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Cognitive radio and MIMO have drawn significant attention to achieve high spectrum utilization efficiency. On the other hand, increasing energy demand and soaring energy related operating cost call for new design of energy efficient communication networks. In this paper, we study the energy efficiency optimization in a cognitive radio MIMO network. Specifically, we propose both distributed and centralized...
This paper considers a multiple-input-multiple-output (MIMO) cognitive radio network, where secondary users (SUs) equipped with multiple antennas coexist with a primary user (PU). Joint power allocation and transmission beamforming design is proposed to optimize the network energy efficiency under power constraint and interference temperature constraint. Distributed algorithm that maximizes energy...
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