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We study the problem of joint power control and beamforming for the uplink of a secondary wireless network that shares spectrum with a primary network to which the spectrum is licensed. The objective is to minimize the total transmitted power by the system and satisfy the quality of service (QoS) requirements of both primary and secondary users with priority being given to the primary users. We formulate...
We consider a system where a licensed radio spectrum is shared by two networks, namely the primary network and the secondary network. The spectrum is licensed to the primary network, however the secondary network makes opportunistic access of the unused and/or underutilized portions of it by using cognitive radio technology. For such a system, we study the problem of joint power control and beamforming...
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