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Energy Efficiency and SINR Maximization Beamformers for Cognitive Radio Utilizing Sensing Information

Bibliography:

A. Alabbasi, Z. Rezki, B. Shihada, Energy Efficiency and SINR Maximization Beamformers for Cognitive Radio Utilizing Sensing Information, Information Theory (ISIT), 2014 IEEE International Symposium on Information Theory (ISIT), Honolulu, 2014

Authors:

A. Alabbasi, Z. Rezki, B. Shihada

Keywords:

Cognitive radio, MIMO, beamforming, energy efficiency, resource allocation, spectrum sensing, spectrum sharing

Year:

2014

Abstract:

In this paper we consider a cognitive radio multi-input multi-output environment in which we adapt our beamformer to maximize both energy efficiency and signal to interference plus noise ratio (SINR) metrics. Our design considers an underlaying communication using adaptive beamforming schemes combined with the sensing information to achieve an optimal energy efficient system. The proposed schemes maximize the energy efficiency and SINR metrics subject to cognitive radio and quality of service constraints. Since the optimization of energy efficiency problem is not a convex problem, we transform it into a standard semi-definite programming (SDP) form to guarantee a global optimal solution. Analytical solution is provided for one scheme, while the other scheme is left in a standard SDP form. Selected numerical results are used to quantify the impact of the sensing information on the proposed schemes compared to the benchmark ones.

ISSN:

DOI: 10.1109/ISIT.2014.6875061