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Detection and decoding algorithms for nanoscale data storage
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Parnell, Thomas P. (2010) Detection and decoding algorithms for nanoscale data storage. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk:80/record=b2580656~S1
Abstract
Scanning probe technology can be used for the modification of surfaces on the
nanoscale and therefore has potential applications for data storage: data can be
stored as a sequence of indentations in a polymer medium for example. In order
to achieve the throughput requirements of a modern storage device the proposed
probe storage systems consist of large arrays of probes reading/writing/erasing data
in parallel.
One of the most important tasks when designing a commercial storage device
is to ensure that data can always be retrieved with a very low probability of
error. The small scales offered by probe storage can potentially allow very high
areal densities of information storage (larger than 1Tbit/in2) but there is a price to
pay: many distortions arise when trying to retrieve this data (positioning errors for
example) that make it harder to determine the correct information originally stored
by the user.
This thesis is concerned with signal processing for probe storage. Firstly
channel models are developed for the read-back signal from a probe storage device
that take into account the various distortions that occur. These models are then
used for the design of probabilistic data detection algorithms and error-correcting
codes that ensure the probability of error associated with data retrieval is sufficiently
low. These intensively mathematical algorithms are designed with their complexity
in mind to ensure they allow an implementation that satisfies the silicon area, power
and timing constraints of a highly parallelized probe storage device.
Making use of the tools provided by such fields as information theory, probability
theory and asymptotic analysis the performance of these signal processing
algorithms is studied theoretically and fundamental limits concerning the performance
of a probe storage device are computed. The system-level implications of
these results are carefully considered.
Item Type: | Thesis (PhD) | ||||
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Subjects: | Q Science > QA Mathematics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Library of Congress Subject Headings (LCSH): | Computer storage devices -- Design and construction, Nanoelectronics -- Mathematical models, Signal processing -- Mathematical models | ||||
Official Date: | September 2010 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | Mathematics Institute | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Zaboronski, Oleg V. ; Pozidis, Charalampos | ||||
Sponsors: | Great Britain. Royal Commission for the Exhibition of 1851 | ||||
Extent: | xvi, 314 p. : ill., charts | ||||
Language: | eng |
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