DocumentCode
1480572
Title
Five runlength-limited codes for M-ary recording channels
Author
McLaughlin, Steven W.
Author_Institution
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Volume
33
Issue
3
fYear
1997
fDate
5/1/1997 12:00:00 AM
Firstpage
2442
Lastpage
2450
Abstract
This paper is concerned with M-ary runlength-limited (RLL) codes for nonbinary recording channels. The codes have fixed-rate finite state encoders, sliding block decoders, and large coding density. Five codes are given achieving coding densities of 24 bit/minimum-recorded-mark as compared with 1-1.5 for binary recording channels. The codes are 93-98.5% efficient and either achieve or come close to achieving the fewest number of encoder states possible. One of these codes has been implemented in a prototype system that supports M=6 discrete recording levels
Keywords
digital magnetic recording; runlength codes; 93 to 98.5 percent; M-ary runlength-limited code; coding density; constrained code; digital recording; finite state encoder; nonbinary recording channel; sliding block decoder; Decoding; Disk recording; Magnetic recording; Modulation coding; Optical recording; Optical saturation; Optical sensors; Prototypes; Saturation magnetization; Timing;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.573871
Filename
573871
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