Joint Beamforming and Power Optimization with Per-Antenna Power Constraints in Cognitive MISO System

Wen Tao Zhu; Xu Liu; Jing Bo Yang

doi:10.4028/www.scientific.net/AMM.742.674

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 742Joint Beamforming and Power Optimization with...

Joint Beamforming and Power Optimization with Per-Antenna Power Constraints in Cognitive MISO System

Abstract:

Joint Beamforming and power allocation schemes are considered for cognitive radio (CR) multiple input single output (MISO) system in this paper. We considered the robust downlink beamforming and power allocation problem with per-antenna power constraints which is more realistic in practice, instead of sum-power constraint, under the imperfect channel state information (CSI). Since the given optimization problem is a non-convex problem which is difficult to handle, we transformed it into second order cone program (SOCP) problem, which can be solved efficiently. Simulation shows that the proposed scheme indeed has a better performance in CR system.

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Periodical:

Applied Mechanics and Materials (Volume 742)

Pages:

674-678

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.742.674

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Online since:

March 2015

Authors:

Wen Tao Zhu*, Xu Liu, Jing Bo Yang

Keywords:

Beamforming, Cognitive Radio, Multiple Input Single Output, Power Allocation

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