DocumentCode
1257123
Title
On the Shannon capacity of DC- and Nyquist-free codes
Author
Frederickson, L.J.
Author_Institution
IBM Corp., San Jose, CA, USA
Volume
37
Issue
3
fYear
1991
fDate
5/1/1991 12:00:00 AM
Firstpage
918
Lastpage
923
Abstract
The design of codes which are simultaneously DC- and Nyquist-free is considered. The Shannon capacity of codes that are simultaneously DC- and Nyquist-free is tabulated as a function of the number of allowed running digital sum and alternating digital sum states. For this constraint, the set of possible rational capacities is shown to be (1/4,1/2,3/4). A rate 3/4 DC- and Nyquist-free code is used to demonstrate the ability to code at the highest rational capacity available.
Keywords
channel capacity; error correction codes; DC-free code; Nyquist-free codes; Shannon capacity; alternating digital sum; rational capacities; running digital sum; Analysis of variance; Binary codes; Books; Electrons; Frequency; Magnetic recording; Modulation coding; Pulse modulation; Strontium;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/18.79962
Filename
79962
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