NDLI: Optimality of expectation propagation based distributed estimation for wireless sensor network initialization

Content Provider	IEEE Xplore Digital Library
Author	MacLaren Walsh, J. Ramanan, S. Regalia, P.A.
Copyright Year	2008
Description	Author affiliation: Dept. of Elec. & Comp. Eng., Drexel Univ., Philadelphia, PA (MacLaren Walsh, J.; Ramanan, S.) \|\| Dept. of Elec. Eng & Comp. Sci., Catholic Univ. of America, Washington, DC (Regalia, P.A.)
Abstract	We establish that expectation propagation (EP), under some mild requirements and when properly organized, provides sensors with optimal Bayes estimators during the initialization phase of a large randomly deployed wireless sensor network, regardless of the cost function chosen. We are considering the initialization phase to be the period during which the sensors do not yet know their locations and channel/interference strengths, and thus must use random sleep schedules until they have estimated them. During this initialization phase, any other scheme for distributed Bayesian estimation utilizing communication among the same nodes must have equal or worse performance to EP. We discuss the sub-optimality of some other proposed schemes for distributed estimation in sensor networks: consensus propagation and distributed adaptive filtering, arguing that these techniques may presently be seen as seeking suboptimal performance among particular cost functions and with a goal of reduced computation and complexity relative to EP.
Starting Page	620
Ending Page	624
File Size	46716276
Page Count	5
File Format	PDF
ISBN	9781424420452
DOI	10.1109/SPAWC.2008.4641682
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-06
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel estimation Sleep Wireless sensor networks Training Estimation Gain Cost function
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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