Title :
An experimental MDFE detector
Author :
Hong, John ; Lee, Yuan Xing ; Mutoh, Hiroshi ; Sun, Qicheng ; Ueno, Hiroaki ; Wang, Jianjiang ; Wood, Roger
Author_Institution :
IBM Corp., San Jose, CA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
A 100 Mb/s experimental multilevel Decision Feedback Equalization read channel has been designed and prototyped in discrete-components. The analog forward equalizer consists of two bi-quads, based on the maximization of inner eye versus noise power plus uncancelled ISI at the input to the detector. The feedback equalizer consists of a 6-tap filter plus an RC exponential decay network which helps reduce hardware complexity. The digitally implemented timing/gain/dc-offset loops are adjusted only when there are transitions. Bench testing shows that the error rate performance is about 1.5 dB away from the theoretically designed performance at user density 2.0
Keywords :
decision feedback equalisers; hard discs; intersymbol interference; mixed analogue-digital integrated circuits; 100 Mbit/s; MDFE detector; RC exponential decay network; analog forward equalizer; bench testing; inner eye; multilevel decision feedback equalization read channel; six-tap filter; timing/gain/dc-offset loops; uncancelled ISI; user density; Decision feedback equalizers; Detectors; Equalizers; Error analysis; Feedback loop; Filters; Finite impulse response filter; Force feedback; Hardware; IIR filters; Intersymbol interference; Matched filters; Prototypes; Testing; Timing; Transfer functions;
Journal_Title :
Magnetics, IEEE Transactions on
