点击次数：

论文类型：期刊论文

发表时间：2018-10-01

发表刊物：IEEE WIRELESS COMMUNICATIONS LETTERS

收录刊物：SCIE

卷号：7

期号：5

页面范围：732-735

ISSN号：2162-2337

关键字：Maximal-ratio combining; non-orthogonal multiple access; power allocation; relay; spectrum sharing

摘要：In this letter, a two-slot secondary non-orthogonal multiple access (NOMA) relay is used to assist spectrum sharing, where the primary transceivers with long distance communicate through the relay. First, the information for the primary receiver (PR) and secondary receivers (SRs) is transmitted via the NOMA relay. Then, the information for PR is re-transmitted to it through a selected SR to improve its quality of service using maximal-ratio combining, while the next data for PR is sent from the primary transmitter to the NOMA relay simultaneously. The power allocation solution is derived for the NOMA relay. Simulation results have shown the effectiveness of the proposed scheme.