Abstract

The article proposes a kind of joint relay and antenna selection scheme with the optimal power allocation in full-duplex(FD) cognitive relay network(CRN), including a pair of source and destination node, some FD amplify-and-forward (AF) relays and one primary user. In this work, the transmit (Tx) antenna and receive (Rx) antenna of each relay are selected adaptively. Then, the relay under optimal power allocation with optimal antenna mode is chosen to enhance the system performance. The closed-form expressions of the optimal power allocation are derived. And the performance of the proposed scheme is analyzed. Numerical results demonstrate that the system performance can be greatly improved through employing the ORAMS-PA, especially when the loop-interference is low. It is shown that the proposed scheme is realizable and significant in CRN with respect to improve spectral efficiency.

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