Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:F7
Session:
Number:F7-4
An MMSE Infinite Impulse Response Equalizer for Perpendicular Recording Channels with Jittter Noise
Piya Kovintavewat, Chanon Warisarn, Pornchai Supnithi,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
A finite impulse response (FIR) equalizer is practically employed in conjunction with the Viterbi detector for data detection process in magnetic recording channels. However, the FIR equalizer with a large number of taps is required at high density storage channels. It is well-known that an infinite impulse response (IIR) filter with a small number of taps can closely approximate such an FIR filter. In this paper, we propose the IIR filter for perpendicular recording channels, based on a minimum mean-squared error approach, and compare its performance with the FIR equalizer in the presence and in the absence of media jitter noise. Results indicate that the IIR equalizer performs better than the FIR equalizer for all jitter noise levels, especially when the number of equalizer taps is small (e.g., 3 taps) and the normalized recording density is high.