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Is broadcast plus multiaccess optimal for Gaussian wireless networks?

Dana, Amir F. and Sharif, Masoud and Gowaikar, Radhika and Hassibi, Babak and Effros, Michelle (2003) Is broadcast plus multiaccess optimal for Gaussian wireless networks? In: Asilomar Conference on Signals, Systems and Computers, 37th, Pacific Grove, CA, 9-12 November 2003. Vol.2. IEEE , Piscataway, NJ, pp. 1748-1752. ISBN 0780381041.

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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.

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Additional Information:© 2004 IEEE. Reprinted with permission. This work was supported in part by the National Science Foundation under grant no. CCR-0133818, by the Office of Naval Research under grant no. N00014-02-1-0578, and by Caltech's Lee Center for Advanced Networking.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-02-1-0578
Caltech Lee Center for Advanced NetworkingUNSPECIFIED
Subject Keywords:Gaussian channels, broadcast channels, channel capacity, fading channels, radio networks
Record Number:CaltechAUTHORS:DANasilo03
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7377
Deposited By: Lindsay Cleary
Deposited On:07 Feb 2007
Last Modified:08 Nov 2021 20:42

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