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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao IEEE Communications ...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
IEEE Communications Letters
Article . 2016 . Peer-reviewed
License: IEEE Copyright
Data sources: Crossref
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Nonbinary Quasi-Regular QC-LDPC Codes Derived From Cycle Codes

Authors: Wojciech Sulek;

Nonbinary Quasi-Regular QC-LDPC Codes Derived From Cycle Codes

Abstract

Nonbinary ultra sparse codes, particularly regular cycle codes, are known to approach Shannon-limit performance as the Galois field $ \mathrm {GF}(q)$ order is sufficiently large. Good cycle codes can result from a class of algebraically defined graphs called cages. Meanwhile, when smaller $q$ is desirable, the cycle codes are outperformed by quasi-regular codes. In this letter, we propose a code construction method that takes a cage as a starting point and then progressively inserts a few additional edges into the graph. The edge insertion is terminated as soon as the code performance stops improving. Our simulation results show that the obtained quasi-regular codes outperform cyclic codes for fields up to GF(64) and its performance is slightly better than the quasi-regular improved-Progressive Edge Growth-based codes. The proposed algorithm preserves the block-circulant structure of the initial cage-based graph; therefore, it can be used for structured or quasi-cyclic codes design.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
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