A probe for computing SNR of a signal. More...
#include <digital_probe_mpsk_snr_est_c.h>
Public Member Functions | |
| ~digital_probe_mpsk_snr_est_c () | |
| int | work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
| just like gr_block::general_work, only this arranges to call consume_each for you | |
| double | snr () |
| Return the estimated signal-to-noise ratio in decibels. | |
| snr_est_type_t | type () const |
| Return the type of estimator in use. | |
| int | msg_nsample () const |
| Return how many samples between SNR messages. | |
| double | alpha () const |
| Get the running-average coefficient. | |
| void | set_type (snr_est_type_t t) |
| Set type of estimator to use. | |
| void | set_msg_nsample (int n) |
| Set the number of samples between SNR messages. | |
| void | set_alpha (double alpha) |
| Set the running-average coefficient. | |
Friends | |
| DIGITAL_API digital_probe_mpsk_snr_est_c_sptr | digital_make_probe_mpsk_snr_est_c (snr_est_type_t type, int msg_nsamples, double alpha) |
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.
Constructor & Destructor Documentation
| digital_probe_mpsk_snr_est_c::~digital_probe_mpsk_snr_est_c | ( | ) |
Member Function Documentation
| double digital_probe_mpsk_snr_est_c::alpha | ( | ) | const |
Get the running-average coefficient.
| int digital_probe_mpsk_snr_est_c::msg_nsample | ( | ) | const |
Return how many samples between SNR messages.
| void digital_probe_mpsk_snr_est_c::set_alpha | ( | double | alpha | ) |
Set the running-average coefficient.
| void digital_probe_mpsk_snr_est_c::set_msg_nsample | ( | int | n | ) |
Set the number of samples between SNR messages.
| void digital_probe_mpsk_snr_est_c::set_type | ( | snr_est_type_t | t | ) |
Set type of estimator to use.
| double digital_probe_mpsk_snr_est_c::snr | ( | ) |
Return the estimated signal-to-noise ratio in decibels.
| snr_est_type_t digital_probe_mpsk_snr_est_c::type | ( | ) | const |
Return the type of estimator in use.
| int digital_probe_mpsk_snr_est_c::work | ( | int | noutput_items, |
| gr_vector_const_void_star & | input_items, | ||
| gr_vector_void_star & | output_items | ||
| ) | [virtual] |
just like gr_block::general_work, only this arranges to call consume_each for you
The user must override work to define the signal processing code
Implements gr_sync_block.
Friends And Related Function Documentation
| DIGITAL_API digital_probe_mpsk_snr_est_c_sptr digital_make_probe_mpsk_snr_est_c | ( | snr_est_type_t | type, |
| int | msg_nsamples, | ||
| double | alpha | ||
| ) | [friend] |
Factory function returning shared pointer of this class
Parameters:
- Parameters:
-
type,: the type of estimator to use snr_est_type_t for details about the available 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.
The documentation for this class was generated from the following file:
