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2010

Analysis of Nonlinear Transition Shift and Write Precompensation in Perpendicular Recording Systems

8 years 5 months ago
Analysis of Nonlinear Transition Shift and Write Precompensation in Perpendicular Recording Systems
Abstract—In high density perpendicular magnetic recording channels, nonlinear transition shift (NLTS) is one of the distortions that can degrade the system performance. Write precompensation is a standard method used to combat the negative effect of NLTS. In this paper, we present an analysis of the bit-error-rate (BER) for perpendicular recording systems with NLTS and write precompensation. Media jitter noise and additive white Gaussian noise are also considered in the model. A BER lower bound is derived, as well as a more easily computed estimate of the bound. The write precompensation values that numerically minimize the estimate of the BER lower bound prove to be very close to those found using Monte-Carlo channel simulation. We then apply these methods to the design of multilevel precompensation schemes, for which the optimization of precompensation values by Monte-Carlo channel simulation is computationally infeasible. The results show that for higher recording densities subjec...
Zheng Wu, Paul H. Siegel, Jack K. Wolf, H. Neal Be
Added 29 Jan 2011
Updated 29 Jan 2011
Type Journal
Year 2010
Where JSAC
Authors Zheng Wu, Paul H. Siegel, Jack K. Wolf, H. Neal Bertram
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