A Study on Optimal BAR in Array Head Reading

T. Kondoh; Y. Nakamura; M. Nishikawa; H. Osawa; Y. Okamoto; Y. Kanai; H. Muraoka

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A Study on Optimal BAR in Array Head Reading

机译：阵列磁头读取中最佳BAR的研究

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Two-dimensional magnetic recording (TDMR), which combines shingled magnetic recording (SMR) with 2-D signal processing attracts attention from the hard disk drive industry. SMR is a magnetic recording system in order to increase the track density by writing tracks without the guard band. Therefore, the influences of writing and reading intertrack interferences (ITIs) deteriorate the quality of reproducing waveforms. Additionally, degradation of track due to overwriting and crosstalk from the adjacent tracks due to the width of reader sensitivity. The equalization using 2-D finite impulse response filter for the waveforms from three adjacent tracks is proposed as a method to reduce the influence of reading ITIs. In this paper, we evaluate the bit aspect ratio (BAR) in TDMR read/write channel under a specification of 4 Tb/in2 using bit error rate of the low-density parity-check (LDPC) coding and iterative decoding system obtained by computer simulation. The results show that the suitable BAR in array head reading is 2.0.

机译：二维磁记录（TDMR）结合了带磁化磁记录（SMR）和2-D信号处理功能，引起了硬盘驱动器行业的关注。 SMR是一种磁记录系统，旨在通过在没有保护带的情况下写入磁道来增加磁道密度。因此，写入和读取轨道间干扰（ITI）的影响会降低再现波形的质量。另外，由于读取器灵敏度的宽度而导致的重写和来自相邻轨道的串扰导致的轨道劣化。提出了使用二维有限脉冲响应滤波器对来自三个相邻磁道的波形进行均衡的方法，以减少读取ITI的影响。在本文中，我们使用低密度奇偶校验（LDPC）的误码率在4 Tb / in 2 的规格下评估TDMR读/写通道中的比特宽高比（BAR）通过计算机仿真获得的编码和迭代解码系统。结果表明，在阵列头读取中合适的BAR为2.0。

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《IEEE Transactions on Magnetics》 |2017年第11期|1-4|共4页
作者
T. Kondoh; Y. Nakamura; M. Nishikawa; H. Osawa; Y. Okamoto; Y. Kanai; H. Muraoka;
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正文语种 eng
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Bars; Finite impulse response filters; Magnetic heads; Iterative decoding; Signal to noise ratio; Magnetic recording;

机译：条形;有限脉冲响应滤波器;磁头;迭代解码;信噪比;磁记录;

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A Study on Optimal BAR in Array Head Reading

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