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Since maximum likelihood sequence detection in channels with media noise requires too many trellis states, it is advantageous to seek simpler detectors. This paper formulates the signal-dependent decision feedback equalizer (SD-DFE) for these channels. For the purpose of designing the feedforward equalizer, the channel is treated as linear and the noise as stationary. These assumptions guide the design of the minimum-mean-square-error feedforward equalizer. The feedback structure is derived using the autoregressive signal/noise model. In 90% jitter noise dominated channels, the SD-DFE performs as well as a 16-state signal-dependent Viterbi detector, at a fraction of the complexity. A drawback of this method is error propagation due to the feedback
Published in:
Magnetics, IEEE Transactions on
(Volume:37
,
Issue:
4
)
Date of Publication: Jul 2001
- Page(s):
- 1909 - 1911
- ISSN :
- 0018-9464
- INSPEC Accession Number:
- 7065430
- Digital Object Identifier :
- 10.1109/20.951005
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 August 2002
- Issue Date :
- Jul 2001
- Sponsored by :
- IEEE Magnetics Society
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