NDLI: On the power efficiency of sensory and ad-hoc wireless networks

Content Provider	IEEE Xplore Digital Library
Author	Hassim, B. Dana, A.F.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA (Hassim, B.; Dana, A.F.)
Abstract	We consider the power efficiency of a communications channel, i.e., the maximum bit rate that can be achieved per unit power (energy rate). For AWGN channels, it is well known that power efficiency is attained in the low SNR regime where capacity is proportional to the transmit power. In this paper we show that for a sensory wireless network with n nodes, or for an ad-hoc wireless network with n users and up to /spl radic/n transmit/receive pairs, the power efficiency scales at least by a factor of /spl radic/n. In other words, each user in a wireless channel with n nodes can support the same communications rate as a single user system, but by expending only 1/(/spl radic/n) the energy. We also give a description of how to achieve these gains.
Starting Page	1533
Ending Page	1537
File Size	316911
Page Count	5
File Format	PDF
ISBN	0780375769
ISSN	10586393
DOI	10.1109/ACSSC.2002.1197035
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless sensor networks Ad hoc networks Wireless personal area networks AWGN channels Signal to noise ratio Relays Power system modeling Bit rate Communication channels Additive white noise
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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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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