Two-Dimensional Pulse Response and Media Noise Modeling for Bit-Patterned Media
Two-Dimensional Pulse Response and Media Noise Modeling for Bit-Patterned Media
复制标题
位模式媒体的二维脉冲响应和媒体噪声建模
DOI：
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发表时间：
2008
影响因子：
2.1
通讯作者：
J. Bain
中科院分区：
文献类型：
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作者：
S. Nabavi;B. V. Vijaya Kumar;J. Bain
在高密度位图案化介质(BPM)中，位或磁岛非常接近，除了码间干扰(ISI)之外，还会导致显著的磁道间干扰(ITI)。此外，在BPM中，介质噪声的主要来源是磁岛位置的波动和磁岛大小的波动。位置波动既可以发生在沿轨道方向，也可以发生在跨轨道方向。尺寸波动对ISI和ITI都有影响。为了得到一个更真实的包含二维干扰和二维介质噪声影响的信道模型，我们开发了一种适用于BPM的二维脉冲响应模拟器。利用二维脉冲响应，我们对ITI和介质噪声进行了建模。仿真结果表明，要获得可接受的误码率，在1.5TB/in2的密度下，位置和大小的波动应小于比特周期的8%。
In high density bit-patterned media (BPM), bits or magnetic islands are very close leading to significant inter-track interference (ITI) in addition to inter-symbol interference (ISI). Also, in BPM, major sources of media noise are the fluctuations in the location of the magnetic islands and fluctuations in the sizes of the magnetic islands. The location fluctuations can happen in both along-the-track and in cross-track directions. The size fluctuations affect both ISI and ITI. In order to obtain a more realistic channel model that includes the 2-D interference and the 2-D impact of media noise, we have developed a 2-D pulse response simulator for BPM. Utilizing the 2-D pulse response, we model the ITI and the media noise. Simulation results show that to achieve an acceptable bit error rate (BER), the location and size fluctuations should be smaller than 8% of the bit period at a density of 1.5 Tb/in2 .