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Two-Track Reading With a Wide-Track Reader for Shingled Track Recording

机译:使用宽轨阅读器进行两轨阅读,以进行分层的轨录音

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摘要

In order to avoid the requirement for a narrow track reader in high track density shingled recording, decoding schemes for two-track simultaneous reading, which allows a wide-track reader to be used, are investigated. The strong intertrack interference (ITI) is a major difficulty to be overcome. To avoid ITI, the recorded magnetization in the two tracks should be staggered. Two possible 2-D decoding techniques are provided: 1) recursive decoding by oversampling and 2) Partial Response Maximum Likelihood (PRML) detection. Because data in two track are read simultaneously, the data transfer rate is two times higher than in regular single-track reading. Despite the high data rate, the requirement on the reader for high readback resolution, such as a small shield gap length, magnetic spacing, can be mitigated.
机译:为了避免在高轨道密度带状记录中需要窄轨道读取器,研究了用于双轨道同时读取的解码方案,该方案允许使用宽轨道读取器。强烈的轨道间干扰(ITI)是需要克服的主要困难。为了避免ITI,应将两条磁道中记录的磁化强度错开。提供了两种可能的2-D解码技术:1)通过过采样进行递归解码,以及2)部分响应最大似然(PRML)检测。由于同时读取两个磁道中的数据,因此数据传输速率是常规单磁道读取中的两倍。尽管数据速率很高,但可以缓解读取器对高读取分辨率的要求,例如较小的屏蔽间隙长度,磁间距。

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