rayleigh Fading in the amplitude, but zero phase rotation.

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Member Enumeration Documentation

enum simthlib::FadingChannel::fix_type

Flag for fixed or random channel. This is to be used for the Rayleigh fading channel only. Enumeration values: FIXED  for a channel with fixed transfer factors UNFIXED  for a channel with random transfer factors

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Constructor & Destructor Documentation

simthlib::FadingChannel::FadingChannel (  int  id, simth::DeviceSystemIntf *  s, const simth::PropertyList &  pl, fix_type  fix = UNFIXED )

Class constructor.

virtual simthlib::FadingChannel::~FadingChannel (   )  [virtual]

destructor

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Member Function Documentation

virtual void simthlib::FadingChannel::getTransfer (  int  relative_time, simth::FreqSignal &  trans )  const [virtual]

Returns the channel transfer factors. This could be used for an ideal channel estimation. The result is written into the given simth::FreqSignal trans. Parameters: relative_time  The relative time at which the transfer function is calculated, relative to the last time sample that was transmitted over this channel! trans  The simth::FreqSignal that receives the resulting transfer function. Implements simthlib::Channel.

int simthlib::FadingChannel::IsFixed (   )  const [inline]

returns 1 if the transfer factors are fixed

virtual void simthlib::FadingChannel::print (  std::ostream &  os  )  const [virtual]

Reimplemented from simthlib::Channel.

virtual void simthlib::FadingChannel::refresh (   )  [virtual]

determines new random transfer factors Reimplemented from simth::Device. Reimplemented in simthlib::CmplFadingChannel.

virtual void simthlib::FadingChannel::startOfSimulation (   )  [virtual]

Called by the simulation system at the beginning of each simulation run. Reimplemented from simthlib::Channel.

void simthlib::FadingChannel::transmit (  const simth::TimeSignal &  sym, simth::TimeSignal *  outsym )  [virtual]

transmits a symbol sequence over the channel Implements simthlib::Channel.

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Friends And Related Function Documentation

propertylist_FadingChannel (  not_a_function   )  [related]

These are the properties of class FadingChannel . This list is auto-generated from the XML-Devicelist of this device by means of an XSLT transformation script. Description of this device in the XML file: Channel with Rayleigh Fading in the amplitude, but zero phase rotation. Note that this class also has the Properties of its base classes. The direct base class is simthlib::Channel ; direct link to its propertylist should be propertylist_Channel(). The list below usually includes the properties that have been inherited from the base classes; the properties which belong only to this class can be found at the end of this list. input_length <sequencelength>, default "-1" -- The length of the input sequence. '-1' means it will be determined dynamically at runtime. snr <string>, default "" -- Name of the SNR loop variable in your simulation setup channel_refresh <string>, default "" -- Name of the channel refresh loop variable in your simulation setup 3 properties in this class. The above properties have been inherited from the base class simthlib::Channel . channel_type <string>, default "fading" -- The specific type of desired channel, i.e. the respective C++ class. sigma <double>, default "1.0" -- The scaling factor for the variation of the Rayleigh distribution of the transfer factors. This corresponds to the standard deviation (square root of variance) of the real and of the imaginary part, respectively. 2 properties in this class.

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Member Data Documentation

fix_type simthlib::FadingChannel::fixed [protected]

flag for fixed or random channel

simth::RayleighRng* simthlib::FadingChannel::ray [protected]

pointer to a Rayleigh distributed random variable

double simthlib::FadingChannel::sigma [protected]

scale factor sigma of rayleigh distribution

simth::Array<simth::Complex> simthlib::FadingChannel::transfer [protected]

transfer function

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