gr::digital::mpsk_snr_est_simple Class Reference

SNR Estimator using simple mean/variance estimates. More...

#include <gnuradio/digital/mpsk_snr_est.h>

Inheritance diagram for gr::digital::mpsk_snr_est_simple:

Public Member Functions
	mpsk_snr_est_simple (double alpha)
	~mpsk_snr_est_simple ()
int	update (int noutput_items, const gr_complex *input)
	Update the current registers. More...
double	snr ()
	Use the register values to compute a new estimate. More...
Public Member Functions inherited from gr::digital::mpsk_snr_est
	mpsk_snr_est (double alpha)
virtual	~mpsk_snr_est ()
double	alpha () const
	Get the running-average coefficient. More...
void	set_alpha (double alpha)
	Set the running-average coefficient. More...

Additional Inherited Members
Protected Attributes inherited from gr::digital::mpsk_snr_est
double	d_alpha
double	d_beta

Detailed Description

SNR Estimator using simple mean/variance estimates.

A very simple SNR estimator that just uses mean and variance estimates of an M-PSK constellation. This esimator is quick and cheap and accurate for high SNR (above 7 dB or so) but quickly starts to overestimate the SNR at low SNR.

Constructor & Destructor Documentation

gr::digital::mpsk_snr_est_simple::mpsk_snr_est_simple

(

double

alpha

)

Constructor

Parameters:

Parameters

alpha

the update rate of internal running average calculations.

gr::digital::mpsk_snr_est_simple::~mpsk_snr_est_simple ( )

inline

Member Function Documentation

double gr::digital::mpsk_snr_est_simple::snr ( )

virtual

Use the register values to compute a new estimate.

Reimplemented from gr::digital::mpsk_snr_est.

int gr::digital::mpsk_snr_est_simple::update ( int  noutput_items, const gr_complex *  input  )

virtual

Update the current registers.

Reimplemented from gr::digital::mpsk_snr_est.

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

• mpsk_snr_est.h