GNU Radio Manual and C++ API Reference  3.7.9.2
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gr::digital::mpsk_snr_est_simple Class Reference

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

#include <gnuradio/digital/mpsk_snr_est.h>

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...
 
virtual double signal ()
 Returns the signal power estimate. More...
 
virtual double noise ()
 Returns the noise power estimate. More...
 

Additional Inherited Members

- Protected Attributes inherited from gr::digital::mpsk_snr_est
double d_alpha
 
double d_beta
 
double d_signal
 
double d_noise
 

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
alphathe 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.


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