Abstract
We consider the coordinated beamforming design problem for the cooperative cognitive radio networks (CCRN) with multiple secondary base station (SBS) under outage probability constraints, and the SBSs are equipped with full-duplex (FD) transceivers applying time division multiple access (TDMA) for transmission. All SBSs only know the local channel distribution information (CDI). A series of approximation methods are employed to deal with this problem, such as semidefinite relaxation (SDR) and first-order approximation method. We obtain the near-optimal solution via solving a sequence of convex approximation problems, i.e., the proposed efficient successive convex approximation (SCA) algorithm yields a satisfactory solution. We analytically prove that any limit point of the conservative approximation problem P1’s solution is a stationary point. The coordinated beamforming design problem for the SBS with half-duplex (HD) transceiver is formulated, and there exists a tradeoff between FD and HD transceivers in the simulation results. Furthermore, we can observe that the self-interference limits the performance of FD transceivers. The performance of the proposed SCA algorithm is examined by comparing with exhaustive search method, antenna selection (AS) scheme, and maximum ratio transmission (MRT).