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Position Modulation Code for Rewriting Write-Once Memories

机译:用于重写一次性写入内存的位置调制代码

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摘要

A write-once memory (wom) is a storage medium formed by a number of “write-once” bit positions (wits), where each wit initially is in a “0” state and can be changed to a “1” state irreversibly. Examples of write-once memories include SLC flash memories and optical disks. This paper presents a low complexity coding scheme for rewriting such write-once memories, which is applicable to general problem configurations. The proposed scheme is called the position modulation code, as it uses the positions of the zero symbols to encode some information. The proposed technique can achieve code rates higher than state-of-the-art practical solutions for some configurations. For instance, there is a position modulation code that can write 56 bits 10 times on 278 wits, achieving rate 2.01. In addition, the position modulation code is shown to achieve a rate at least half of the optimal rate.
机译:一次写入存储器(wom)是由多个“一次写入”位位置(wits)形成的存储介质,其中每个wit最初处于“ 0”状态,并且可以不可逆地更改为“ 1”状态。一次写入存储器的示例包括SLC闪存和光盘。本文提出了一种用于重写此类一次写入存储器的低复杂度编码方案,该方案适用于一般问题配置。所提出的方案称为位置调制码,因为它使用零符号的位置来编码某些信息。对于某些配置,所提出的技术可以实现比最新的实际解决方案更高的代码速率。例如,有一个位置调制码可以在278个智慧上写入10次56位,达到2.01的速率。另外,位置调制码被示出为达到至少最佳速率的一半的速率。

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