gr::random Class Reference

pseudo random number generator More...

#include <gnuradio/random.h>

Public Member Functions
	random (unsigned int seed=0, int min_integer=0, int max_integer=2)
	~random ()
void	reseed (unsigned int seed)
	Change the seed for the initialized number generator. seed = 0 initializes the random number generator with the system time. Note that a fast initialization of various instances can result in the same seed. More...
void	set_integer_limits (const int minimum, const int maximum)
int	ran_int ()
float	ran1 ()
	Uniform random numbers in the range [0.0, 1.0) More...
float	gasdev ()
	Normally distributed random numbers (Gaussian distribution with zero mean and variance 1) More...
float	laplacian ()
	Laplacian distributed random numbers with zero mean and variance 1. More...
float	rayleigh ()
	Rayleigh distributed random numbers (zero mean and variance 1 for the underlying Gaussian distributions) More...
float	impulse (float factor)
	Exponentially distributed random numbers with values less than or equal to factor replaced with zero. The underlying exponential distribution has mean sqrt(2) and variance 2. More...
gr_complex	rayleigh_complex ()
	Normally distributed random numbers with zero mean and variance 1 on real and imaginary part. This results in a Rayleigh distribution for the amplitude and an uniform distribution for the phase. More...

Protected Attributes
long	d_seed
bool	d_gauss_stored
float	d_gauss_value
boost::mt19937 *	d_rng
boost::uniform_real< float > *	d_uniform
boost::uniform_int *	d_integer_dis
boost::variate_generator< boost::mt19937 &, boost::uniform_real< float > > *	d_generator
boost::variate_generator< boost::mt19937 &, boost::uniform_int<> > *	d_integer_generator

Detailed Description

pseudo random number generator

Constructor & Destructor Documentation

random()

gr::random::random	(	unsigned int	seed = 0,
		int	min_integer = 0,
		int	max_integer = 2
	)

~random()

gr::random::~random

(

)

Member Function Documentation

gasdev()

float gr::random::gasdev

(

)

Normally distributed random numbers (Gaussian distribution with zero mean and variance 1)

impulse()

float gr::random::impulse

(

float

factor

)

Exponentially distributed random numbers with values less than or equal to factor replaced with zero. The underlying exponential distribution has mean sqrt(2) and variance 2.

laplacian()

float gr::random::laplacian

(

)

Laplacian distributed random numbers with zero mean and variance 1.

ran1()

float gr::random::ran1

(

)

Uniform random numbers in the range [0.0, 1.0)

ran_int()

int gr::random::ran_int

(

)

Uniform random integers in the range set by 'set_integer_limits' [min, max).

rayleigh()

float gr::random::rayleigh

(

)

Rayleigh distributed random numbers (zero mean and variance 1 for the underlying Gaussian distributions)

rayleigh_complex()

gr_complex gr::random::rayleigh_complex

(

)

Normally distributed random numbers with zero mean and variance 1 on real and imaginary part. This results in a Rayleigh distribution for the amplitude and an uniform distribution for the phase.

reseed()

void gr::random::reseed

(

unsigned int

seed

)

Change the seed for the initialized number generator. seed = 0 initializes the random number generator with the system time. Note that a fast initialization of various instances can result in the same seed.

set_integer_limits()

void gr::random::set_integer_limits	(	const int	minimum,
		const int	maximum
	)

set minimum and maximum for integer random number generator. Limits are [minimum, maximum) Default: [0, std::numeric_limits< IntType >::max)]

Member Data Documentation

d_gauss_stored

bool gr::random::d_gauss_stored

protected

d_gauss_value

float gr::random::d_gauss_value

protected

d_generator

boost::variate_generator<boost::mt19937&, boost::uniform_real<float> >* gr::random::d_generator

protected

d_integer_dis

boost::uniform_int* gr::random::d_integer_dis

protected

d_integer_generator

boost::variate_generator<boost::mt19937&, boost::uniform_int<> >* gr::random::d_integer_generator

protected

d_rng

boost::mt19937* gr::random::d_rng

protected

d_seed

long gr::random::d_seed

protected

d_uniform

boost::uniform_real<float>* gr::random::d_uniform

protected

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

• random.h