NDLI: Optimal spectrum allocation in Gaussian interference networks

Content Provider	IEEE Xplore Digital Library
Author	Hongxia Shen Hang Zhou Berry, R.A. Honig, M.L.
Copyright Year	2008
Description	Author affiliation: Dept. of EECS, Northwestern Univ., Evanston, IL (Hongxia Shen; Hang Zhou; Berry, R.A.; Honig, M.L.)
Abstract	We consider a wireless network in which multiple users share a common spectrum band, modeled as a Gaussian interference network. Our objective is to choose the transmit power spectral density of each user to maximize the sum rate, subject to individual power constraints at each transmitter. This includes frequency-orthogonal transmissions and full-spreading with power control as special cases. Assuming single-user receivers and treating interference as noise, the resulting optimization problem is non-convex. Nevertheless, for a two-user model with flat-fading we completely characterize the optimal solution. In particular, we show that the optimal power allocation consists of each user using a piecewise constant power allocation over at most 3 frequency bands, where at most one band is shared by the two users. Extensions to more than two users and a distributed algorithm to implement the optimal allocation are also presented.
Starting Page	2142
Ending Page	2146
File Size	2766981
Page Count	5
File Format	PDF
ISBN	9781424429400
ISSN	10586393
DOI	10.1109/ACSSC.2008.5074813
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interference Radio spectrum management Fading Transmitters Bandwidth Iterative algorithms Signal to noise ratio Wireless networks Power control Distributed algorithms
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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