Title :
Trellis codes for (1,k) E2PR4ML with squared distance 18
Author :
McEwen, Peter A. ; Wolf, Jack K.
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
Finite truncation depth codes are obtained using periodically pruned module N trelises. One approach uses a runlength limited (d,k)=(1,7) code with rate R=2/3 as the underlying code. Another approach which results in a lower complexity detector trellis uses a rate R=3/5 sliding-block code that prohibits NRZI “10001” and adheres to a (d,k)=(1,8) constraint. The design of the module N trellis is described, and sufficient conditions for finite truncation depth are developed and applied to obtain several codes
Keywords :
block codes; maximum likelihood detection; partial response channels; runlength codes; trellis codes; (1,k) E2PR4ML; finite truncation depth; module N trellis; runlength limited code; sliding-block code; squared distance; trellis code; Convolutional codes; Euclidean distance; Event detection; Gas detectors; Optical signal processing; Tail;
Journal_Title :
Magnetics, IEEE Transactions on
