IEICE TRANSACTIONS on Electronics
Adaptive and Iterative ITI Canceller for Inter-Track Asynchronous Shingled Write Magnetic Recording
Summary :
An adaptive and iterative intertrack-interference (ITI) cancelling scheme is described for multi-track signal detection in inter-track asynchronous shingled write magnetic recording. There is write-clock frequency drift in asynchronous recording systems. Read-back signals obtained with a wide read head scanning narrow tracks thus suffer from not only intersymbol interference (ISI) but also time-variant ITI. To efficiently cope with static ISI and time-variant ITI, multi-track soft interference cancellers and two-dimensional partial-response filters are incorporated based on per-survivor processing into each trellis state defined in a one-dimensional/two-dimensional trellis-switching max-log-MAP detector. In addition, the computational complexity can be reduced based on channel interpolation and intermittent TDPR-filter control by allowing small degradation in signal detection. Computer simulation results in media-noise-dominant environments demonstrate that the proposed adaptive and iterative ITI canceller achieves bit error rates close to those obtained in a non-ITI case when the read-head off-track ratio is up to 50% in write-clock frequency difference of 0.02%.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E95-C No.1 pp.155-162
- Publication Date
- 2012/01/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E95.C.155
- Type of Manuscript
- PAPER
- Category
- Storage Technology
Authors
Keyword
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Masaaki FUJII, "Adaptive and Iterative ITI Canceller for Inter-Track Asynchronous Shingled Write Magnetic Recording" in IEICE TRANSACTIONS on Electronics,
vol. E95-C, no. 1, pp. 155-162, January 2012, doi: 10.1587/transele.E95.C.155.
Abstract: An adaptive and iterative intertrack-interference (ITI) cancelling scheme is described for multi-track signal detection in inter-track asynchronous shingled write magnetic recording. There is write-clock frequency drift in asynchronous recording systems. Read-back signals obtained with a wide read head scanning narrow tracks thus suffer from not only intersymbol interference (ISI) but also time-variant ITI. To efficiently cope with static ISI and time-variant ITI, multi-track soft interference cancellers and two-dimensional partial-response filters are incorporated based on per-survivor processing into each trellis state defined in a one-dimensional/two-dimensional trellis-switching max-log-MAP detector. In addition, the computational complexity can be reduced based on channel interpolation and intermittent TDPR-filter control by allowing small degradation in signal detection. Computer simulation results in media-noise-dominant environments demonstrate that the proposed adaptive and iterative ITI canceller achieves bit error rates close to those obtained in a non-ITI case when the read-head off-track ratio is up to 50% in write-clock frequency difference of 0.02%.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E95.C.155/_p
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@ARTICLE{e95-c_1_155,
author={Masaaki FUJII, },
journal={IEICE TRANSACTIONS on Electronics},
title={Adaptive and Iterative ITI Canceller for Inter-Track Asynchronous Shingled Write Magnetic Recording},
year={2012},
volume={E95-C},
number={1},
pages={155-162},
abstract={An adaptive and iterative intertrack-interference (ITI) cancelling scheme is described for multi-track signal detection in inter-track asynchronous shingled write magnetic recording. There is write-clock frequency drift in asynchronous recording systems. Read-back signals obtained with a wide read head scanning narrow tracks thus suffer from not only intersymbol interference (ISI) but also time-variant ITI. To efficiently cope with static ISI and time-variant ITI, multi-track soft interference cancellers and two-dimensional partial-response filters are incorporated based on per-survivor processing into each trellis state defined in a one-dimensional/two-dimensional trellis-switching max-log-MAP detector. In addition, the computational complexity can be reduced based on channel interpolation and intermittent TDPR-filter control by allowing small degradation in signal detection. Computer simulation results in media-noise-dominant environments demonstrate that the proposed adaptive and iterative ITI canceller achieves bit error rates close to those obtained in a non-ITI case when the read-head off-track ratio is up to 50% in write-clock frequency difference of 0.02%.},
keywords={},
doi={10.1587/transele.E95.C.155},
ISSN={1745-1353},
month={January},}
Copy
TY - JOUR
TI - Adaptive and Iterative ITI Canceller for Inter-Track Asynchronous Shingled Write Magnetic Recording
T2 - IEICE TRANSACTIONS on Electronics
SP - 155
EP - 162
AU - Masaaki FUJII
PY - 2012
DO - 10.1587/transele.E95.C.155
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E95-C
IS - 1
JA - IEICE TRANSACTIONS on Electronics
Y1 - January 2012
AB - An adaptive and iterative intertrack-interference (ITI) cancelling scheme is described for multi-track signal detection in inter-track asynchronous shingled write magnetic recording. There is write-clock frequency drift in asynchronous recording systems. Read-back signals obtained with a wide read head scanning narrow tracks thus suffer from not only intersymbol interference (ISI) but also time-variant ITI. To efficiently cope with static ISI and time-variant ITI, multi-track soft interference cancellers and two-dimensional partial-response filters are incorporated based on per-survivor processing into each trellis state defined in a one-dimensional/two-dimensional trellis-switching max-log-MAP detector. In addition, the computational complexity can be reduced based on channel interpolation and intermittent TDPR-filter control by allowing small degradation in signal detection. Computer simulation results in media-noise-dominant environments demonstrate that the proposed adaptive and iterative ITI canceller achieves bit error rates close to those obtained in a non-ITI case when the read-head off-track ratio is up to 50% in write-clock frequency difference of 0.02%.
ER -
English
