DocumentCode
865159
Title
A (d , k , c )=(0, 3, 5/2) rate 8/10 modulation code
Author
Fredrickson, Lyle J.
Author_Institution
IBM Corp., San Jose, CA, USA
Volume
26
Issue
5
fYear
1990
fDate
9/1/1990 12:00:00 AM
Firstpage
2318
Lastpage
2320
Abstract
A DC-free modulation code with parameters (d , k c )=(0, 3, 5/2) is presented. A state-machine encoder converts 8-b blocks of user data to 10-b blocks of channel sequences in NRZI (nonreturn-to-zero invert) notation through state-dependent tables, which are decoded in 10-b blocks through a single table in a stateless, independent block fashion. The underlying constraint graph for the code is presented, and the extraction of practical 8/10 codes from the constraint graph is shown. Coding tables for a particular extraction are discussed, and the code is compared to similarly constrained modulation codes
Keywords
hard discs; magnetic recording; DC-free modulation code; nonreturn-to-zero invert; state-dependent tables; state-machine encoder; underlying constraint graph; Data mining; Decoding; Frequency; Magnetic modulators; Magnetic recording; Modulation coding; Saturation magnetization; Timing;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.104710
Filename
104710
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