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• W2003264162 abstract "In this paper, we address the problem of beamforming (BF) design in a cognitive relay network (CRN), where the cognitive network not only shares the spectrum with the primary one but also acts as a relay to assist the primary signal transmission. Considering that all of the wireless channels are subject to the correlated Rayleigh fading distribution, we first formulate a constrained optimization problem to minimize the total transmit power of the cognitive base station (CBS) with multiple antennas, while guaranteeing the quality-of-service (QoS) of the primary and secondary users and keeping the mutual interference below an acceptable level. Then, by adopting the available partial channel state information (CSI), and proposing an approximation method to relax the constraints, a support vector machine (SVM) based algorithm is presented to solve the optimization problem for the BF weight vectors. The benefit of the new approach is that the slow change of the partial CSI can be taken into account. Finally, computer simulation results are provided to confirm the superiority of the proposed BF design strategy." @default.
• W2003264162 created "2016-06-24" @default.
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• W2003264162 date "2013-12-01" @default.
• W2003264162 modified "2023-09-27" @default.
• W2003264162 title "BF design in cognitive relay networks via support vector machines" @default.
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• W2003264162 doi "https://doi.org/10.1109/glocom.2013.6831572" @default.
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