NDLI: A measurement-based characterization of the time variation of an indoor wireless channel

Content Provider	IEEE Xplore Digital Library
Author	Truman, T.E. Brodersen, R.W.
Copyright Year	1997
Description	Author affiliation: California Univ., Berkeley, CA, USA (Truman, T.E.)
Abstract	To provide mobile users with multimedia information services via a wireless link, the physical, link, and network protocol layers must be able to adapt to changing quality over the wireless channel. Since feedback used to drive adaptive algorithms introduces additional complexity and system overhead, the rate at which the feedback loop operates must be balanced against the penalty for adapting too slowly. This requires the system designer to have an understanding of the timescales at which these adaptive algorithms execute, and hence an understanding of the dynamic behavior of the wireless channel. Previous efforts on characterizing this behavior have focused primarily on determining the impulse response as a function of location. This work differs in that (1) the primary focus is on characterizing the rate of change in the channel response, and (2) the measurements are performed in-vivo, using an appropriately-sized device (a notebook-sized portable terminal) to gather measurements of the frequency response in the 2.4-2.5 GHz band. For a single, moving user in an indoor office environment, it is found that signal-strength deviations of less than 9 dB can be adequately tracked with a 2 Hz update frequency, and that increasing the update frequency to 20 Hz allows tracking changes to within 3 dB.
Starting Page	25
Ending Page	32
File Size	1678252
Page Count	8
File Format	PDF
ISBN	0780337778
ISSN	10918442
DOI	10.1109/ICUPC.1997.625468
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time measurement Dynamic scheduling Frequency measurement Adaptive algorithm Size measurement Delay Wireless application protocol Feedback loop Algorithm design and analysis Performance evaluation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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