RIA: Development of a Low-Cost, Near-Optimal Detector for Magnetic Data Storage Systems

RIA：开发用于磁性数据存储系统的低成本、近乎最优的探测器

• 批准号: 9110568
• 负责人: Jaekyun Moon
• 金额: $ 6.98万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9110568&HistoricalAwards=false
• 关键词: RIA; Development; Low; Cost; Near

The use of advanced signal processing techniques is becoming increasingly important as a cost-effective means to achieve high storage density in data storage systems. The Principal Investigator's research on pragmatic sequence detection algorithms for magnetic data storage channels has resulted in the successful development of a computationally efficient detection algorithm, which achieves a near-optimum performance under modulation code constraints that are important in magnetic recording. In this project, the Principal Investigator addresses several important issues related to the application of the proposed detection algorithm to practical recording systems. These are the issues related to: 1) the inherent error propagation problem associated with the proposed detection scheme, 2) code and detector sensitivity against the types of disturbances often encountered in real magnetic recording channels, 3) different options available for hardware implementation, and 4) adaptive formulation of the algorithm and the development of an advanced timing recovery scheme necessary for time-varying channel environments. The goal of this project is to carefully examine these issues, determine favorable hardware design options under real time-varying channel environments and provide solutions whenever potential problems exist. Potential benefits and limitations of the proposed method in comparison with conventional approaches will be thoroughly understood. In addition to providing information that is directly related to hardware implementation, the results of the proposed research help us understand code and detector behaviors under different types of channel disturbances. This will provide a basis for pursuing the challenging problem of designing codes and detectors which are immune to a selected type of channel disturbance.

使用先进的信号处理技术作为在数据存储系统中实现高存储密度的经济有效的手段正变得越来越重要。首席研究员对磁数据存储通道的实用序列检测算法的研究导致了一种计算高效的检测算法的成功开发，该算法在调制码约束下实现了近乎最优的性能，这在磁记录中是重要的。在这个项目中，首席调查员解决了与建议的检测算法在实际记录系统中的应用有关的几个重要问题。这些问题涉及：1)与所提出的检测方案相关联的固有错误传播问题，2)针对实际磁记录通道中经常遇到的干扰类型的编码和检测器灵敏度，3)可用于硬件实现的不同选项，以及4)算法的自适应公式化和对时变通道环境所必需的高级定时恢复方案的开发。该项目的目标是仔细检查这些问题，在实时变化的信道环境下确定有利的硬件设计选项，并在存在潜在问题时提供解决方案。与传统方法相比，拟议方法的潜在好处和局限性将得到彻底理解。除了提供与硬件实现直接相关的信息外，所提出的研究结果还有助于我们理解在不同类型的信道干扰下的代码和检测器行为。这将为设计对所选类型的信道干扰免疫的代码和检测器这一具有挑战性的问题提供基础。