Numerical Issues Affecting LDPC Error Floors
Information Theory
2012-08-08 v1 Numerical Analysis
math.IT
Numerical Analysis
Abstract
Numerical issues related to the occurrence of error floors in floating-point simulations of belief propagation (BP) decoders are examined. Careful processing of messages corresponding to highly-certain bit values can sometimes reduce error floors by several orders of magnitude. Computational solutions for properly handling such messages are provided for the sum-product algorithm (SPA) and several variants.
Cite
@article{arxiv.1208.1326,
title = {Numerical Issues Affecting LDPC Error Floors},
author = {Brian K. Butler and Paul H. Siegel},
journal= {arXiv preprint arXiv:1208.1326},
year = {2012}
}
Comments
7 pages, 5 figures. Submitted to IEEE Globecom (Selected Area of Communications Data Storage Track)