gr::digital::constellation_psk Class Reference

constellation_pskConstellation space is divided into pie slices sectors. More...

#include <gnuradio/digital/constellation.h>

Public Types
typedef boost::shared_ptr< constellation_psk >	sptr

Public Member Functions
	~constellation_psk ()
Public Member Functions inherited from gr::digital::constellation_sector
	constellation_sector (std::vector< gr_complex > constell, std::vector< int > pre_diff_code, unsigned int rotational_symmetry, unsigned int dimensionality, unsigned int n_sectors)
	~constellation_sector ()
unsigned int	decision_maker (const gr_complex *sample)
	Returns the constellation point that matches best. More...
Public Member Functions inherited from gr::digital::constellation
	constellation (std::vector< gr_complex > constell, std::vector< int > pre_diff_code, unsigned int rotational_symmetry, unsigned int dimensionality, bool normalize_points=true)
	constellation ()
virtual	~constellation ()
void	map_to_points (unsigned int value, gr_complex *points)
	Returns the constellation points for a symbol value. More...
std::vector< gr_complex >	map_to_points_v (unsigned int value)
unsigned int	decision_maker_v (std::vector< gr_complex > sample)
	Takes a vector rather than a pointer. Better for SWIG wrapping. More...
unsigned int	decision_maker_pe (const gr_complex *sample, float *phase_error)
	Also calculates the phase error. More...
virtual void	calc_metric (const gr_complex *sample, float *metric, gr::digital::trellis_metric_type_t type)
	Calculates distance. More...
virtual void	calc_euclidean_metric (const gr_complex *sample, float *metric)
virtual void	calc_hard_symbol_metric (const gr_complex *sample, float *metric)
std::vector< gr_complex >	points ()
	Returns the set of points in this constellation. More...
std::vector< gr_complex >	s_points ()
	Returns the vector of points in this constellation. Raise error if dimensionality is not one. More...
std::vector< std::vector< gr_complex > >	v_points ()
	Returns a vector of vectors of points. More...
bool	apply_pre_diff_code ()
	Whether to apply an encoding before doing differential encoding. (e.g. gray coding) More...
void	set_pre_diff_code (bool a)
	Whether to apply an encoding before doing differential encoding. (e.g. gray coding) More...
std::vector< int >	pre_diff_code ()
	Returns the encoding to apply before differential encoding. More...
unsigned int	rotational_symmetry ()
	Returns the order of rotational symmetry. More...
unsigned int	dimensionality ()
	Returns the number of complex numbers in a single symbol. More...
unsigned int	bits_per_symbol ()
unsigned int	arity ()
constellation_sptr	base ()
pmt::pmt_t	as_pmt ()
void	gen_soft_dec_lut (int precision, float npwr=1.0)
	Generates the soft decision LUT based on constellation and symbol map. More...
virtual std::vector< float >	calc_soft_dec (gr_complex sample, float npwr=1.0)
	Calculate soft decisions for the given sample. More...
void	set_soft_dec_lut (const std::vector< std::vector< float >> &soft_dec_lut, int precision)
	Define a soft decision look-up table. More...
bool	has_soft_dec_lut ()
	Returns True if the soft decision LUT has been defined, False otherwise. More...
std::vector< std::vector< float > >	soft_dec_lut ()
std::vector< float >	soft_decision_maker (gr_complex sample)
	Returns the soft decisions for the given sample. More...

Static Public Member Functions
static sptr	make (std::vector< gr_complex > constell, std::vector< int > pre_diff_code, unsigned int n_sectors)

Protected Member Functions
unsigned int	get_sector (const gr_complex *sample)
unsigned int	calc_sector_value (unsigned int sector)
	constellation_psk (std::vector< gr_complex > constell, std::vector< int > pre_diff_code, unsigned int n_sectors)
Protected Member Functions inherited from gr::digital::constellation_sector
void	find_sector_values ()
Protected Member Functions inherited from gr::digital::constellation
float	get_distance (unsigned int index, const gr_complex *sample)
unsigned int	get_closest_point (const gr_complex *sample)
void	calc_arity ()
void	max_min_axes ()

Additional Inherited Members
Protected Attributes inherited from gr::digital::constellation_sector
unsigned int	n_sectors
Protected Attributes inherited from gr::digital::constellation
std::vector< gr_complex >	d_constellation
std::vector< int >	d_pre_diff_code
bool	d_apply_pre_diff_code
unsigned int	d_rotational_symmetry
unsigned int	d_dimensionality
unsigned int	d_arity
float	d_scalefactor
	The factor by which the user given constellation points were scaled by to achieve an average amplitude of 1. More...
float	d_re_min
float	d_re_max
float	d_im_min
float	d_im_max
std::vector< std::vector< float > >	d_soft_dec_lut
int	d_lut_precision
float	d_lut_scale

Detailed Description

constellation_psk

Constellation space is divided into pie slices sectors.

Each slice is associated with the nearest constellation point.

Works well for PSK but nothing else.

Assumes that there is a constellation point at 1.x

Member Typedef Documentation

sptr

typedef boost::shared_ptr<constellation_psk> gr::digital::constellation_psk::sptr

Constructor & Destructor Documentation

~constellation_psk()

gr::digital::constellation_psk::~constellation_psk

(

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constellation_psk()

gr::digital::constellation_psk::constellation_psk ( std::vector< gr_complex >  constell, std::vector< int >  pre_diff_code, unsigned int  n_sectors  )

protected

Member Function Documentation

calc_sector_value()

unsigned int gr::digital::constellation_psk::calc_sector_value ( unsigned int  sector )

protectedvirtual

Implements gr::digital::constellation_sector.

get_sector()

unsigned int gr::digital::constellation_psk::get_sector ( const gr_complex *  sample )

protectedvirtual

Implements gr::digital::constellation_sector.

make()

static sptr gr::digital::constellation_psk::make ( std::vector< gr_complex >  constell, std::vector< int >  pre_diff_code, unsigned int  n_sectors  )

static

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

• constellation.h