gr::fec::code Namespace Reference

Namespaces
	polar

Classes
class	cc_decoder
	Convolutional Code Decoding class. More...
class	cc_encoder
	Convolutional Code Encoding class. More...
class	ccsds_encoder
	CCSDS Encoding class for convolutional encoding with rate 1/2, K=7, and polynomials [109, 79]. More...
class	dummy_decoder
	Dummy Decoding class. More...
class	dummy_encoder
	Dummy Encoding class. More...
struct	block_data
struct	matrix
class	fec_mtrx
	Base class for FEC matrix objects. More...
class	ldpc_bit_flip_decoder
	LDPC bit flip decoding class. More...
class	ldpc_G_matrix
	Class for storing H or G matrix. More...
class	ldpc_gen_mtrx_encoder
	LDPC generator matrix encoder. More...
class	ldpc_H_matrix
	Parity check matrix in Richardson/Urbanke format. More...
class	ldpc_par_mtrx_encoder
class	polar_common
	POLAR code common operations and attributes. More...
class	polar_decoder_common
	Class holds common methods and attributes for different decoder implementations. More...
class	polar_decoder_sc
	Standard successive cancellation (SC) decoder for POLAR codes. More...
class	polar_decoder_sc_list
	Successive cancellation list (SCL) decoder for polar codes. More...
class	polar_decoder_sc_systematic
	Standard systematic successive cancellation (SC) decoder for POLAR codes. More...
class	polar_encoder
	POLAR encoder for basic details see 'polar_common' class. More...
class	polar_encoder_systematic
	systematic POLAR encoder for basic details see 'polar_common' class. More...
class	repetition_decoder
	Repetition Decoding class. More...
class	repetition_encoder
	Repetition Encoding class. More...

Typedefs
typedef void(*	conv_kernel) (unsigned char *Y, unsigned char *X, unsigned char *syms, unsigned char *dec, unsigned int framebits, unsigned int excess, unsigned char *Branchtab)

Functions
FEC_API void	matrix_free (matrix *x)
FEC_API matrix_sptr	read_matrix_from_file (const std::string filename)
	Read in an alist file and produce the matrix object. More...
FEC_API void	write_matrix_to_file (const std::string filename, matrix_sptr M)
FEC_API matrix_sptr	generate_G_transpose (matrix_sptr H_obj)
	Takes a parity check matrix (H) and returns the transpose of the generator matrix (G). More...
FEC_API matrix_sptr	generate_G (matrix_sptr H_obj)
	Takes a parity check matrix (H) and returns the generator matrix (G). More...
FEC_API matrix_sptr	generate_H (matrix_sptr G_obj)
	Takes a generator matrix (G) and returns the parity check matrix (H). More...
FEC_API void	print_matrix (const matrix_sptr M, bool numpy=false)
	Takes a matrix and prints it to screen. More...

Typedef Documentation

conv_kernel

typedef void(* gr::fec::code::conv_kernel) (unsigned char *Y, unsigned char *X, unsigned char *syms, unsigned char *dec, unsigned int framebits, unsigned int excess, unsigned char *Branchtab)

Function Documentation

generate_G()

FEC_API matrix_sptr gr::fec::code::generate_G

(

matrix_sptr

H_obj

)

Takes a parity check matrix (H) and returns the generator matrix (G).

The result is returned as a matrix shared pointer. The form of this matrix is [I_k | P], where P is the parity check matrix. It is a k x n matrix where k is the information length and n is the codeword length.

Parameters

H_obj

A parity check matrix; generally derived from using read_matrix_from_file with a given alist file format.

generate_G_transpose()

FEC_API matrix_sptr gr::fec::code::generate_G_transpose

(

matrix_sptr

H_obj

)

Takes a parity check matrix (H) and returns the transpose of the generator matrix (G).

The result is returned as a matrix shared pointer. The form of this matrix is [I_k | P]^T, where P is the parity check matrix. It is a n x k matrix where k is the information length and n is the codeword length.

Parameters

H_obj

A parity check matrix; generally derived from using read_matrix_from_file with a given alist file format.

generate_H()

FEC_API matrix_sptr gr::fec::code::generate_H

(

matrix_sptr

G_obj

)

Takes a generator matrix (G) and returns the parity check matrix (H).

Parameters

G_obj

A parity check matrix; generally derived from using read_matrix_from_file with a given alist file format.

matrix_free()

FEC_API void gr::fec::code::matrix_free

(

matrix *

x

)

print_matrix()

FEC_API void gr::fec::code::print_matrix	(	const matrix_sptr	M,
		bool	numpy = false
	)

Takes a matrix and prints it to screen.

Parameters

M	a matrix_sptr; generally a G or H matrix for LDPC codes.
numpy	will output in a format that can be copy-and-pasted directly into a numpy.matrix(~) call in Python.

read_matrix_from_file()

FEC_API matrix_sptr gr::fec::code::read_matrix_from_file

(

const std::string

filename

)

Read in an alist file and produce the matrix object.

Takes in a an alist file (the file name as a string) and creates the corresponding matrix. The format of alist files is described at: http://www.inference.phy.cam.ac.uk/mackay/codes/alist.html

The result is returned as a matrix shared pointer.

Parameters

filename

Name of an alist file to use. The alist format is described at: http://www.inference.phy.cam.ac.uk/mackay/codes/alist.html

write_matrix_to_file()

FEC_API void gr::fec::code::write_matrix_to_file	(	const std::string	filename,
		matrix_sptr	M
	)