Campus Units
Electrical and Computer Engineering, Mathematics
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
7-28-2009
Journal or Book Title
IEEE Journal on Selected Areas in Communications
Volume
27
Issue
6
First Page
889
Last Page
898
DOI
10.1109/JSAC.2009.090807
Abstract
We consider the design and analysis of the efficiently-encodable rate-compatible (E2RC) irregular LDPC codes proposed in previous work. In this work we introduce semi-structured E2RC-like codes and protograph E2RC codes. EXIT chart based methods are developed for the design of semi-structured E2RC-like codes that allow us to determine near-optimal degree distributions for the systematic part of the code while taking into account the structure of the deterministic parity part, thus resolving one of the open issues in the original construction. We develop a fast EXIT function computation method that does not rely on Monte-Carlo simulations and can be used in other scenarios as well. Our approach allows us to jointly optimize code performance across the range of rates under puncturing. We then consider protograph E2RC codes (that have a protograph representation) and propose rules for designing a family of rate-compatible punctured protographs with low thresholds. For both the semi-structured and protograph E2RC families we obtain codes whose gap to capacity is at most 0.3 dB across the range of rates when the maximum variable node degree is twenty.
Rights
Copyright 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Copyright Owner
IEEE
Copyright Date
2009
Language
en
File Format
application/pdf
Recommended Citation
Shi, Cuizhu and Ramamoorthy, Aditya, "Design and analysis of E² RC codes" (2009). Electrical and Computer Engineering Publications. 124.
https://lib.dr.iastate.edu/ece_pubs/124
Comments
This is a manuscript of an article from IEEE Journal on Selected Areas in Communications 27 (2009): 889, doi: 10.1109/JSAC.2009.090807. Posted with permission.