Robust Modulation of PWM-Based Multi-Level Perpendicular Magnetic Recording for Conventional Media
Robust Modulation of PWM-Based Multi-Level Perpendicular Magnetic Recording for Conventional Media
复制标题
基于 PWM 的传统介质多级垂直磁记录的鲁棒调制
DOI：
10.1109/lcomm.2018.2806960
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Mikhail Amelyushkin
中科院分区：
文献类型：
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作者：
K. Harada;Nobuhiro Maeto;Akihiro Yamazaki;Mikhail Amelyushkin
在这封信中，我们提出了一种基于脉冲宽度调制（PWM）的多级垂直磁记录的鲁棒3-ary调制。在本文提出的三进制调制中，窄宽脉冲被抑制在与磁介质分辨率相对应的PWM信号中。在我们的建议中，我们使用低密度奇偶校验（LDPC）编码帧错误率性能来评估用户比特密度（UBD）增益。在评估中，低分辨率介质被假定为读/写（R/W）通道。仿真结果表明，在低分辨率介质中，与传统的二进制R/W系统相比，所提出的调制具有鲁棒的UBD增益。此外，我们提出的在GF（128）上使用非二进制LDPC码的7B6T调制比实际二进制系统的密度增益超过6%。
In this letter, we propose a robust 3-ary modulation for a pulse width modulation (PWM)-based multi-level perpendicular magnetic recording. In the proposed 3-ary modulation, narrow-width pulses are restrained in PWM signal corresponding to resolution of magnetic media. We evaluate a user bit density (UBD) gain in our proposal using a low-density parity-check (LDPC) coded frame error rate performance. A low-resolution media is assumed as read/write (R/W) channel in the evaluation. Our simulation results show the proposed modulation has robust UBD gain compared with the conventional binary R/W systems in the low-resolution media. In addition, our proposed 7B6T modulation with non-binary LDPC codes over GF(128) has more than 6% density gain from the practical binary systems.