gr_peak_detector2_fb Class Reference
[Signal Processing Blocks]

Detect the peak of a signal

If a peak is detected, this block outputs a 1, or it outputs 0's. A separate debug output may be connected, to view the internal EWMA described below. More...

#include <gr_peak_detector2_fb.h>

Inheritance diagram for gr_peak_detector2_fb:

[legend]

Collaboration diagram for gr_peak_detector2_fb:

[legend]

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_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.
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_detector2_fb_sptr	gr_make_peak_detector2_fb (float threshold_factor_rise, int look_ahead, float alpha)

---

Detailed Description

Detect the peak of a signal

If a peak is detected, this block outputs a 1, or it outputs 0's. A separate debug output may be connected, to view the internal EWMA described below.

Parameters:

	threshold_factor_rise	The threshold factor determins when a peak is present. An EWMA average of the signal is calculated and when the value of the signal goes over threshold_factor_rise*average, we call the peak.
	look_ahead	The look-ahead value is used when the threshold is found to locate the peak within this range.
	alpha	The gain value of a single-pole moving average filter

---

Member Function Documentation

float gr_peak_detector2_fb::alpha

(

)

[inline]

Get the alpha value of the running average.

Returns:

alpha

int gr_peak_detector2_fb::look_ahead

(

)

[inline]

Get the look-ahead factor value.

Returns:

look-ahead factor

void gr_peak_detector2_fb::set_alpha

(

int

alpha

)

[inline]

Set the running average alpha.

Parameters:

alpha

new alpha for running average

void gr_peak_detector2_fb::set_look_ahead

(

int

look

)

[inline]

Set the look-ahead factor.

Parameters:

look

new look-ahead factor

void gr_peak_detector2_fb::set_threshold_factor_rise

(

float

thr

)

[inline]

Set the threshold factor value for the rise time.

Parameters:

thr

new threshold factor

float gr_peak_detector2_fb::threshold_factor_rise

(

)

[inline]

Get the threshold factor value for the rise time.

Returns:

threshold factor

int gr_peak_detector2_fb::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

gr_peak_detector2_fb_sptr gr_make_peak_detector2_fb	(	float	threshold_factor_rise,
		int	look_ahead,
		float	alpha
	)			[friend]

---

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

• gr_peak_detector2_fb.h