Irregular Structured LDPC Codes
V.J. Stolpman, Nico van Waes · 2004
Abstract In this document, we describe a structured approach to irregular LDPC code construction based on “seed” matrices that are expanded using permutation matrices for purposes of error correction control. These codes have small storage requirements with good block error rate performances over a wide range block sizes. Also described in this document is a structured approach to puncturing irregular LDPC codes facilitate rate-compatibility without having to modify the connective net in the encoder or decoder while still offering a wide range of code rates for link optimization.