Reducing the Error Floor of the Sign-Preserving Min-Sum LDPC Decoder via Message Weighting of Low-Degree Variable Nodes

TL;DR

This paper introduces a method to reduce the error floor in low-complexity LDPC decoders by applying iteration-dependent weights to degree-3 variable nodes, significantly improving performance on the 802.3ca EPON code.

Contribution

It proposes a novel message weighting technique for low-degree variable nodes to mitigate error floors in LDPC decoding.

Findings

Error floor decreased by over 3 orders of magnitude on the 802.3ca EPON code

Effective for low-complexity LDPC decoders

Applicable to degree-3 variable nodes

Abstract

Some low-complexity LDPC decoders suffer from error floors. We apply iteration-dependent weights to the degree-3 variable nodes to solve this problem. When the 802.3ca EPON LDPC code is considered, an error floor decrease of more than 3 orders of magnitude is achieved.