TY - JOUR
T1 - Asynchronous Multitrack Detection with a Generalized Partial-Response Maximum-Likelihood Strategy
AU - Banan Sadeghian, Elnaz
AU - Barry, John R.
N1 - Publisher Copyright:
© 1972-2012 IEEE.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - The industry standard for single-track detection in magnetic recording is partial-response equalization followed by a trellis-based sequence detector. We extend for the first time the partial-response paradigm to the case of multitrack detection when the multiple tracks being jointly detected were written asynchronously, with different bit phases and bit rates. We propose a multiple-input multiple-output (MIMO) partial-response equalizer that equalizes the unsynchronized samples of the multiple readback waveforms to a time-varying MIMO target, thereby enabling a trellis-based rotating-target (ROTAR) detector that accounts for the asynchrony. We evaluate the proposed equalization strategy on a two-dimensional magnetic-recording channel, and find that the proposed receiver outperforms a conventional receiver that detects one track at a time, by a 30% reduction in the bit-error rate, and that it closely matches the performance of a fictitious system in which the tracks are perfectly synchronous.
AB - The industry standard for single-track detection in magnetic recording is partial-response equalization followed by a trellis-based sequence detector. We extend for the first time the partial-response paradigm to the case of multitrack detection when the multiple tracks being jointly detected were written asynchronously, with different bit phases and bit rates. We propose a multiple-input multiple-output (MIMO) partial-response equalizer that equalizes the unsynchronized samples of the multiple readback waveforms to a time-varying MIMO target, thereby enabling a trellis-based rotating-target (ROTAR) detector that accounts for the asynchrony. We evaluate the proposed equalization strategy on a two-dimensional magnetic-recording channel, and find that the proposed receiver outperforms a conventional receiver that detects one track at a time, by a 30% reduction in the bit-error rate, and that it closely matches the performance of a fictitious system in which the tracks are perfectly synchronous.
KW - Timing recovery
KW - crosstalk interference
KW - joint multiuser detection
KW - multiple-input multiple-output (MIMO) channel
KW - two-dimensional magnetic recording (TDMR)
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U2 - 10.1109/TCOMM.2021.3135864
DO - 10.1109/TCOMM.2021.3135864
M3 - Article
AN - SCOPUS:85121787245
SN - 0090-6778
VL - 70
SP - 1595
EP - 1605
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 3
ER -