PLL Carrier Regeneration: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
Implements a PLL which locks to the input frequency and outputs a carrier.
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.
This PLL locks onto a [possibly noisy] reference carrier on the input and outputs a clean version which is phase and frequency aligned to it.


== 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'')
; Loop bandwidth (''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).
: The loop bandwidth determines the lock range and should be set around pi/200  2pi/100.


; Param 2
; Max freq
: blah blah blah
: Maximum frequency of the carrier in radians per sample
 
; Min freq
: Minimum frequency of the carrier in radians per sample


== 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.
This flowgraph implements a Broadcast FM stereo receiver using basic blocks. The PLL captures the 19kHz pilot carrier.
 
[[File:USRP_FM_stereo_fg.png|644px]]


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

Latest revision as of 12:40, 18 May 2023

Implements a PLL which locks to the input frequency and outputs a carrier.

This PLL locks onto a [possibly noisy] reference carrier on the input and outputs a clean version which is phase and frequency aligned to it.

Parameters

(R): Run-time adjustable

Loop bandwidth (R)
The loop bandwidth determines the lock range and should be set around pi/200 2pi/100.
Max freq
Maximum frequency of the carrier in radians per sample
Min freq
Minimum frequency of the carrier in radians per sample

Example Flowgraph

This flowgraph implements a Broadcast FM stereo receiver using basic blocks. The PLL captures the 19kHz pilot carrier.

USRP FM stereo fg.png

Source Files

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