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Equalization techniques for high-density magnetic recording

机译：高密度磁记录的均衡技术

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The advent of digital computers spurred the development of magnetic tape and disk-drive storage systems capable of storing large amounts of digital information. Since the early development of such systems in the 1950s, we have experienced a phenomenal growth in the use of digital storage systems and an equally large increase in storage capacity and storage density. Over the past four decades, the major factor contributing to the large increases in storage density and capacity has been the continuous technological improvements in the design and development magnetic media and heads. As the storage densities increase, signal processing becomes an important tool in the reconstruction of the digital information in the readback process. We present a tutorial treatment of signal-processing techniques for combating intersymbol interference inherent in high-density digital magnetic recording systems. We focus primarily on magnetic disk systems. We observed that the optimum detector for the ISI-corrupted signal is a maximum-likelihood sequence detector (MLSD) that can be efficiently implemented by means of the Viterbi algorithm.
机译：数字计算机的出现刺激了能够存储大量数字信息的磁带和磁盘驱动器存储系统的发展。自从1950年代这种系统的早期开发以来，我们在数字存储系统的使用上经历了惊人的增长，并且存储容量和存储密度也有了同样的大幅度增长。在过去的四十年中，导致存储密度和容量大幅增加的主要因素是设计和开发磁介质和磁头的持续技术改进。随着存储密度的增加，信号处理成为回读过程中重建数字信息的重要工具。我们提供了一种信号处理技术的教程，用于应对高密度数字磁记录系统中固有的符号间干扰。我们主要关注磁盘系统。我们观察到，ISI损坏信号的最佳检测器是最大似然序列检测器（MLSD），可以通过维特比算法有效实现。

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