NDLI: Optimal code rates for concatenated codes on a PR4-equalized magnetic recording channel

Content Provider	IEEE Xplore Digital Library
Author	Ryan, W.E.
Copyright Year	1965
Abstract	At some nominal recording density, the read signal in digital magnetic recording resembles a Class IV partial response (PR4) signal and, hence, may be equalized to the PR4 shape with relatively little noise enhancement. When coding is added, for a fixed user density, the recording density must increase as a result of coding overhead, and the read signal will resemble PR4 to a lesser extent. Equalization to PR4 in this case will produce excessive noise enhancement. Thus, coding overhead (or rate) must be selected for optimum tradeoff between code strength and noise enhancement. Toward this end, we provide results for high-rate concatenated codes, assuming a Lorentzian recording channel model. In addition to examining optimal code rates, we compare parallel and serial concatenated code performance on the PR4 channel.
Sponsorship	IEEE Magnetics Society
Starting Page	4044
Ending Page	4049
Page Count	6
File Size	146509
File Format	PDF
ISSN	00189464
Volume Number	36
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Concatenated codes Magnetic recording Noise shaping Pulse measurements Digital magnetic recording Magnetic noise Space vector pulse width modulation Shape Signal to noise ratio Magnetic heads
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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