...
  • 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 >Cooperation for Interference Management: A GDoF Perspective
【24h】

Cooperation for Interference Management: A GDoF Perspective

机译：干扰管理合作：GDoF视角

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

The impact of cooperation on interference management is investigated by studying an elemental wireless network, the so-called symmetric interference relay channel (IRC), from a generalized degrees of freedom (GDoF) perspective. This is motivated by the fact that the deployment of relays is considered as a remedy to overcome the bottleneck of current systems in terms of achievable rates. The focus of this paper is on the regime in which the interference link is weaker than the source-relay link in the IRC. Our approach toward studying the GDoF goes through the capacity analysis of the linear deterministic IRC (LD-IRC). New upper bounds on the sum capacity of the LD-IRC based on genie-aided approaches are established. These upper bounds together with some existing upper bounds are achieved by using four novel transmission schemes. Extending the upper bounds and the transmission schemes to the Gaussian case, the GDoF of the Gaussian IRC is characterized for the aforementioned regime. This completes the GDoF results available in the literature for the symmetric GDoF. It turns out that even if the incoming and outgoing links of the relay are both weaker than the desired channel, involving a relay can increase the GDoF. Interestingly, utilizing the relay in this case can increase the slope of the GDoF from −2 [in the interference channel (IC)] to −1 or 0. This shrinks the regime where ignoring the interference by treating it as noise is optimal. Furthermore, the analysis shows that if the relay ingoing and outgoing links are sufficiently strong, the relay is able to neutralize the interference completely. In this case, the bottleneck of the transmission will be the interference links, and hence, the GDoF increases if the interference link gets stronger. It is shown that in the strong interference regime, in contrast to the IC, the GDoF can be a monotonically decreasing function of the interference level.
机译：通过从通用自由度（GDoF）角度研究基本无线网络，即所谓的对称干扰中继信道（IRC），研究了协作对干扰管理的影响。这是由以下事实激发的：中继器的部署被视为解决可达到的速率方面克服当前系统瓶颈的一种补救措施。本文的重点是干扰链路比IRC中的源－中继链路弱的机制。我们研究GDoF的方法是通过线性确定性IRC（LD-IRC）的容量分析。建立了基于精灵辅助方法的LD-IRC总容量的新上限。这些上限和一些现有的上限是通过使用四种新颖的传输方案来实现的。将上限和传输方案扩展到高斯情况，高斯IRC的GDoF的特征是上述机制。这样就完成了文献中有关对称GDoF的GDoF结果。事实证明，即使中继的入站和出站链路都弱于期望的信道，涉及中继也会增加GDoF。有趣的是，在这种情况下使用继电器可以将GDoF的斜率从[干扰通道（IC）中的-2]增加到-1或0。这样可以缩小将干扰视为噪声最佳而忽略干扰的情况。此外，分析表明，如果中继站的入站和出站链接足够牢固，则中继站可以完全抵消干扰。在这种情况下，传输的瓶颈将是干扰链路，因此，如果干扰链路变强，则GDoF会增加。结果表明，在强干扰状态下，与IC相反，GDoF可能是干扰电平的单调递减函数。

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