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DFE timing acquisition: analysis and a new approach for fast acquisition

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4 Author(s)
Wang, J.J. ; Data Storage Inst., Singapore ; Bergmans, J.W.M. ; Yuan Xing Lee ; Mathew, G.

The problem of timing acquisition in decision feedback equalization (DFE) detectors for magnetic recording channels, in particular the multi-level DFE (MDFE), is considered. We first address the issue of the optimal choice of preamble pattern for timing acquisition and show that a 6T periodic pattern (T being the bit period) is optimum for medium to high user densities. Next, we show that the MDFE timing-error detector using the 6T-pattern is near optimum for acquisition. Finally, we propose a novel threshold-based fast acquisition scheme that can eliminate false lock and effectively prevent hang up problems

Published in:

Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )

Date of Publication:

Sep 2000

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