TY - JOUR
T1 - System design for readback above 1 Tbit/In2 from granular media
AU - Victora, R. H.
AU - Wang, Yao
PY - 2014/3
Y1 - 2014/3
N2 - The performance of a rotated sense head is examined for densities of 2-7 Tbits/in2 recorded on granular media, such as that envisioned for 2-D magnetic recording. The key idea is that tightly placed shields are used to guarantee the resolution in the cross-track direction, and oversampled signal processing regains the lost resolution in the down-track direction. It also avoids the necessity for a complex 2-D detector and head array, or latency issues if a single head were employed in the normal orientation. Simulation shows that the new design achieves a density gain of 1.7X (single head) and 2.1X (head array) over a normally oriented single head at a target bit error rate (BER) of 10-3 with sampling period of 2 nm, minimum mean square error equalizer, and Viterbi detector. The new design shows greatly reduced BER relative to a normally oriented single head for all densities, including a very few grains per channel bit (<2).
AB - The performance of a rotated sense head is examined for densities of 2-7 Tbits/in2 recorded on granular media, such as that envisioned for 2-D magnetic recording. The key idea is that tightly placed shields are used to guarantee the resolution in the cross-track direction, and oversampled signal processing regains the lost resolution in the down-track direction. It also avoids the necessity for a complex 2-D detector and head array, or latency issues if a single head were employed in the normal orientation. Simulation shows that the new design achieves a density gain of 1.7X (single head) and 2.1X (head array) over a normally oriented single head at a target bit error rate (BER) of 10-3 with sampling period of 2 nm, minimum mean square error equalizer, and Viterbi detector. The new design shows greatly reduced BER relative to a normally oriented single head for all densities, including a very few grains per channel bit (<2).
KW - Granular media
KW - Magnetoresistive head
KW - Two-dimensional magnetic recording (TDMR)
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U2 - 10.1109/TMAG.2013.2284735
DO - 10.1109/TMAG.2013.2284735
M3 - Article
AN - SCOPUS:84897046832
SN - 0018-9464
VL - 50
SP - 31
EP - 36
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 3
M1 - 6774967
ER -