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Reduced-nonlinear effect on magnetic recording channels using MMSE equalizer
Author(s)
Date Issued
January 1, 2015
Type
Article
Abstract
This paper considers the nonlinear effect on magnetic recording channels in order to reduce the system distortion. We propose the designed minimum-mean square error (MMSE) equalizer and targets for a high density perpendicular magnetic recording to combat the nonlinear transition shift (NLTS) in a channel characterized by jitter noise and additive white Gaussian noise (AWGN). Due to the complex nature of nonlinear effects, the nonlinearity of a read-back signal is modeled by the second order Volterra model consisting of linear and nonlinear parts. The bit-error rate (BER) of the nonlinear-affected system using the designed MMSE equalizer is significantly decreased. The results show that the proposed MMSE equalizer with gt=1 constraint can decrease the inter-symbol interference (ISI) that causes nonlinearity and also improves a system performance.
Citation
Ecti Transactions on Electrical Engineering Electronics and Communications, 13(1), 11-17, 2015