gr_peak_detector_sb Class Reference

Detect the peak of a signalIf a peak is detected, this block outputs a 1, or it outputs 0's. More...

#include <gr_peak_detector_sb.h>

Inheritance diagram for gr_peak_detector_sb:

List of all members.

Public Member Functions
void	set_threshold_factor_rise (float thr)
	Set the threshold factor value for the rise time.
void	set_threshold_factor_fall (float thr)
	Set the threshold factor value for the fall time.
void	set_look_ahead (int look)
	Set the look-ahead factor.
void	set_alpha (int alpha)
	Set the running average alpha.
float	threshold_factor_rise ()
	Get the threshold factor value for the rise time.
float	threshold_factor_fall ()
	Get the threshold factor value for the fall time.
int	look_ahead ()
	Get the look-ahead factor value.
float	alpha ()
	Get the alpha value of the running average.
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
Friends
gr_peak_detector_sb_sptr	gr_make_peak_detector_sb (float threshold_factor_rise, float threshold_factor_fall, int look_ahead, float alpha)

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Detailed Description

Detect the peak of a signal

If a peak is detected, this block outputs a 1, or it outputs 0's.

Parameters:

threshold_factor_rise	The threshold factor determins when a peak has started. An average of the signal is calculated and when the value of the signal goes over threshold_factor_rise*average, we start looking for a peak.
threshold_factor_fall	The threshold factor determins when a peak has ended. An average of the signal is calculated and when the value of the signal goes bellow threshold_factor_fall*average, we stop looking for a peak.
look_ahead	The look-ahead value is used when the threshold is found to look if there another peak within this step range. If there is a larger value, we set that as the peak and look ahead again. This is continued until the highest point is found with This look-ahead range.
alpha	The gain value of a moving average filter

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Member Function Documentation

float gr_peak_detector_sb::alpha

(

)

[inline]

Get the alpha value of the running average.

Returns:

alpha

Referenced by set_alpha().

int gr_peak_detector_sb::look_ahead

(

)

[inline]

Get the look-ahead factor value.

Returns:

look-ahead factor

void gr_peak_detector_sb::set_alpha

(

int

alpha

)

[inline]

Set the running average alpha.

Parameters:

alpha

new alpha for running average

References alpha().

void gr_peak_detector_sb::set_look_ahead

(

int

look

)

[inline]

Set the look-ahead factor.

Parameters:

look	new look-ahead factor

void gr_peak_detector_sb::set_threshold_factor_fall

(

float

thr

)

[inline]

Set the threshold factor value for the fall time.

Parameters:

thr	new threshold factor

void gr_peak_detector_sb::set_threshold_factor_rise

(

float

thr

)

[inline]

Set the threshold factor value for the rise time.

Parameters:

thr	new threshold factor

float gr_peak_detector_sb::threshold_factor_fall

(

)

[inline]

Get the threshold factor value for the fall time.

Returns:

threshold factor

float gr_peak_detector_sb::threshold_factor_rise

(

)

[inline]

Get the threshold factor value for the rise time.

Returns:

threshold factor

int gr_peak_detector_sb::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.

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Friends And Related Function Documentation

gr_peak_detector_sb_sptr gr_make_peak_detector_sb	(	float	threshold_factor_rise,
		float	threshold_factor_fall,
		int	look_ahead,
		float	alpha
	)		[friend]

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

• gr_peak_detector_sb.h