Construction of Length and Rate Adaptive MET QC-LDPC Codes by Cyclic Group Decomposition
Vasiliy S. Usatyuk, Egorov Sergey, German Svistunov · 2019
We introduce a quasi-cyclic construction method for improving performance of length and rate adaptive Multi-Edge Type LDPC (MET-LDPC)codes below Block Error Rate (BLER)10-5Proposed method allows to construct nested code families with a code length variability based on 5G eMBB modular lifting of Base Graph 2. Constructed codes are optimized by code distance and graph properties. Simulation results under 50 iterations of sum-product decoding over an AWGN channel with QPSK modulation are provided for comparing to 5G eMBB codes. It shows near the same performance for information length , 0.1 - 0.3 dB coding gain on under rate 1/3, and coding gain around 0.3 dB under rate 1/5.