A novel IIR equalizer design for perpendicular recording systems with media jitter noise

Abstract

In this paper, a method of designing an infi nite impulse response (IIR) equalizer for turbo equalization
in the perpendicular magnetic recording channels will be designed and described. Based on a minimum meansquared
error (MMSE) approach, the coeffi cients of the IIR equalizer are explicitly derived. Then, we compare
its performance with a fi nite-impulse response (FIR) equalizer in the presence and absence of the media jitter
noise. Results indicate that for a small number of equalizer taps, the proposed IIR equalizer outperforms the FIR
equalizer at moderate to high jitter noise levels. Also if compared with an 11-tap FIR equalizer, the proposed IIR
counterpart can achieve a similar BER performance, but it requires a fewer number of equalizer taps.