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Ideas for Detection in Two-Dimensional Magnetic Recording Systems

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3 Author(s)
Yao Wang ; Electr. & Comput. Eng. Dept., Univ. of Minnesota, Minneapolis, MN, USA ; Frohman, S. ; Victora, R.H.

In two-dimensional magnetic recording, detection for a perfect writer and perfect reader based on an iterative threshold technique are compared to detection employing single threshold and adaptive threshold techniques. The simulation indicates that the algorithm can reach a BER of 9.3% compared to 11.2% and 10.5% for the latter cases when the bit size is 8 by 8 nm with a grain of 8.7 nm diameter. This increases data capacity by 11% to 6.6 TBits/inch2. Additionally, detection with an array of three conventional heads has been studied: the simulation shows that for bits with dimension of 12 × 12 nm, grains of 8.7 nm diameter and reader width of 18 nm, the BER drops from 11.3% for a single conventional head to 5.4% for the head array with a two-dimensional generalized partial response equalizer at the optimum offset of 10 nm. The density is increased by 42%, reaching 4.0 Tbits/Inch2 .

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )