Cooperative Non-Orthogonal Multiple Access in Cognitive Radio
Cooperative Non-Orthogonal Multiple Access in Cognitive Radio
复制标题
DOI：
10.1109/lcomm.2016.2596763
复制
发表时间：
2016-08
期刊：
影响因子：
--
通讯作者：
Lu Lv;Jian Chen-;Q. Ni
中科院分区：
文献类型：
--
作者：
Lu Lv;Jian Chen-;Q. Ni
本文研究了非正交多址接入技术在认知无线电下行链路系统中的应用。提出了一种新的协作传输方案，旨在利用CR-NOMA系统提供的固有空间分集。解析结果表明，当次用户参与中继时，协作传输方案的性能更好，次用户处的分集阶数最大，主用户处的分集阶数为2。仿真结果验证了该方案的性能和分析结果的准确性。
This letter studies the application of non-orthogonal multiple access to a downlink cognitive radio (termed CR-NOMA) system. A new cooperative transmission scheme is proposed aimed at exploiting the inherent spatial diversity offered by the CR-NOMA system. The closed-form analytical results are developed to show that the cooperative transmission scheme gives better performance when more secondary users participate in relaying, which helps achieve the maximum diversity order at secondary user and a diversity order of two at primary user. The simulations are performed to validate the performance of the proposed scheme and the accuracy of the analytical results.