This paper investigates the design of self-connected spatially coupled low-density parity-check (SC-LDPC) codes. First, a termination method is proposed to reduce rate loss. Particularly, a single-side open SC-LDPC ensemble is introduced, which halves the rate loss of a conventional terminated SC-LDPC by reducing the number of check nodes. We further propose a self-connection method that allows reliable information to propagate from several directions to improve the decoding threshold. We demonstrate that the proposed ensembles not only achieve a better trade-off between rate loss and gap to capacity than several existing protograph SC-LDPC codes with short chain lengths but also exhibit threshold saturation behavior. Finite blocklength error performance is provided to exemplify the superiority of the proposed codes over conventional protograph SC-LDPC codes.
@article{arxiv.2306.17451,
title = {Self-Connected Spatially Coupled LDPC Codes with Improved Termination},
author = {Yihuan Liao and Min Qiu and Jinhong Yuan},
journal= {arXiv preprint arXiv:2306.17451},
year = {2023}
}
Comments
6 pages, 8 figures, accepted for publication in IEEE Communications Letters