論文

2017年12月1日

Spatially "Mt. Fuji" Coupled LDPC codes

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
  • Yuta Nakahara
  • ,
  • Shota Saito
  • ,
  • Toshiyasu Matsushima

E100A
12
開始ページ
2594
終了ページ
2606
記述言語
英語
掲載種別
研究論文(国際会議プロシーディングス)
DOI
10.1587/transfun.E100.A.2594
出版者・発行元
Institute of Electronics, Information and Communication, Engineers, IEICE

A new type of spatially coupled low density parity check (SCLDPC) code is proposed. This code has two benefits. (1) This code requires less number of iterations to correct the erasures occurring through the binary erasure channel in the waterfall region than that of the usual SCLDPC code. (2) This code has lower error floor than that of the usual SCLDPC code. Proposed code is constructed as a coupled chain of the underlying LDPC codes whose code lengths exponentially increase as the position where the codes exist is close to the middle of the chain. We call our code spatially "Mt. Fuji" coupled LDPC (SFCLDPC) code because the shape of the graph representing the code lengths of underlying LDPC codes at each position looks like Mt. Fuji. By this structure, when the proposed SFCLDPC code and the original SCLDPC code are constructed with the same code rate and the same code length, L (the number of the underlying LDPC codes) of the proposed SFCLDPC code becomes smaller and M (the code lengths of the underlying LDPC codes) of the proposed SFCLDPC code becomes larger than those of the SCLDPC code. These properties of L and M enables the above reduction of the number of iterations and the bit error rate in the error floor region, which are confirmed by the density evolution and computer simulations.

リンク情報
DOI
https://doi.org/10.1587/transfun.E100.A.2594
ID情報
  • DOI : 10.1587/transfun.E100.A.2594
  • ISSN : 1745-1337
  • ISSN : 0916-8508
  • SCOPUS ID : 85038209366

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