Region-dependent, algorithmically directed thresholds for maximum-likelihood detection of ternary PRS channels

This paper presents mathematical derivations for a type of maximum-likelihood sequence detector (MLSD), for decoding signals equalized to the ternary partial response fundamental polynomials - duobinary (1+D) and dicode (1-D); or part of decoders for higher-order class of partial response polynomial...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 2002-12, Vol.49 (12), p.775-783
Main Authors: Omole, I.A., Maundy, B.J., Sesay, A.B.
Format: Article
Language:English
Subjects:
Delay
Detectors
Digital communication
Hardware
Magnetic recording
Maximum likelihood decoding
Maximum likelihood detection
Partial response signaling
Polynomials
Viterbi algorithm
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Summary:This paper presents mathematical derivations for a type of maximum-likelihood sequence detector (MLSD), for decoding signals equalized to the ternary partial response fundamental polynomials - duobinary (1+D) and dicode (1-D); or part of decoders for higher-order class of partial response polynomials. Region-dependent but algorithmically directed thresholds with relatively simple updates for ternary duobinary (1+D) and dicode (1-D) channel decoders are hereby presented which depend only on state metric differences. The simplicity of the threshold updates makes the new proposition very attractive for hardware implementation. Derivations for a ternary duobinary and dicode partial-response signaling (PRS) channel decoder based on the true difference metric algorithm are included.
ISSN:1057-7130
1558-125X
DOI:10.1109/TCSII.2002.807264