【作 者】Daniel Benevides Da CostaBeongku AnNhu Tri DoTrung Q. Duong
【作者单位】Department of Computer Engineering, Federal University of CearáDepartment of Electronics, Electrical Engineering and Computer Science, Queens University Belfast, Belfast, U.KDepartment of Electronics and Computer Engineering, Hongik University, Sejong, South KoreaSobral, CE, Brazil
【摘 要】 In this letter, we investigate the outage performance of cooperative relaying transmissions in two-user non-orthogonal multiple access systems, wherein simultaneous wireless information and power transfer is employed at the near users to power their ... 更多 >> In this letter, we investigate the outage performance of cooperative relaying transmissions in two-user non-orthogonal multiple access systems, wherein simultaneous wireless information and power transfer is employed at the near users to power their relaying operations. To this end, a best-near best-far (BNBF) user selection scheme is proposed. Considering three relaying protocols, i.e., decode-and-forward (DF), amplify-and-forward (AF), and hybrid DF/AF protocols, tight closed-form approximate expressions for the outage probability are derived to evaluate the system performance. Numerical results reveal that, for any relaying protocols used, the diversity order achieved by the BNBF scheme is M+1, where M is the number of far users, and does not depend on the number of near users. << 收起
