RRC Filter Taps: Difference between revisions

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[[Category:Block Docs]]
[[Category:Stub Docs]]
This is a convenience wrapper for calling firdes.root_raised_cosine().  A root-raised-cosine (RRC) filter is one of the most common pulse shaping filters in digital communications systems, used to perform matched filtering. See [https://en.wikipedia.org/wiki/Root-raised-cosine_filter RRC filter at wikipedia] for more info on RRC filtering.
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 ==
; Gain
: Overall gain of filter (default 1.0)
 
; Sample Rate
: Sample rate in samples per second.


== Parameters ==
; Symbol Rate
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
: Symbol rate, must be a factor of sample rate. Typically ((samples/second) / (samples/symbol)).


; Param 1 (''R'')
; Excess BW
: 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).
: Excess bandwidth factor, also known as alpha. (default: 0.35)


; Param 2
; Num Taps
: blah blah blah
: Number of taps (default: 11*samp_rate)


== 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 can be found at [https://github.com/gnuradio/gnuradio/blob/master/gr-filter/examples/filter_taps.grc].
 
[[File:Filter_taps_fg.png|800px]]


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

Revision as of 22:49, 4 March 2021

This is a convenience wrapper for calling firdes.root_raised_cosine(). A root-raised-cosine (RRC) filter is one of the most common pulse shaping filters in digital communications systems, used to perform matched filtering. See RRC filter at wikipedia for more info on RRC filtering.

Parameters

Gain
Overall gain of filter (default 1.0)
Sample Rate
Sample rate in samples per second.
Symbol Rate
Symbol rate, must be a factor of sample rate. Typically ((samples/second) / (samples/symbol)).
Excess BW
Excess bandwidth factor, also known as alpha. (default: 0.35)
Num Taps
Number of taps (default: 11*samp_rate)

Example Flowgraph

This flowgraph can be found at [1].

Filter taps fg.png

Source Files

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