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首页> 外文期刊>Magnetics, IEEE Transactions on >2-D Write/Read Channel Model for Bit-Patterned Media Recording With Large Media Noise
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2-D Write/Read Channel Model for Bit-Patterned Media Recording With Large Media Noise

机译：用于具有大媒体噪声的位模式媒体录制的二维写入/读取通道模型

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摘要

A 2-D write/read channel model, which can accurately capture the media, writer, and reader characteristics, is proposed and investigated for very-high-density bit-patterned media recording (BPMR) system with large media noise. For the write process, a 2-D data-dependent write channel combined with a micromagnetic model of the writer is investigated for BPMR. In order to better understand the proposed channel model, several 2-D patterns are investigated, and the corresponding write failure events are studied. It is observed that the write error rates (WERs) are different for different 2-D patterns due to the 2-D data-dependent nature of the write-in errors, even though the write failure rates are the same for these different 2-D patterns. For the readback process, a read channel, including media noise, is combined with the write channel, and the bit error rates (BERs) are studied for various 2-D patterns as a function of media jitter and write clock phase drift. It is observed that the 2-D pattern corresponding to four identical bits in a square pattern provides the best performance at a target BER of , because it can provide adequate tolerance to media noise and interference in down-track and cross-track (CT) directions. The difference between the WER and the BER after readback is studied for various 2-D patterns, and the pattern corresponding to 4 bits with transitions in the CT direction is found to exhibit the largest difference among the studied patterns due to the fact that inter-track interference is more severe than the inter-symbol interference. These results motivate possible inclusion of 2-D modulation codes in BPMR channel to avoid certain bit patterns.
机译：针对具有大媒体噪声的超高密度位模式媒体录制（BPMR）系统，提出并研究了一种可以精确捕获媒体，作家和读者特征的二维写/读通道模型。对于写入过程，针对BPMR，研究了与二维数据相关的写入通道并结合了写入器的微磁模型。为了更好地理解所提出的通道模型，研究了几种二维模式，并研究了相应的写入失败事件。可以观察到，由于2-D数据依赖于写入错误的性质，不同的2-D模式的写入错误率（WER）是不同的，即使这些不同的2- D模式。对于回读过程，将包括媒体噪声的读取通道与写入通道进行组合，并针对各种2-D模式研究作为媒体抖动和写入时钟相位漂移的函数的误码率（BER）。可以观察到，与方形模式中四个相同位相对应的2-D模式在的目标BER为时可提供最佳性能，因为它可以对介质噪声和下轨和跨轨（CT）干扰提供足够的容限。指示。对于各种二维模式，研究了回读后WER和BER之间的差异，并且由于以下事实，发现与CT方向上具有跃迁的4位相对应的模式表现出最大的差异：轨道干扰比符号间干扰更为严重。这些结果促使可能在BPMR通道中包含2D调制码，从而避免某些位模式。

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