Protograph Sieving Method for Construction Moderate Length Multi-Edge Type QC-LDPC Codes
German Svistunov, Vasiliy S. Usatyuk, Egorov Sergey · 2019
We introduce the protograph sieving method as a tool for optimization of moderate length Multi-Edge Type Quasi-Cyclic Low-Density Parity-Check (MET QC-LDPC)codes. The proposed method allows to improve code distance property with defined graph balanced cycles and construct MET-LDPC protograph for the code length in gap between Scattering PEXIT-chart and Covariance Evolution methods. We show that this approach improves code distance properties and achieves 0.2 dB gain in terms of block error rate (BLER)over the additive white Gaussian noise (AWGN)channel for information length of 600 bits and rate 1/3, at a target BLER of 10-6when compared to BG2 MET-LDPC code proposed at 5G standard.