Abstract/Details

Modulation and detection for digital magnetic recording


1991 1991

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Abstract (summary)

In this dissertation, we apply the principles of communication theory to digital magnetic recording channels in order to achieve more reliable and higher density storage systems. In Chapter 1, we give an overview of existing signal processing techniques and show the relevance of this dissertation to these techniques. In Chapter 2, the computational cut-off rate of a (d, k) input constrained discrete memoryless channel is described. This cut-off rate is used to find the gain in signal-to-noise ratio that can be achieved by the use of soft decision information. In Chapter 3, feed-forward timing recovery for recording channels that use sampling detection techniques is proposed. The performance of these timing loops is investigated as a function of both the recording density and the input signal-to-noise ratio. This timing recovery technique was found to be attractive for high density recording channels. In Chapter 4, the design and performance of non-uniformly spaced tap-delay-line equalizers is described and it shown that this structure performs better than the existing tap-delay-line equalizer structures. In Chapter 5, the efficient performance evaluation of intersymbol interference channels in the presence of additive white Gaussian noise is described. An algorithm is introduced to compute the minimum Euclidean free distance of the intersymbol interference channel very efficiently. Finally, in Chapter 6, we summarize the results of each chapter and present directions for future research.

Indexing (details)


Subject
Electrical engineering
Classification
0544: Electrical engineering
Identifier / keyword
Applied sciences; equalization
Title
Modulation and detection for digital magnetic recording
Author
Raghavan, Sreenivasa A.
Number of pages
184
Publication year
1991
Degree date
1991
School code
0033
Source
DAI-B 52/05, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Wolf, Jack K.; Milstein, Laurence B.
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
9130762
ProQuest document ID
303951357
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/303951357/abstract
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