Class holds common methods and attributes for different decoder implementations. More...

#include <gnuradio/fec/polar_decoder_common.h>

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

	~polar_decoder_common ()

double	rate ()

int	get_input_size ()

int	get_output_size ()

bool	set_frame_size (unsigned int frame_size)

Public Member Functions inherited from gr::fec::generic_decoder
virtual void	generic_work (void inbuffer, void outbuffer)=0

int	unique_id ()

std::string	alias ()

	generic_decoder (void)

	generic_decoder (std::string name)

virtual	~generic_decoder ()

virtual int	get_history ()

virtual float	get_shift ()

virtual int	get_input_item_size ()

virtual int	get_output_item_size ()

virtual const char *	get_input_conversion ()

virtual const char *	get_output_conversion ()

virtual float	get_iterations ()

Public Member Functions inherited from 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)

	~polar_common ()

Protected Member Functions
float	llr_odd (const float la, const float lb) const

float	llr_even (const float la, const float lb, const unsigned char f) const

unsigned char	llr_bit_decision (const float llr) const

const bool	is_frozen_bit (const int u_num) const

const unsigned char	next_frozen_bit ()

void	initialize_decoder (unsigned char u, float llrs, const float *input)

void	butterfly (float llrs, unsigned char u, const int stage, const int u_num, const int row)

void	butterfly_volk (float llrs, unsigned char u, const int stage, const int u_num, const int row)

void	butterfly_generic (float llrs, unsigned char u, const int stage, const int u_num, const int row)

void	even_u_values (unsigned char u_even, const unsigned char u, const int u_num)

void	odd_xor_even_values (unsigned char u_xor, const unsigned char u, const int u_num)

void	extract_info_bits (unsigned char output, const unsigned char input) const

void	print_pretty_llr_vector (const float *llr_vec) const

Protected Member Functions inherited from gr::fec::code::polar_common
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)

Additional Inherited Members
Public Types inherited from gr::fec::generic_decoder
typedef boost::shared_ptr < generic_decoder >	sptr

Public Attributes inherited from gr::fec::generic_decoder
int	my_id

std::string	d_name

Static Public Attributes inherited from gr::fec::generic_decoder
static int	base_unique_id

Protected Attributes inherited from gr::fec::generic_decoder
gr::logger_ptr	d_logger

Protected Attributes inherited from gr::fec::code::polar_common
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

Class holds common methods and attributes for different decoder implementations.

Constructor & Destructor Documentation

gr::fec::code::polar_decoder_common::polar_decoder_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_decoder_common::~polar_decoder_common ( )

Member Function Documentation

void gr::fec::code::polar_decoder_common::butterfly	(	float *	llrs,
		unsigned char *	u,
		const int	stage,
		const int	u_num,
		const int	row
	)

protected

void gr::fec::code::polar_decoder_common::butterfly_generic	(	float *	llrs,
		unsigned char *	u,
		const int	stage,
		const int	u_num,
		const int	row
	)

protected

void gr::fec::code::polar_decoder_common::butterfly_volk	(	float *	llrs,
		unsigned char *	u,
		const int	stage,
		const int	u_num,
		const int	row
	)

protected

void gr::fec::code::polar_decoder_common::even_u_values	(	unsigned char *	u_even,
		const unsigned char *	u,
		const int	u_num
	)

protected

void gr::fec::code::polar_decoder_common::extract_info_bits	(	unsigned char *	output,
		const unsigned char *	input
	)		const

protected

int gr::fec::code::polar_decoder_common::get_input_size ( )

inlinevirtual

Returns the input size in items that the decoder object uses to decode a full frame. Often, this number is the number of bits per frame if the input format is unpacked. If the block expects packed bytes, then this value should be the number of bytes (number of bits / 8) per input frame.

The child class MUST implement this function.

Implements gr::fec::generic_decoder.

int gr::fec::code::polar_decoder_common::get_output_size ( )

inlinevirtual

Returns the output size in items that the decoder object produces after decoding a full frame. Often, this number is the number of bits in the outputted frame if the input format is unpacked. If the block produces packed bytes, then this value should be the number of bytes (number of bits / 8) per frame produced. This value is generally something like get_input_size()/R for a 1/R rate code.

The child class MUST implement this function.

Implements gr::fec::generic_decoder.

void gr::fec::code::polar_decoder_common::initialize_decoder	(	unsigned char *	u,
		float *	llrs,
		const float *	input
	)

protected

const bool gr::fec::code::polar_decoder_common::is_frozen_bit ( const int u_num ) const

protected

unsigned char gr::fec::code::polar_decoder_common::llr_bit_decision ( const float llr ) const

inlineprotected

float gr::fec::code::polar_decoder_common::llr_even	(	const float	la,
		const float	lb,
		const unsigned char	f
	)		const

protected

float gr::fec::code::polar_decoder_common::llr_odd	(	const float	la,
		const float	lb
	)		const

protected

const unsigned char gr::fec::code::polar_decoder_common::next_frozen_bit ( )

protected

void gr::fec::code::polar_decoder_common::odd_xor_even_values	(	unsigned char *	u_xor,
		const unsigned char *	u,
		const int	u_num
	)

protected

void gr::fec::code::polar_decoder_common::print_pretty_llr_vector ( const float * llr_vec ) const

protected

double gr::fec::code::polar_decoder_common::rate ( )

inlinevirtual

Returns the rate of the code. For every r input bits, there is 1 output bit, so the rate is 1/r. Used for setting things like the encoder block's relative rate.

This function MUST be reimplemented by the child class.

Implements gr::fec::generic_decoder.

bool gr::fec::code::polar_decoder_common::set_frame_size ( unsigned int frame_size )

inlinevirtual

Updates the size of a decoded frame.

The child class MUST implement this function and interpret how the frame_size information affects the block's behavior. It should also provide bounds checks.

Implements gr::fec::generic_decoder.

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

polar_decoder_common.h

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation