DocumentCode
861249
Title
Coding to improve SNR in magnetic recording
Author
Conway, T. ; Nelson, John
Author_Institution
Dept. of Electron. & Comput. Eng., Limerick Univ.
Volume
32
Issue
7
fYear
1996
fDate
3/28/1996 12:00:00 AM
Firstpage
621
Lastpage
622
Abstract
The magnetic recording channel is often equalised to the PR4 partial response. Viterbi detection is used to detect the recorded data, but suffers a loss owing to the effects of noise correlation. The use of coding on the PR4 magnetic recording channel to reduce the effects of noise correlation is proposed. This is shown to achieve a gain in effective SNR over an uncoded channel. Parity codes are shown to be one method of achieving this. The read data is decoded with a soft decision Viterbi detector. The performance of the method is verified through simulations
Keywords
Viterbi detection; digital magnetic recording; error detection codes; magnetic recording noise; partial response channels; PR4 partial response; SNR improvement; coding; magnetic recording channel; noise correlation; parity codes; soft decision Viterbi detector;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19960439
Filename
491857
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