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Research on M-ary Unidirectional Error Control Codes for Multi-Level Flash Memories

Research Project

Project/Area Number 26330059
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Computer system
Research InstitutionChiba University

Principal Investigator

Kitakami Masato  千葉大学, 大学院融合科学研究科, 准教授 (20282832)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords誤り制御符号 / 多レベルフラッシュメモリ / 単方向誤り / 隣接誤り / マルチページプログラミング / 誤り訂正符号 / フラッシュメモリ / 対称誤り
Outline of Final Research Achievements

In this research, effective codes for multi level cell flash memory capable of storing multi-bit value by one memory cell are developed. Here, multi level cell flash memory stores multi-bit value by gradually controlling the charge accumulated in the floating gate. We have developed a single adjacent error correction code that utilizes the fact that errors occurring in memory cells are limited to errors to neighboring values. In addition, in the multi-level cell flash memory, considering that multi-page programming is used to determine the value of a plurality of cells in a page from upper bits and a bit error correction code is used for each page. We have proposed an improved decoding method which achieves lower bit error rate.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report

Research Products

(7 results)

All 2017 2016 2015 2014

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] An Error Correction Method for Neighborhood-Level Errors in NAND Flash Memories2017

    • Author(s)
      Shohei Kotaki and Masato Kitakami
    • Journal Title

      IEICE Trans. Fundamentals

      Volume: E100-A Issue: 2 Pages: 653-662

    • DOI

      10.1587/transfun.e100.a.653

      10.1587/transfun.E100.A.653

    • NAID

      130005306024

    • ISSN
      0916-8508, 1745-1337
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] The Effective Method of Improving BerlekampPreparata Convolutional Codes Decoding by Tail-Biting Technology2016

    • Author(s)
      Tianyi Zhang and Masato Kitakami
    • Organizer
      2016 International Symposium on Information Theory and Its Applications
    • Place of Presentation
      モントレー(米国)
    • Year and Date
      2016-10-30
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] PPM圧縮におけるブロック間バースト誤りに対応する訂正手法2016

    • Author(s)
      室井拓也, 北神 正人
    • Organizer
      電子情報通信学会ディペンダブルコンピューティング研究会
    • Place of Presentation
      彦根市(滋賀県)
    • Year and Date
      2016-10-27
    • Related Report
      2016 Annual Research Report
  • [Presentation] 位数の大きい整数剰余環を用いた単一Limited-Magnitude誤り訂正符号2016

    • Author(s)
      小滝翔平, 北神 正人
    • Organizer
      電子情報通信学会ディペンダブルコンピューティング研究会
    • Place of Presentation
      彦根市(滋賀県)
    • Year and Date
      2016-10-27
    • Related Report
      2016 Annual Research Report
  • [Presentation] The Effective Method of Improving Berlekamp-Preparata Convolutional Codes Decoding by Tail-Biting Technology2016

    • Author(s)
      Tianyi Zhang and Masato Kitakami
    • Organizer
      電子情報通信学会情報理論研究会
    • Place of Presentation
      電気通信大学
    • Year and Date
      2016-03-10
    • Related Report
      2015 Research-status Report
  • [Presentation] NANDフラッシュメモリのためのP/E サイクルを考慮した誤り訂正符号2015

    • Author(s)
      浅井万平 北神正人
    • Organizer
      電子情報通信学会ディペンダブルコンピューティング研究会
    • Place of Presentation
      クリエイト村上(新潟県村上市)
    • Year and Date
      2015-12-18
    • Related Report
      2015 Research-status Report
  • [Presentation] Codes Correcting Asymmetric/Unidirectional Errors along with Bidirectional Errors of Small Magnitude2014

    • Author(s)
      Syohei Kotaki and Masato Kitakami
    • Organizer
      Dependable Computing (PRDC), 2014 IEEE 20th Pacific Rim International Symposium on
    • Place of Presentation
      シンガポール(シンガポール)
    • Year and Date
      2014-11-18 – 2014-11-21
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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