Difference between revisions of "LDPC Encoder Definition (via Generator)"

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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_encoders.grc]

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

Latest revision as of 13:54, 3 December 2020

A standard encoder class. This method is discussed in many textbooks; one is: Turbo Coding for Satellite and Wireless Communications by Soleymani, Gao, and Vilaipornsawai.

Given a generator matrix in systematic form, G = [I|P], where I is the identity matrix and P is the parity submatrix, the information word s is encoded into a codeword x via:

x = G'*s


For parallel execution of multiple instances of the block (more info is needed on this)
Dimension 1
For parallelism
Dimension 2
For parallelism
LDPC generator matrix
The ldpc_G_matrix object to use for encoding.

Example Flowgraph[edit]

This flowgraph can be found at [1]

Fecapi ldpc encoders fg.png

Source Files[edit]

C++ files
Header files
Public header files
Block definition