• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Information Theory, IEEE Transactions on >Bandwidth and Power Allocation for Cooperative Strategies in Gaussian Relay Networks
【24h】

Bandwidth and Power Allocation for Cooperative Strategies in Gaussian Relay Networks

机译：高斯中继网络中合作策略的带宽和功率分配

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

Achievable rates with amplify-and-forward (AF) and decode-and-forward (DF) cooperative strategies are examined for relay networks. Motivated by sensor network applications, power-constrained networks with large bandwidth resources and a large number of nodes are considered. It is shown that AF strategies do not necessarily benefit from the available bandwidth. Rather, transmitting in the optimum AF bandwidth allows the network to operate in the linear regime where the achieved rate increases linearly with the available network power. The optimum power allocation among the AF relays, shown to be a form of maximal ratio combining, indicates the favorable relay positions. Orthogonal node transmissions are also examined. While the same optimum bandwidth result still holds, the relay power allocation in this case can be viewed as a form of water-filling. In contrast, the DF strategy will optimally operate in the wideband regime and is shown to require a different choice of relays. Thus, in a large scale network, the choice of a coding strategy goes beyond determining a coding scheme at a node; it also determines the operating bandwidth, as well as the set of relays and best distribution of the relay power.
机译：对于中继网络，研究了使用放大转发（AF）和解码转发（DF）合作策略可达到的速率。受传感器网络应用的推动，考虑了具有大带宽资源和大量节点的功率受限网络。结果表明，AF策略不一定能从可用带宽中受益。而是，以最佳AF带宽进行传输允许网络以线性方式运行，在这种方式下，达到的速率随可用网络功率线性增加。 AF继电器之间的最佳功率分配（以最大比率组合的形式显示）指示了有利的继电器位置。还检查了正交节点传输。尽管仍然保持相同的最佳带宽结果，但是在这种情况下，可以将中继功率分配视为注水的一种形式。相反，DF策略将在宽带状态下最佳运行，并且显示出需要对中继进行不同的选择。因此，在大规模网络中，编码策略的选择超出了在节点处确定编码方案的范围。它还确定工作带宽，继电器组和继电器功率的最佳分配。

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