Dynamically shifting thresholds for ternary PRS channel decoders

Unbounded state metric growth is a common concern in the hardware implementation of Viterbi decoders in both digital and analog domains. A promising alternative to state metric scaling is the use of the difference metric algorithm, which in the analog domain, has not been extended beyond Viterbi dec...

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Bibliographic Details
Published inProceedings of the 44th IEEE 2001 Midwest Symposium on Circuits and Systems. MWSCAS 2001 (Cat. No.01CH37257) Vol. 1; pp. 91 - 94 vol.1
Main Authors Omole, I.A., Maundy, B.J., Sesay, A.B.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2001
Subjects
Decoding
Delay
Digital communication
Digital recording
Hardware
Magnetic recording
Partial response signaling
Polynomials
Viterbi algorithm
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Summary:Unbounded state metric growth is a common concern in the hardware implementation of Viterbi decoders in both digital and analog domains. A promising alternative to state metric scaling is the use of the difference metric algorithm, which in the analog domain, has not been extended beyond Viterbi decoders for binary systems involving two states. Dynamically shifting thresholds with relatively simple updates for ternary duobinary and dicode Partial-Response Signaling (PRS) channel decoders based on the difference metric algorithm are proposed.
ISBN:078037150X
9780780371507
DOI:10.1109/MWSCAS.2001.986122