Improvement of Read Back Properties in HDD with PRML Signal Processing Method(<Special Issue>Recent Progress of High-Density Disk Storage)

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概要

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• A series of micromagnetic models including simulations of the 3D thin film write head field, the GMR read head, the thin film media and channel codes are utilized to study the recording performance in longitudinal hard disk drives (HDD) at extremely high densities. The (0, 4/4) encoder is utilized to translate the user data into (0, 4/4) constrained codes, before the write process is performed. The write current is achieved from the constrained code in the NRZ format. The read back voltage is reshaped to the PR-IV signal and the Viterbi detector is utilized to recover the data. In a medium of 10 nm grains, the recording linear density limits with the PRML method are about 1000 kfci, which is 1.5 times of those with the PD channel.

• 2003-09-01

著者

• Liang Xiaobing

  Laboratory Of Advanced Materials Department Of Materials Science And Engineering Tsinghua University

• WEI Dan

  Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua Universi

• Wei Dan

  Laboratory Of Advanced Materials Department Of Materials Science And Engineering Tsinghua University

関連論文

• Improvement of Read Back Properties in HDD with PRML Signal Processing Method(Recent Progress of High-Density Disk Storage)
• Medium Noise in Longitudinal Thin Film Disk Media above 20Gb/in^2(Special Issue on Selected Papers from the 4th Asian Symposium for Information Storage Technology)
• Thermodynamic Behavior of a Nano-Sized Magnetic Grain near the Superparamagnetic Limit(Recent Progress of High-Density Disk Storage)

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