Cross-Layer Antenna Beamforming and Power Control in Wireless Uplinks

We consider backlog-driven power control and antenna beamforming as a means to maximize network throughput in a wireless uplink, where a base station receives with an antenna array from single-antenna wireless users. Throughput maximization gives rise to an optimization problem which is in general n...

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Bibliographic Details
Published inWireless personal communications Vol. 51; no. 3; pp. 399 - 409
Main Authors Tsoukatos, Konstantinos P., Chrisanthopoulou, Maria-Pinelopi, Apostolaras, Apostolos
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.11.2009
Subjects
Communications Engineering
Computer Communication Networks
Engineering
Networks
Signal,Image and Speech Processing
Beamforming
Alternating maximization
Wireless throughput
Power control
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Summary:We consider backlog-driven power control and antenna beamforming as a means to maximize network throughput in a wireless uplink, where a base station receives with an antenna array from single-antenna wireless users. Throughput maximization gives rise to an optimization problem which is in general non-concave. We introduce a cross-layer, alternating maximization algorithm searching for the optimal solution, and a variant of the algorithm with reduced complexity. The algorithm alternates between a power control step and a beamforming step. Simulation results illustrate the convergence of the proposed scheme to a locally optimal pair of power vector and beamforming matrix, and quantify its throughput gains in a system with stochastic arrivals.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-009-9749-5