simthlib::Decoder Class Reference

Abstract base class for decoders with 'soft' decoding.. More...

#include <decoder.h>

Inheritance diagram for simthlib::Decoder:

[legend]List of all members.

Public Member Functions
	Decoder (int deviceID, simth::DeviceSystemIntf *system, const simth::PropertyList &pl, simth::SequenceType inType)
virtual	~Decoder ()
virtual void	decode (const simth::BitSeq &bsin, simth::BitSeq &bsout)=0
virtual void	decode (const simth::LlvSeq &llv, simth::BitSeq &bsout)=0
virtual void	decode (const simth::LlrSeq &llr, simth::BitSeq &bsout)=0
virtual int	getDataLength (int codedLength) const =0
virtual int	getCodeLength (int rawLength) const =0
virtual void	process ()
virtual void	print (std::ostream &os) const
void	startOfSimulation ()
Static Public Member Functions
static void	init (const std::string &fileName, simth::Device **dev, simth::DeviceSystemIntf *sysPtr, int ID, const std::string &regionQualifier="")
Protected Member Functions
simth::SequenceType	inputType () const
Related Functions
(Note that these are not member functions.)
	propertylist_Decoder (not_a_function)

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Detailed Description

Abstract base class for decoders with 'soft' decoding..

Abstract base class which provides an interface for particularly derived decoder classes.

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Constructor & Destructor Documentation

simthlib::Decoder::Decoder (  int  deviceID, simth::DeviceSystemIntf *  system, const simth::PropertyList &  pl, simth::SequenceType  inType )

virtual simthlib::Decoder::~Decoder (   )  [inline, virtual]

Virtual Destructor.

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Member Function Documentation

virtual void simthlib::Decoder::decode (  const simth::LlrSeq &  llr, simth::BitSeq &  bsout )  [pure virtual]

Performs a maximum likelihood sequence estimation based on the log-likelihood ratios given by the demodulator (the received modulation symbols) (soft decision decoding). Implemented in simthlib::ReedSolomonDecoder, simthlib::TrellisDecoder, and simthlib::PunctConvDecoder.

virtual void simthlib::Decoder::decode (  const simth::LlvSeq &  llv, simth::BitSeq &  bsout )  [pure virtual]

Performs a maximum likelihood sequence estimation of the data sequence based on the log-likelihood values of the given (the received) modulation symbols (soft decision decoding) Implemented in simthlib::ReedSolomonDecoder, simthlib::TrellisDecoder, and simthlib::PunctConvDecoder.

virtual void simthlib::Decoder::decode (  const simth::BitSeq &  bsin, simth::BitSeq &  bsout )  [pure virtual]

Decodes a bit sequence (hard decision decoding). Implemented in simthlib::ReedSolomonDecoder, simthlib::TrellisDecoder, and simthlib::PunctConvDecoder.

virtual int simthlib::Decoder::getCodeLength (  int  rawLength  )  const [pure virtual]

Returns the length of a coded bit sequence which is generated by the coder from a raw data sequence of the given length. Parameters: rawLength  length of the data sequence Returns: allocated length of the coded sequence Implemented in simthlib::ReedSolomonDecoder, simthlib::TrellisDecoder, and simthlib::PunctConvDecoder.

virtual int simthlib::Decoder::getDataLength (  int  codedLength  )  const [pure virtual]

Returns the length of a data bit sequence which is encoded by the coder from a coded bit sequence of the given length Parameters: codedLength  length of the coded sequence Returns: allocated length of the encoded data sequence Implemented in simthlib::ReedSolomonDecoder, simthlib::TrellisDecoder, and simthlib::PunctConvDecoder.

static void simthlib::Decoder::init (  const std::string &  fileName, simth::Device **  dev, simth::DeviceSystemIntf *  sysPtr, int  ID, const std::string &  regionQualifier = "" )  [static]

simth::SequenceType simthlib::Decoder::inputType (   )  const [inline, protected]

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

Reimplemented from simth::Device. Reimplemented in simthlib::TrellisDecoder.

virtual void simthlib::Decoder::process (   )  [virtual]

This standard implementation of process calls decode with the appropriate input types (simth::LlrSeq or simth::LlvSeq) Implements simth::Device. Reimplemented in simthlib::StreamDecoder.

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

To set up the output length. Watch out: Any derived class *must* call this function!!!!! Reimplemented from simth::Device.

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Friends And Related Function Documentation

propertylist_Decoder (  not_a_function   )  [related]

These are the properties of class Decoder . 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: Base class for the usual encoder block in a simulation system. Note that this class also has the Properties of its base classes. The direct base class is simth::Device ; direct link to its propertylist should be propertylist_Device(). 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. output_length <sequencelength>, default "" -- 1 properties in this class.

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