Decoding Flash Memory with Progressive Reads and Independent vs. Joint Encoding of Bits in a Cell
Decoding Flash Memory with Progressive Reads and Independent vs. Joint Encoding of Bits in a Cell
复制标题
使用渐进式读取以及单元中位的独立与联合编码来解码闪存
DOI：
--
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
R. Wesel
中科院分区：
文献类型：
--
作者：
Nathan Wong;Ethan Liang;Haobo Wang;S. V. S. Ranganathan;R. Wesel
本文开发了一种模式，用于优化渐进式读取闪存单元，最大限度地提高了条件互信息（MI）以前的读取，并表明，一些渐进式读取提供更多的MI比别人。我们研究了两种闪存存储技术：1）将单元的每个位独立编码为单独的码字的常见做法，以及2）将单元中的所有位联合编码为相同的码字。我们量化了联合和独立编码之间的MI差距，并表明当渐进式读取可用时，这种差距可以忽略不计。本文提供了LDPC仿真，证实MI分析。
This paper develops a paradigm for optimizing progressive reads for flash memory cells that maximize the conditional mutual information (MI) given previous reads and shows that some progressive reads provide substantially more MI than others. We study two flash storage techniques: 1) the common practice of independently encoding each bit of a cell into a separate codeword and 2) jointly encoding all the bits in the cell into the same codeword. We quantify the MI gap between joint and independent encoding and show that this gap becomes negligible when progressive reads are available. The paper provides LDPC simulations that confirm the MI analysis.