NDLI: Is broadcast plus multiaccess optimal for Gaussian wireless networks?

Content Provider	IEEE Xplore Digital Library
Author	Dana, A.F. Sharif, M. Gowaikar, R. Hassibi, B. Effros, M.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA (Dana, A.F.; Sharif, M.; Gowaikar, R.; Hassibi, B.; Effros, M.)
Abstract	In this paper we show that "separation"-based approaches in wireless networks do not necessarily give good performance in terms of the capacity of the network. Therefore in optimal design of a wireless network, its total structure should be considered. In other words, achieving capacity on the subnetworks of a wireless network does not guarantee globally achieving capacity. We will illustrate this fact by considering some examples of multistage Gaussian wireless relay networks. We will consider a wireless Gaussian relay network with one stage in both fading and nonfading environment. We show that as the number of relay nodes, n, grows large, the capacity of this network scales like log n. We then show that with the "separation"-based scheme, in which the network is viewed as the concatenation of a broadcast and a multiaccess network, the achievable rate scales as log log n and as a constant for fading and nonfading environment, respectively, which is clearly suboptimal.
Starting Page	1748
Ending Page	1752
File Size	382025
Page Count	5
File Format	PDF
ISBN	0780381041
DOI	10.1109/ACSSC.2003.1292284
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-11-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Broadcasting Wireless networks Relays Upper bound Degradation Fading Information theory Channel coding Unicast Performance analysis
Content Type	Text
Resource Type	Article

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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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