When all information is not created equal
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2009
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| Online Access: | http://hdl.handle.net/1721.1/45883 |
| _version_ | 1826215859890159616 |
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| author | Borade, Shashibhushan Prataprao, 1981- |
| author2 | Lizhong Zheng. |
| author_facet | Lizhong Zheng. Borade, Shashibhushan Prataprao, 1981- |
| author_sort | Borade, Shashibhushan Prataprao, 1981- |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008. |
| first_indexed | 2024-09-23T16:38:11Z |
| format | Thesis |
| id | mit-1721.1/45883 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:38:11Z |
| publishDate | 2009 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/458832019-04-11T03:45:04Z When all information is not created equal Borade, Shashibhushan Prataprao, 1981- Lizhong Zheng. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008. Includes bibliographical references (p. 191-196). Following Shannon's landmark paper, the classical theoretical framework for communication is based on a simplifying assumption that all information is equally important, thus aiming to provide a uniform protection to all information. However, this homogeneous view of information is not suitable for a variety of modern-day communication scenarios such as wireless and sensor networks, video transmission, interactive systems, and control applications. For example, an emergency alarm from a sensor network needs more protection than other transmitted information. Similarly, the coarse resolution of an image needs better protection than its finer details. For such heterogeneous information, if providing a uniformly high protection level to all parts of the information is infeasible, it is desirable to provide different protection levels based on the importance of those parts. The main objective of this thesis is to extend classical information theory to address this heterogeneous nature of information. Many theoretical tools needed for this are fundamentally different from the conventional homogeneous setting. One key issue is that bits are no more a sufficient measure of information. We develop a general framework for understanding the fundamental limits of transmitting such information, calculate such fundamental limits, and provide optimal architectures for achieving these limits. Our analysis shows that even without sacrificing the data-rate from channel capacity, some crucial parts of information can be protected with exponential reliability. This research would challenge the notion that a set of homogenous bits should necessarily be viewed as a universal interface to the physical layer; this potentially impacts the design of network architectures. This thesis also develops two novel approaches for simplifying such difficult problems in information theory. Our formulations are based on ideas from graphical models and Euclidean geometry and provide canonical examples for network information theory. They provide fresh insights into previously intractable problems as well as generalize previous related results. by Shashibhushan Prataprao Borade. Ph.D. 2009-06-30T16:32:02Z 2009-06-30T16:32:02Z 2008 2008 Thesis http://hdl.handle.net/1721.1/45883 320241133 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 196 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Borade, Shashibhushan Prataprao, 1981- When all information is not created equal |
| title | When all information is not created equal |
| title_full | When all information is not created equal |
| title_fullStr | When all information is not created equal |
| title_full_unstemmed | When all information is not created equal |
| title_short | When all information is not created equal |
| title_sort | when all information is not created equal |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/45883 |
| work_keys_str_mv | AT boradeshashibhushanprataprao1981 whenallinformationisnotcreatedequal |