...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of communication systems >Performance analysis of nonorthogonal multiple access-based underlay cognitive relay network
【24h】

Performance analysis of nonorthogonal multiple access-based underlay cognitive relay network

机译：基于非正交多址访问的底层认知中继网络的性能分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper considers cooperative non-orthogonal multiple access (NOMA) scheme in an underlay cognitive radio (CR) network. A single-cell downlink cooperative NOMA system has been considered for the secondary network, consisting of a base station (BS) and two secondary users, ie, a far user and a near user. The BS employs NOMA signaling to send messages for the two secondary users where the near user is enabled to act as a half-duplex decode-and-forward (DF) relay for the far user. We derive exact expressions for the outage probability experienced by both the users and the outage probability of the secondary system assuming the links to experience independent, nonidentically distributed Rayleigh fading. Further, we analyze the ergodic rates of both the users and the ergodic sum rate of the secondary network. The maximum transmit power constraint of the secondary nodes and the tolerable interference power constraint at the primary receiver are considered for the analysis. Further, the interference caused by the primary transmitter (PT) on the secondary network is also considered for the analysis. The performance of the proposed CR NOMA network has been observed to be significantly better than a CR network that uses conventional orthogonal multiple access (OMA) scheme. The analytical results are validated by extensive simulation studies.
机译：本文考虑了底层认知无线电（CR）网络中的协作非正交多址（NOMA）方案。已经考虑了用于次级网络的单小区下行链路协作式NOMA系统，该系统包括一个基站（BS）和两个次级用户，即一个远端用户和一个接近用户。 BS采用NOMA信令为两个辅助用户发送消息，其中使近端用户能够充当远端用户的半双工解码转发（DF）中继。假设链接经历了独立的，不完全相同的瑞利衰落，我们就得出了用户和二次系统的中断概率的精确表达式。此外，我们分析了用户的遍历率和辅助网络的遍历总和率。分析时考虑了辅节点的最大发射功率约束和主接收机处的可容忍干扰功率约束。此外，还考虑了由主发射机（PT）对辅助网络造成的干扰进行分析。已经观察到所提出的CR NOMA网络的性能明显优于使用常规正交多址访问（OMA）方案的CR网络。通过大量的模拟研究验证了分析结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号