...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Communications >Buffer-Aided Non-Orthogonal Multiple Access Relaying Systems in Rayleigh Fading Channels
【24h】

Buffer-Aided Non-Orthogonal Multiple Access Relaying Systems in Rayleigh Fading Channels

机译：瑞利衰落信道中的缓冲区辅助非正交多址中继系统

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

Non-orthogonal multiple access (NOMA) is a promising technology in future communication systems. In this paper, we propose a buffer-aided NOMA relaying system, which consists of a source, a relay, and two destinations. In the relaying system, the relay helps the source transmit packets to two destinations simultaneously using NOMA scheme. We theoretically derive outage probabilities of source-to-relay link and relay-to-destinations links considering two scenarios that the relay does and does not know the channel state information (CSI) from itself to two destinations. When the relay knows CSI, the obtained outage probability of relay-to-destinations links involves integration operation. Thus, we derive an upper bound and two lower bounds. Simulation results demonstrate that two lower bounds approach exact outage probability at low and high signal-to-noise ratios, respectively. We also propose a relay decision scheme for the buffer-aided NOMA relaying system. Based on the obtained system outage probability, we theoretically derive the diversity order. It is found that no matter whether the relay knows CSI or not, the diversity order of 2 can be achieved when the buffer size is larger than or equal to 3.
机译：非正交多路访问（NOMA）是未来通信系统中的一项有前途的技术。在本文中，我们提出了一种缓冲辅助的NOMA中继系统，该系统由一个源，一个中继和两个目标组成。在中继系统中，中继使用NOMA方案帮助源同时将数据包传输到两个目的地。从理论上我们考虑中继站知道和不知道从其到两个目的地的信道状态信息（CSI）的两种情况，得出源到中继链路和中继到目的地链路的中断概率。当中继知道CSI时，获得的中继到目标链路的中断概率涉及集成操作。因此，我们得出一个上限和两个下限。仿真结果表明，两个下限分别在低信噪比和高信噪比时接近精确的中断概率。我们还为缓冲区辅助NOMA中继系统提出了一种中继决策方案。基于获得的系统中断概率，理论上我们可以得出分集阶数。可以发现，无论中继器是否知道CSI，当缓冲区大小大于或等于3时，分集阶数都可以达到2。

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