FM Demod: Difference between revisions

From GNU Radio
Jump to navigation Jump to search
(Created page with "Category:Block Docs Category:Stub Docs This is the template for the "Page-per-block Docs". This first section should describe what the block...")
 
No edit summary
Line 1: Line 1:
[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
Generalized FM demodulation block with deemphasis and audio filtering.  This block demodulates a band-limited, complex down-converted FM channel into the the original baseband signal, optionally applying deemphasis. Low pass filtering is done on the resultant signal. It produces an output float stream in the range of [-1.0, +1.0].
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.
== Parameters ==
; Channel Rate
: Incoming sample rate of the FM baseband (integer)


== Parameters ==
; Audio Decimation
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
: Maximum FM deviation (default = 5000) (float)
 
; Deviation
: Input to output decimation rate (integer)
 
; Audio Pass
: Audio low pass filter passband frequency (float)
 
; Audio Stop
: Audio low pass filter stop frequency (float)


; Param 1 (''R'')
; Gain
: 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).
: Gain applied to audio output (default = 1.0) (float)


; Param 2
; Tau
: blah blah blah
: Deemphasis time constant (default = 75e-6), specify tau=0.0 to prevent deemphasis (float)


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

Revision as of 04:35, 21 July 2019

Generalized FM demodulation block with deemphasis and audio filtering. This block demodulates a band-limited, complex down-converted FM channel into the the original baseband signal, optionally applying deemphasis. Low pass filtering is done on the resultant signal. It produces an output float stream in the range of [-1.0, +1.0].

Parameters

Channel Rate
Incoming sample rate of the FM baseband (integer)
Audio Decimation
Maximum FM deviation (default = 5000) (float)
Deviation
Input to output decimation rate (integer)
Audio Pass
Audio low pass filter passband frequency (float)
Audio Stop
Audio low pass filter stop frequency (float)
Gain
Gain applied to audio output (default = 1.0) (float)
Tau
Deemphasis time constant (default = 75e-6), specify tau=0.0 to prevent deemphasis (float)

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.

Source Files

C++ files
TODO
Header files
TODO
Public header files
TODO
Block definition
TODO
Retrieved from "https://wiki.gnuradio.org/index.php?title=FM_Demod&oldid=5677"