Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2004.843309
Title: Detection techniques for high-density magnetic recording
Authors: Sun, H.
Mathew, G. 
Farhang-Boroujeny, B.
Keywords: Channel nonlinearities
Magnetic recording
Media noise
PR target design
Signal-dependent distortions
Viterbi detection
Issue Date: Mar-2005
Source: Sun, H., Mathew, G., Farhang-Boroujeny, B. (2005-03). Detection techniques for high-density magnetic recording. IEEE Transactions on Magnetics 41 (3) : 1193-1199. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2004.843309
Abstract: In this paper, we present techniques for improving the performance of Viterbi detector in the presence of channel nonlinearities and media noise, which are the dominant source of errors in high density magnetic recording channels. Instead of treating these distortions separately, we combine them into a "high-density (HD) noise," which is signal dependent and correlated in nature. To compensate for signal-dependent mean and correlation of HD noise, we modify the branch metrics by subtracting an estimate of the mean from the signals on each branch and optimize the equalization target by minimizing the dominant error event probability, respectively. Simulation results show that these modifications yield significant performance gains. © 2005 IEEE.
Source Title: IEEE Transactions on Magnetics
URI: http://scholarbank.nus.edu.sg/handle/10635/55599
ISSN: 00189464
DOI: 10.1109/TMAG.2004.843309
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