A probe for computing SNR of a signal. More...
#include <probe_mpsk_snr_est_c.h>
Public Types | |
| typedef boost::shared_ptr < probe_mpsk_snr_est_c > | sptr |
Public Member Functions | |
| virtual double | snr ()=0 |
| Return the estimated signal-to-noise ratio in decibels. | |
| virtual snr_est_type_t | type () const =0 |
| Return the type of estimator in use. | |
| virtual int | msg_nsample () const =0 |
| Return how many samples between SNR messages. | |
| virtual double | alpha () const =0 |
| Get the running-average coefficient. | |
| virtual void | set_type (snr_est_type_t t)=0 |
| Set type of estimator to use. | |
| virtual void | set_msg_nsample (int n)=0 |
| Set the number of samples between SNR messages. | |
| virtual void | set_alpha (double alpha)=0 |
| Set the running-average coefficient. | |
Static Public Member Functions | |
| static sptr | make (snr_est_type_t type, int msg_nsamples=10000, double alpha=0.001) |
Detailed Description
A probe for computing SNR of a signal.
This is a probe block (a sink) that can be used to monitor and retrieve estimations of the signal SNR. This probe is designed for use with M-PSK signals especially. The type of estimator is specified as the type parameter in the constructor. The estimators tend to trade off performance for accuracy, although experimentation should be done to figure out the right approach for a given implementation. Further, the current set of estimators are designed and proven theoretically under AWGN conditions; some amount of error should be assumed and/or estimated for real channel conditions.
Member Typedef Documentation
Member Function Documentation
| virtual double gr::digital::probe_mpsk_snr_est_c::alpha | ( | ) | const [pure virtual] |
Get the running-average coefficient.
| static sptr gr::digital::probe_mpsk_snr_est_c::make | ( | snr_est_type_t | type, |
| int | msg_nsamples = 10000, |
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| double | alpha = 0.001 |
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| ) | [static] |
Make an MPSK SNR probe.
Parameters:
- Parameters:
-
type,: the type of estimator to use see gr::digital::snr_est_type_t for details about the types. msg_nsamples,: [not implemented yet] after this many samples, a message containing the SNR (key='snr') will be sent alpha,: the update rate of internal running average calculations.
| virtual int gr::digital::probe_mpsk_snr_est_c::msg_nsample | ( | ) | const [pure virtual] |
Return how many samples between SNR messages.
| virtual void gr::digital::probe_mpsk_snr_est_c::set_alpha | ( | double | alpha | ) | [pure virtual] |
Set the running-average coefficient.
| virtual void gr::digital::probe_mpsk_snr_est_c::set_msg_nsample | ( | int | n | ) | [pure virtual] |
Set the number of samples between SNR messages.
| virtual void gr::digital::probe_mpsk_snr_est_c::set_type | ( | snr_est_type_t | t | ) | [pure virtual] |
Set type of estimator to use.
| virtual double gr::digital::probe_mpsk_snr_est_c::snr | ( | ) | [pure virtual] |
Return the estimated signal-to-noise ratio in decibels.
| virtual snr_est_type_t gr::digital::probe_mpsk_snr_est_c::type | ( | ) | const [pure virtual] |
Return the type of estimator in use.
The documentation for this class was generated from the following file:
