Title :
An adaptive equalizer for the partial response Class I channel used by DDS3
Author :
Hirasaka, H. ; Tanaka, A. ; Nomura, K. ; Fukuda, S.
Author_Institution :
Adv. Dev. Lab., Sony Corp., Tokyo, Japan
fDate :
9/1/1996 12:00:00 AM
Abstract :
A channel decoder IC for the DDS3 format has been developed. A digital PLL, an equalizer with a digital adaptive transversal filter, and a parallel Viterbi algorithm decoder were built into this IC. Minimizing the linear equalization error contributes to improving the detection signal-to-noise ratio. An adaptive equalizer with 22 taps was found to provide a good trade-off between performance and complexity. The detection error rate was reduced by approximately a factor of 10 by the adaptive equalizer
Keywords :
Viterbi decoding; adaptive equalisers; digital magnetic recording; partial response channels; DDS3; adaptive equalizer; channel decoder IC; digital PLL; digital adaptive transversal filter; linear equalization error; parallel Viterbi algorithm decoder; partial response Class I channel; signal-to-noise ratio; Adaptive equalizers; Analog integrated circuits; Digital integrated circuits; Envelope detectors; Least squares approximation; Maximum likelihood decoding; Phase locked loops; Signal processing algorithms; Transversal filters; Viterbi algorithm;
Journal_Title :
Magnetics, IEEE Transactions on
