CIF: Small: Two-Dimensional Channel Modeling, Detection and Coding for Shingled Magnetic Recording

CIF：小型：叠瓦磁记录的二维通道建模、检测和编码

• 批准号: 1218452
• 负责人: J Cruz
• 金额: $ 41.86万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1218452&HistoricalAwards=false
• 关键词: CIF; Small; Two; Dimensional; Channel

Current magnetic recording technology is fast approaching its theoretical limit of 1 terabit per square inch (1 Tb/in^2), and unless new technology is developed that can deliver areal densities of up to 10Tb/in^2, the annual increases in hard-disk drive capacity will taper rapidly. Several candidate technologies are currently being developed that will extend the areal densities up to 4Tb/in^2, but only two that can possibly extend it all the way to 10Tb/in^2, namely energy assisted recording on bit-patterned media and two-dimensional magnetic recording. Bit-patterned media requires extreme nano-lithography and imprinting techniques, which are prohibitively expensive, and very tight specifications on the planarization of the disk surface. Two-dimensional magnetic recording, on the other hand, uses conventional heads and media, but requires the development of new two-dimensional signal processing and coding techniques suitable for the magnetic recording channel. This research program aims at providing an in-depth understanding of two-dimensional shingled magnetic recording through: 1) development of realistic channel models at the magnetic grain level; 2) development of techniques to analyze the statistical properties of such models; 3) development of two-dimensional intersymbol interference channel detectors with limited per-symbol complexity; 4) development of a novel and transformative approach to the design of capacity-approaching codes based on fundamental algebraic properties of cyclic codes; and 5) determination of the maximum areal recording density that can be achieved in practice. This research program will help answer the fundamental question of whether it is possible to approach the ultimate theoretical limit of one user bit per magnetic grain using shingled writing.The broader goal of this research program is to help determine the feasibility of hard-disk drives with areal densities of up to 10Tb/in^2 using shingled writing. Its successful completion would establish two-dimensional magnetic recording as the technology of choice for the next generation of magnetic storage devices and potentially shape future research in this field. The significance of achieving such a high recording density is that one could store up to ten times as much data on a drive of the same size as current ones, thus fostering a multi-billion dollar economic impact on the storage industry. In addition, the methods devised for detection and coding for channels with two-dimensional intersymbol interference have a wider application to new two-dimensional transmission and storage systems as they become available, for instance multi-aperture free-space optical communication systems and holographic data storage systems.

目前的磁记录技术正在快速接近其理论极限1 TB/in^2，除非开发出能够提供高达10 Tb/in^2的面密度的新技术，否则硬盘驱动器容量的年增长将迅速放缓。目前正在开发的几种候选技术可以将面密度扩展到4 Tb/in^2，但只有两种可能将其一直扩展到10 Tb/in^2，即位模式介质上的能量辅助记录和二维磁记录。位图案化的介质需要极端的纳米光刻和压印技术，这是非常昂贵的，并且对盘表面的平坦化有非常严格的要求。另一方面，二维磁记录使用传统的磁头和介质，但需要开发适合于磁记录通道的新的二维信号处理和编码技术。本研究计划的目的是提供一个深入的了解二维叠瓦磁记录通过：1）发展现实的信道模型在磁颗粒水平; 2）发展的技术，分析这种模型的统计特性; 3）发展二维码间干扰信道检测器与有限的每符号的复杂性; 4）基于循环码的基本代数性质，开发用于设计接近容量的码的新颖的和变革性的方法;以及5）确定在实践中可以实现的最大面记录密度。这项研究计划将有助于回答这样一个基本问题：使用叠瓦式写入是否有可能接近每个磁颗粒一个用户位的最终理论极限;这项研究计划更广泛的目标是帮助确定使用叠瓦式写入的面密度高达10 Tb/in^2的硬盘驱动器的可行性。它的成功完成将使二维磁记录成为下一代磁存储设备的首选技术，并可能塑造该领域的未来研究。实现如此高的记录密度的意义在于，在与当前驱动器相同大小的驱动器上可以存储多达十倍的数据，从而对存储行业产生数十亿美元的经济影响。此外，设计用于检测和编码具有二维符号间干扰的信道的方法在新的二维传输和存储系统变得可用时具有更广泛的应用，例如多孔径自由空间光通信系统和全息数据存储系统。