gr::fec::code::polar_common Class Reference

POLAR code common operations and attributes. More...

#include <gnuradio/fec/polar_common.h>

Public Member Functions
	polar_common (int block_size, int num_info_bits, std::vector< int > frozen_bit_positions, std::vector< char > frozen_bit_values)
	~polar_common ()

Protected Member Functions
const int	block_size () const
const int	block_power () const
const int	num_info_bits () const
long	bit_reverse (long value, int active_bits) const
void	print_packed_bit_array (const unsigned char *printed_array, const int num_bytes) const
void	print_unpacked_bit_array (const unsigned char *bits, const unsigned int num_bytes) const
void	setup_info_bit_positions_reversed ()
void	setup_volk_vectors ()
void	volk_encode (unsigned char *out_buf, const unsigned char *in_buf)
void	volk_encode_block (unsigned char *out_buf, unsigned char *in_buf)

Protected Attributes
std::vector< int >	d_frozen_bit_positions
std::vector< char >	d_frozen_bit_values
std::vector< int >	d_info_bit_positions
std::vector< int >	d_info_bit_positions_reversed
unsigned char *	d_volk_temp
unsigned char *	d_volk_frozen_bit_mask
unsigned char *	d_volk_frozen_bits

Detailed Description

POLAR code common operations and attributes.

Polar codes are based on this paper by Erdal Arikan "Channel Polarization: A Method for Contructing Capacity-Achieving Codes for Symmetric Binary-Input Memoryless Channels", 2009 block holds common information for encoders and decoders. All polar encoder/decoders inherit from polar_common.

class holds common info. It is common to all encoders and decoders.

Constructor & Destructor Documentation

gr::fec::code::polar_common::polar_common	(	int	block_size,
		int	num_info_bits,
		std::vector< int >	frozen_bit_positions,
		std::vector< char >	frozen_bit_values
	)

Parameters

block_size	codeword size. MUST be a power of 2.
num_info_bits	represents the number of information bits in a block. Also called frame_size. <= block_size
frozen_bit_positions	is an integer vector which defines the position of all frozen bits in a block. Its size MUST be equal to block_size - num_info_bits. Also it must be sorted and every position must only occur once.
frozen_bit_values	holds an unpacked byte for every frozen bit position. It defines if a frozen bit is fixed to '0' or '1'. Defaults to all ZERO.

gr::fec::code::polar_common::~polar_common

(

)

Member Function Documentation

long gr::fec::code::polar_common::bit_reverse ( long  value, int  active_bits  ) const

protected

const int gr::fec::code::polar_common::block_power ( ) const

inlineprotected

const int gr::fec::code::polar_common::block_size ( ) const

inlineprotected

const int gr::fec::code::polar_common::num_info_bits ( ) const

inlineprotected

void gr::fec::code::polar_common::print_packed_bit_array ( const unsigned char *  printed_array, const int  num_bytes  ) const

protected

void gr::fec::code::polar_common::print_unpacked_bit_array ( const unsigned char *  bits, const unsigned int  num_bytes  ) const

protected

void gr::fec::code::polar_common::setup_info_bit_positions_reversed ( )

protected

void gr::fec::code::polar_common::setup_volk_vectors ( )

protected

void gr::fec::code::polar_common::volk_encode ( unsigned char *  out_buf, const unsigned char *  in_buf  )

protected

void gr::fec::code::polar_common::volk_encode_block ( unsigned char *  out_buf, unsigned char *  in_buf  )

protected

Member Data Documentation

std::vector<int> gr::fec::code::polar_common::d_frozen_bit_positions

protected

std::vector<char> gr::fec::code::polar_common::d_frozen_bit_values

protected

std::vector<int> gr::fec::code::polar_common::d_info_bit_positions

protected

std::vector<int> gr::fec::code::polar_common::d_info_bit_positions_reversed

protected

unsigned char* gr::fec::code::polar_common::d_volk_frozen_bit_mask

protected

unsigned char* gr::fec::code::polar_common::d_volk_frozen_bits

protected

unsigned char* gr::fec::code::polar_common::d_volk_temp

protected

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

• polar_common.h