Self-Connected Spatially Coupled LDPC Codes with Improved Termination
Yihuan Liao, Min Qiu, Jinhong Yuan

TL;DR
This paper introduces self-connected spatially coupled LDPC codes with a novel termination method that reduces rate loss and enhances decoding performance, achieving better capacity gap and threshold saturation.
Contribution
It proposes a new self-connection and termination approach for SC-LDPC codes, improving rate efficiency and decoding thresholds compared to existing designs.
Findings
Reduced rate loss with single-side open ensemble
Improved decoding threshold and capacity gap
Finite blocklength performance demonstrates superiority
Abstract
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.
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Taxonomy
TopicsError Correcting Code Techniques · Advanced Wireless Communication Techniques · Telecommunications and Broadcasting Technologies
