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

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

#include <itpp/comm/bch.h>

Inheritance diagram for itpp::BCH:

itpp::Channel_Code List of all members.

Public Member Functions

 BCH (int in_n, int in_k, int in_t, ivec genpolynom)
 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 ()
 Get the code rate.

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,"3 5 5 1")
uses the generator polynomial $g(x) = x^{10} + x^9 + x^8 + x^6 + x^5 + x^3 + 1$, and is capable of correcting 2 errors with n = 31 and k = 21.

Definition at line 62 of file bch.h.

Constructor & Destructor Documentation

itpp::BCH::BCH (  int  in_n,
int  in_k,
int  in_t,
ivec  genpolynom
) 
 

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

Definition at line 41 of file bch.cpp.

References itpp::Vec< Num_T >::length(), itpp::oct2bin(), and itpp::GFX::set().

virtual itpp::BCH::~BCH (   )  [inline, virtual]
 

Destructor.

Definition at line 68 of file bch.h.

Member Function Documentation

void itpp::BCH::encode (  const bvec &  uncoded_bits,
bvec &  coded_bits
)  [virtual]
 

Encode a bvec of indata.

Implements itpp::Channel_Code.

Definition at line 56 of file bch.cpp.

References itpp::floor(), itpp::Vec< Num_T >::length(), itpp::Vec< Num_T >::mid(), itpp::Vec< Num_T >::replace_mid(), and itpp::Vec< Num_T >::set_size().

Referenced by encode().

bvec itpp::BCH::encode (  const bvec &  uncoded_bits  )  [virtual]
 

Encode a bvec of indata.

Implements itpp::Channel_Code.

Definition at line 84 of file bch.cpp.

References encode().

void itpp::BCH::decode (  const bvec &  coded_bits,
bvec &  decoded_bits
)  [virtual]
 

Decode a bvec of coded data.

Implements itpp::Channel_Code.

Definition at line 91 of file bch.cpp.

References itpp::Vec< Num_T >::clear(), itpp::floor(), itpp::Vec< Num_T >::length(), itpp::Vec< Num_T >::mid(), itpp::Vec< Num_T >::replace_mid(), itpp::Vec< Num_T >::set_size(), and itpp::zeros_b().

Referenced by decode().

bvec itpp::BCH::decode (  const bvec &  coded_bits  )  [virtual]
 

Decode a bvec of coded data.

Implements itpp::Channel_Code.

Definition at line 189 of file bch.cpp.

References decode().

void itpp::BCH::decode (  const vec &  received_signal,
bvec &  output
)  [virtual]
 

Decode a vec of received data.

Implements itpp::Channel_Code.

Definition at line 198 of file bch.cpp.

References it_error.

bvec itpp::BCH::decode (  const vec &  received_signal  )  [virtual]
 

Decode a vec of received data.

Implements itpp::Channel_Code.

Definition at line 203 of file bch.cpp.

References it_error.

virtual double itpp::BCH::get_rate (  void   )  [inline, virtual]
 

Get the code rate.

Implements itpp::Channel_Code.

Definition at line 85 of file bch.h.

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