English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Protograph-based Raptor-like low-density parity-check codes (PBRL codes) area recently proposed family of easily encodable and decodable rate-compatibleLDPC (RC-LDPC) codes. These codes have an excellent iterative decodingthreshold and performance across all design rates. PBRL codes designed thusfar, for both long and short block-lengths, have been based on optimizing theiterative decoding threshold of the protograph of the RC code family at variousdesign rates.  In this work, we propose a design method to obtain better quasi-cyclic (QC)RC-LDPC codes with PBRL structure for short block-lengths (of a few hundredbits). We achieve this by maximizing an upper bound on the minimum distance ofany QC-LDPC code that can be obtained from the protograph of a PBRL ensemble.The obtained codes outperform the original PBRL codes at short block-lengths bysignificantly improving the error floor behavior at all design rates.Furthermore, we identify a reduction in complexity of the design procedure,facilitated by the general structure of a PBRL ensemble.

Design of Improved Quasi-Cyclic Protograph-Based Raptor-Like LDPC Codes for Short Block-Lengths