LDPC Decoder Definition: Difference between revisions

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== 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-fec/examples/fecapi_ldpc_decoders.grc]
 
[[File:Fecapi_ldpc_decoders_fg.png|800px]]


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

Latest revision as of 13:37, 21 December 2021

This is a soft-decision decoder that uses belief propagation (also known as message passing) that is described at:

[1]

Designed for a memoryless AWGN channel, it assumes a noise variance of the value specified for sigma.

Parameters

Parallelism
For parallel execution of multiple instances of the block (more info is needed on this)
Dimension 1
For parallelism
Dimension 2
For parallelism
AList file
Name of an alist file to use.
Sigma
Noise variance of the channel
Max iterations
Maximum number of iteration for the message passing algorithm

Example Flowgraph

This flowgraph can be found at [2]

Fecapi ldpc decoders fg.png

Source Files

C++ files
[3]
Public header files
[4]
Block definition
[5]
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