Randomizer: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
An ITU-T J.83B randomizer.
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.
Randomizer: x^3 + x + alpha^3, 7-bit symbols.
 
; Input: Interleaved MPEG-2 + RS parity bitstream packets of 128 7-bit symbols.
; Output: Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit symbols.


== Parameters ==
== Parameters ==
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
; Param 1 (''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).


; Param 2
; Constellation
: blah blah blah
: 64QAM or 256QAM constellation.


== Example Flowgraph ==
== Example Flowgraph ==
Line 21: Line 19:


; C++ files
; C++ files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-dtv/lib/catv/catv_randomizer_bb_impl.cc]


; Header files
; Header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-dtv/lib/catv/catv_randomizer_bb_impl.h]


; Public header files
; Public header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-dtv/include/gnuradio/dtv/catv_randomizer_bb.h]


; Block definition
; Block definition
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-dtv/grc/dtv_catv_randomizer_bb.block.yml]

Latest revision as of 13:32, 11 September 2019

An ITU-T J.83B randomizer.

Randomizer: x^3 + x + alpha^3, 7-bit symbols.

Input
Interleaved MPEG-2 + RS parity bitstream packets of 128 7-bit symbols.
Output
Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit symbols.

Parameters

Constellation
64QAM or 256QAM constellation.

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
[1]
Header files
[2]
Public header files
[3]
Block definition
[4]
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