Measurement Tools

Classes
class	gr::analog::probe_avg_mag_sqrd_c
	compute avg magnitude squared. More...
class	gr::analog::probe_avg_mag_sqrd_cf
	compute avg magnitude squared. More...
class	gr::analog::probe_avg_mag_sqrd_f
	compute avg magnitude squared. More...
class	gr::blocks::ctrlport_probe2_b
	A ControlPort probe to export vectors of signals. More...
class	gr::blocks::ctrlport_probe2_c
	A ControlPort probe to export vectors of signals. More...
class	gr::blocks::ctrlport_probe2_f
	A ControlPort probe to export vectors of signals. More...
class	gr::blocks::ctrlport_probe2_i
	A ControlPort probe to export vectors of signals. More...
class	gr::blocks::ctrlport_probe2_s
	A ControlPort probe to export vectors of signals. More...
class	gr::blocks::ctrlport_probe_c
	A ControlPort probe to export vectors of signals. More...
class	gr::blocks::message_debug
	Debug block for the message passing system. More...
class	gr::blocks::probe_rate
	throughput measurement More...
class	gr::blocks::probe_signal< T >
	Sink that allows a sample to be grabbed from Python. More...
class	gr::blocks::probe_signal_v< T >
	Sink that allows a vector of samples to be grabbed from Python. More...
class	gr::blocks::tag_debug
	Bit bucket that prints out any tag received. More...
class	gr::blocks::test_tag_variable_rate_ff
	Used for testing tag propagation.This block resamples the stream by a factor that starts at 0.5 but varies around by some random walk. The relative rate of the block is initialized to 0.5 and the random number generator is seeded based on the time. For each input, if the random number is >= 0.5, the relative rate is increased by update_step; otherwise, it is decreased by update_step. More...
class	gr::digital::mpsk_snr_est_cc
	A block for computing SNR of a signal. More...
class	gr::digital::probe_density_b
class	gr::digital::probe_mpsk_snr_est_c
	A probe for computing SNR of a PSK signal. More...
class	gr::fft::ctrlport_probe_psd
	A ControlPort probe to export vectors of signals. More...

Enumerations
enum	gr::digital::snr_est_type_t { gr::digital::SNR_EST_SIMPLE = 0, gr::digital::SNR_EST_SKEW, gr::digital::SNR_EST_M2M4, gr::digital::SNR_EST_SVR }
	A block for computing SNR of a signal. More...

Detailed Description

Enumeration Type Documentation

snr_est_type_t

enum gr::digital::snr_est_type_t

A block for computing SNR of a signal.

Below are some ROUGH estimates of what values of SNR each of these types of estimators is good for. In general, these offer a trade-off between accuracy and performance.

• SNR_EST_SIMPLE: Simple estimator (>= 7 dB)
• SNR_EST_SKEW: Skewness-base est (>= 5 dB)
• SNR_EST_M2M4: 2nd & 4th moment est (>= 1 dB)
• SNR_EST_SVR: SVR-based est (>= 0dB)

Enumerator
SNR_EST_SIMPLE
SNR_EST_SKEW
SNR_EST_M2M4
SNR_EST_SVR