Viterbi Decoder: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
DVB-T Viterbi decoder.
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.
ETSI EN 300 744 Clause 4.3.3
Mother convolutional code with rate 1/2.
k=1, n=2, K=6.
Generator polynomial G1=171(OCT), G2=133(OCT).
Punctured to obtain rates of 2/3, 3/4, 5/6, 7/8.
 
Data Input format:  
        000000X0X1 - QPSK.
        0000X0X1X2X3 - 16QAM.
        00X0X1X2X3X4X5 - 64QAM.
Data Output format: Packed bytes (each bit is data).  
        MSB - first, LSB last.


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


; Param 1 (''R'')
; Constellation type
: 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).
: constellation used.
 
; Hierarchy type
: hierarchy used.
 
; Code rate
: Coderate used.


; Param 2
; Block size
: blah blah blah
: Block size.


== 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-dtv/examples/dvbt_rx_8k.grc].
 
[[File:Dvbt_rx_8k_fg.png|800px]]


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

Latest revision as of 14:21, 30 November 2020

DVB-T Viterbi decoder.

ETSI EN 300 744 Clause 4.3.3 Mother convolutional code with rate 1/2. k=1, n=2, K=6. Generator polynomial G1=171(OCT), G2=133(OCT). Punctured to obtain rates of 2/3, 3/4, 5/6, 7/8.

Data Input format: 

       000000X0X1 - QPSK. 
       0000X0X1X2X3 - 16QAM. 
       00X0X1X2X3X4X5 - 64QAM.

Data Output format: Packed bytes (each bit is data). 

       MSB - first, LSB last.

Parameters

Constellation type
constellation used.
Hierarchy type
hierarchy used.
Code rate
Coderate used.
Block size
Block size.

Example Flowgraph

This flowgraph can be found at [1].

Dvbt rx 8k fg.png

Source Files

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