Cross-Layer Antenna Beamforming and Power Control in Wireless Uplinks |
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Authors: | Konstantinos P Tsoukatos Maria-Pinelopi Chrisanthopoulou Apostolos Apostolaras |
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Affiliation: | (1) ECE, Concordia University, Montreal, Quebec, Canada;(2) CIISE, Concordia University, Montreal, Quebec, Canada;(3) CIISE & GERAD & CIRRELT, Concordia University, Montreal, Quebec, Canada |
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Abstract: | 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. |
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Keywords: | |
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