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Computer Science > Information Theory

arXiv:0807.3097 (cs)
[Submitted on 19 Jul 2008]

Title:Energy-Efficient Power Control in Multipath CDMA Channels via Large System Analysis

Authors:Stefano Buzzi, Valeria Massaro, H. Vincent Poor
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Abstract: This paper is focused on the design and analysis of power control procedures for the uplink of multipath code-division-multiple-access (CDMA) channels based on the large system analysis (LSA). Using the tools of LSA, a new decentralized power control algorithm aimed at energy efficiency maximization and requiring very little prior information on the interference background is proposed; moreover, it is also shown that LSA can be used to predict with good accuracy the performance and operational conditions of a large network operating at the equilibrium over a multipath channel, i.e. the power, signal-to-interference-plus-noise ratio (SINR) and utility profiles across users, wherein the utility is defined as the number of bits reliably delivered to the receiver for each energy-unit used for transmission. Additionally, an LSA-based performance comparison among linear receivers is carried out in terms of achieved energy efficiency at the equilibrium. Finally, the problem of the choice of the utility-maximizing training length is also considered. Numerical results show a very satisfactory agreement of the theoretical analysis with simulation results obtained with reference to systems with finite (and not so large) numbers of users.
Comments: Proceedings of the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Cannes, France, September 15-18, 2008
Subjects: Information Theory (cs.IT); Computer Science and Game Theory (cs.GT)
Cite as: arXiv:0807.3097 [cs.IT]
  (or arXiv:0807.3097v1 [cs.IT] for this version)
  https://doi.org/10.48550/arXiv.0807.3097
Related DOI: https://doi.org/10.1109/PIMRC.2008.4699484

Submission history

From: Stefano Buzzi [view email]
[v1] Sat, 19 Jul 2008 14:19:20 UTC (119 KB)
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