Abstract/Details

Signal processing and channel modeling for magnetic recording


1992 1992

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Abstract (summary)

The proper application of communication theory to magnetic recording channels requires good channel models. Recording channels share some common features with other communication channels, but also exhibit some peculiar behaviors. In this dissertation, a subset of these peculiarities are examined in order to address several issues including: the cause and effect, avoidance (when desirable) through system parameter selection, and signal processing implications of the phenomena.

An introduction to magnetic recording and communication channels is given in Chapter 1. Chapter 2 discusses the optimal detection of a disk pulse with nonstationary transition noise. The optimal detector is derived, and a technique for finding a better linear correlator detector than the matched filter is given. Chapter 3 is an experimental investigation of nonlinear effects in high density tape recording. The transition shape is found to depend on the location of the previous transition. In Chapter 4, a simple statistical model of the partial erasure effect in thin film longitudinal recording is introduced. This phenomenon is shown to be a consequence of the "zigzag" transition shape. An experimental investigation of the nonlinear amplitude loss associated with partial erasure is presented in Chapter 5. The discussion in Chapter 6 focuses on using the results of the previous three chapters to model high density recording channels. Model limitations and maximum likelihood sequence detection are discussed. Finally, Chapter 7 presents a brief summary of the dissertation.

Indexing (details)


Subject
Electrical engineering
Classification
0544: Electrical engineering
Identifier / keyword
Applied sciences
Title
Signal processing and channel modeling for magnetic recording
Author
Barndt, Richard David
Number of pages
219
Publication year
1992
Degree date
1992
School code
0033
Source
DAI-B 53/09, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Wolf, Jack Keil
University/institution
University of California, San Diego
University location
United States -- California
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
9303234
ProQuest document ID
304010367
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304010367/abstract
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