simthlib::TrellisSoftoutAlgorithm Class Reference

#include <trellissoftout.h>

Inheritance diagram for simthlib::TrellisSoftoutAlgorithm:

[legend]List of all members.

Public Member Functions
	TrellisSoftoutAlgorithm (std::auto_ptr< simthlib::Trellis > usedTrellis)
virtual	~TrellisSoftoutAlgorithm ()
virtual void	softout4Output (const simth::LlvSeq &metr, simth::LlrSeq *softout, const simth::LlrSeq *apri=NULL)=0
virtual void	softout4Input (const simth::LlvSeq &metr, simth::LlrSeq *softout, const simth::LlrSeq *apri=NULL)=0
virtual void	decode (const simth::LlvSeq &metr, simth::BitSeq *decodedData, const simth::LlrSeq *apri=NULL)=0
const simthlib::Trellis *	getTrellis ()
Protected Member Functions
simthlib::Trellis *	usedTrellis ()
size_t	pathLength () const
void	setPathLength (int newPathLength)

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Detailed Description

Abstract base class for all algorithms that provide trellis based regular soft-in-soft-out decoding.

'Regular' means that the algroithm takes as input an LLV sequence for the channel information and optional an LLR sequence for the a-priori information and that the algortihm takes an LLR sequence to store the soft-output information. Besides the soft-output algorithm, this class provides also normal 'hard output' decoding. The constructor takes as argument an pointer to a trellis.

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Constructor & Destructor Documentation

simthlib::TrellisSoftoutAlgorithm::TrellisSoftoutAlgorithm (  std::auto_ptr< simthlib::Trellis >  usedTrellis  )

Class constructor that takes an pointer to a Trellis used for decoding.

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

Class destructor.

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Member Function Documentation

virtual void simthlib::TrellisSoftoutAlgorithm::decode (  const simth::LlvSeq &  metr, simth::BitSeq *  decodedData, const simth::LlrSeq *  apri = NULL )  [pure virtual]

Decodes the given soft-information of the the coded bits. This could be useful for example to reduce computational complexity when in the last iteration of a turbo decoding procedure only the hard estimated bits are required. Implemented in simthlib::LogMapAlgorithmAbstract, and simthlib::Sova.

const simthlib::Trellis* simthlib::TrellisSoftoutAlgorithm::getTrellis (   )  [inline]

Returns a constant pointer to the trellis used by the algorithm.

size_t simthlib::TrellisSoftoutAlgorithm::pathLength (   )  const [inline, protected]

void simthlib::TrellisSoftoutAlgorithm::setPathLength (  int  newPathLength  )  [inline, protected]

virtual void simthlib::TrellisSoftoutAlgorithm::softout4Input (  const simth::LlvSeq &  metr, simth::LlrSeq *  softout, const simth::LlrSeq *  apri = NULL )  [pure virtual]

Computes soft-output information for the input of the decoding algorithm, i.e. the coded bits. Implemented in simthlib::LogMapAlgorithmAbstract, and simthlib::Sova.

virtual void simthlib::TrellisSoftoutAlgorithm::softout4Output (  const simth::LlvSeq &  metr, simth::LlrSeq *  softout, const simth::LlrSeq *  apri = NULL )  [pure virtual]

Computes soft-output information for the output of the decoding algorithm, i.e. the information bits. Implemented in simthlib::LogMapAlgorithmAbstract, and simthlib::Sova.

simthlib::Trellis* simthlib::TrellisSoftoutAlgorithm::usedTrellis (   )  [inline, protected]

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