itpp::BCH Class Reference
[Forward Error Correcting Codes]

Class for binary, narrow-sense BCH codes. More...

#include <bch.h>

List of all members.

Public Member Functions
	BCH (int in_n, int in_k, int in_t, const ivec &genpolynom, bool sys=false)
	Initialize a (n,k)-code that can correct t errors.
	BCH (int in_n, int in_t, bool sys=false)
	Initialize a (n,k)-code that can correct t errors.
virtual	~BCH ()
	Destructor.
virtual void	encode (const bvec &uncoded_bits, bvec &coded_bits)
	Encode a bvec of indata.
virtual bvec	encode (const bvec &uncoded_bits)
	Encode a bvec of indata.
virtual void	decode (const bvec &coded_bits, bvec &decoded_bits)
	Decode a bvec of coded data.
virtual bvec	decode (const bvec &coded_bits)
	Decode a bvec of coded data.
virtual void	decode (const vec &received_signal, bvec &output)
	Decode a vec of received data.
virtual bvec	decode (const vec &received_signal)
	Decode a vec of received data.
virtual double	get_rate () const
	Get the code rate.
virtual int	get_k () const
	Get cardinality of code k.
BCH &	operator= (const BCH &)
	Dummy assignment operator - MSVC++ warning C4512.

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Detailed Description

Class for binary, narrow-sense BCH codes.

The notation used is found in S. B. Wicker, "Error control systems for digital communication and storage", Appendix E, Prentice-Hall, 1995.

Example:

 BCH bch(31,21,2,ivec("3 5 5 1"))

uses the generator polynomial , and is capable of correcting 2 errors with n = 31 and k = 21.

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Constructor & Destructor Documentation

itpp::BCH::BCH	(	int	in_n,
		int	in_k,
		int	in_t,
		const ivec &	genpolynom,
		bool	sys = false
	)

Initialize a (n,k)-code that can correct t errors.

Note:

Do not call this constructor with e.g. BCH bch(31, 21, 2, "3 5 5 1") but with BCH bch(31, 21, 2, ivec("3 5 5 1")) instead. Otherwise the complier will complain.

References itpp::oct2bin(), itpp::GFX::set(), and itpp::zeros_i().

itpp::BCH::BCH	(	int	in_n,
		int	in_t,
		bool	sys = false
	)

Initialize a (n,k)-code that can correct t errors.

Author:

Stephan Ludwig

The generator polynomial is automatically generated from the (n, t) parameters of the BCH code. The constructor generates the generator polynomial (and determines k) according to the method described in:

[Wic95] S. B. Wicker, "Error control systems for digital communication and storage", Prentice-Hall, 1995

References itpp::GFX::get_true_degree(), itpp::int2bits(), it_assert, itpp::Array< T >::length(), itpp::length(), itpp::GFX::set(), itpp::Array< T >::set_size(), and itpp::zeros_i().

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The documentation for this class was generated from the following files:

• bch.h
• bch.cpp