Title :
Improved trellis-coding for partial-response channels
Author :
Fredrickson, L. ; Karabed, R. ; Rae, J. ; Siegel, P. ; Thapar, H. ; Wood, R.
Author_Institution :
Div. of Storage Syst., IBM Corp., San Jose, CA, USA
fDate :
3/1/1995 12:00:00 AM
Abstract :
New code design methods and Viterbi detector architectures are presented for high-rate trellis-coded partial-response (TCPR) systems. The methods, which extend the matched-spectral-null (MSN) coding technique, use novel code constraints and time-varying detector trellis structures to reduce path memory requirements by as much as a factor of two, relative to previously reported codes, while retaining the other attractive features of MSN codes. The design methods and corresponding time-varying trellis structures are illustrated with several examples.<>
Keywords :
Viterbi detection; digital magnetic recording; partial response channels; time-varying channels; trellis codes; Viterbi detector architectures; code constraints; code design methods; digital magnetic recording; matched-spectral-null coding; partial-response channels; path memory requirements; time-varying detector trellis structures; trellis-coding; Decoding; Degradation; Design methodology; Detectors; Digital magnetic recording; Hardware; Magnetic analysis; Prototypes; Very large scale integration; Viterbi algorithm;
Journal_Title :
Magnetics, IEEE Transactions on
