全息存储中的纠错码研究综述

A survey of error correction codes in holographic storage

大数据时代对于高密度大容量的存储技术需求与日俱增。与传统存储技术的按位记录方式不同,全息存储以二维数据页为读写单位,采用三维体存储模式,凭借存储密度高、数据转换速率快、节能安全以及超长期保存等优势,成为海量冷数据存储的有力竞争者。重点介绍了相位调制的同轴全息存储,分析了目前面向全息存储的纠错码研究现状,并详细介绍了一种参考光辅助的低密度奇偶校验LDPC码优化方案。

In the era of big data,the demand for high-density and large-capacity storage technology is increasing day by day.Unlike traditional storage technologies that record data bit by bit,holographic storage uses two-dimensional data pages as the unit for reading and writing,adopting a three-dimensional volume storage mode.With advantages such as high storage density,fast data conversion rate,energy efficiency,safety,and ultra-long-term preservation,holographic storage is expected to become the strong competitor for mass cold data storage.This paper focuses on phase-modulated collinear holographic storage and analyzes the current research status of error correction codes for holographic storage.A detailed introduction is provided to an reference beam-assisted low-density parity-check(LDPC)code scheme.