Construction of multiple-rate QC-LDPC codes using hierarchical row-splitting

Zhao, Peiyao, Wang, Zhaocheng and Wang, Qi (2016) Construction of multiple-rate QC-LDPC codes using hierarchical row-splitting. IEEE Communications Letters, 20 (6), 1068-1071. (doi:10.1109/LCOMM.2016.2553658).

Record type: Article

Abstract

In this letter, we propose an improved method called hierarchical row-splitting with edge variation for designing multiple-rate quasi-cyclic low-density parity-check (QC-LDPC) codes, which constructs lower-rate codes from a high-rate mother code by row-splitting operations. Consequently, the obtained QC-LDPC codes with various code rates have the same blocklength and can share common hardware resources to reduce the implementation complexity. Compared with the conventional row-combining-based algorithms, a wider range of code rates are supported. Moreover, each individual rate code could be separately optimized, making it easier to find a set of multiple-rate QC-LDPC codes with good performance for all different rates. Simulation results demonstrate that the obtained codes outperform the counterparts from digital video broadcasting-second generation terrestrial.

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