Peak Detector: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
Detect the peak of a signal.
This is the template for the [[:Category:Block_Docs|"Page-per-block Docs"]].  This first section should describe what the block does and how to use it, using however many paragraphs necessary.  Note that the title of the wiki page should match the block's name in GRC, i.e. the one defined in the block's .grc file.  Look at the [[FFT]] Block for a good example.


As this is a basic template, it's also in the [[:Category:Stub_Docs|"Stub Docs category"]]. Please improve it.
If a peak is detected, this block outputs a 1, else it outputs 0's.


== Parameters ==
== Parameters ==
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>


; Param 1 (''R'')
; TH factor rise (''R'')
: Description of parameter, provide any tips or recommended values.  Note that the name of the parameter above should match the param's label that shows up in grc (e.g. Sample Rate).
: Determines 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.


; Param 2
; TH factor fall (''R'')
: blah blah blah
: Determines when a peak has ended. An average of the signal is calculated and when the value of the signal goes below threshold_factor_fall*average, we stop looking for a peak.
 
; Look ahead (''R'')
: Used when the threshold is found to look if there is 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 (''R'')
: The gain value of a moving average filter


== Example Flowgraph ==
== Example Flowgraph ==


Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.
[[File:Peak_detector_fg.png]]
 
<p>This flowgraph can be downloaded from [[Media:Peak_detector.grc]].</p>


== Source Files ==
== Source Files ==

Latest revision as of 16:47, 28 April 2025

Detect the peak of a signal.

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

Parameters

(R): Run-time adjustable

TH factor rise (R)
Determines 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.
TH factor fall (R)
Determines when a peak has ended. An average of the signal is calculated and when the value of the signal goes below threshold_factor_fall*average, we stop looking for a peak.
Look ahead (R)
Used when the threshold is found to look if there is 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 (R)
The gain value of a moving average filter

Example Flowgraph

Peak detector fg.png

This flowgraph can be downloaded from Media:Peak_detector.grc.

Source Files

C++ files
TODO
Header files
TODO
Public header files
TODO
Block definition
TODO
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