首页> 外文期刊>IEEE Communications Magazine >Distributed Coordinated Transmission with Forward-Backward Training for 5G Radio Access
【24h】

Distributed Coordinated Transmission with Forward-Backward Training for 5G Radio Access

机译:用于5G无线电接入的具有前向后训练的分布式协调传输

获取原文
获取原文并翻译 | 示例

摘要

CoMP transmission and reception have been considered in cellular networks for enabling larger coverage, improved rates, and interference mitigation. To harness the gains of coordinated beamforming, fast information exchange over a backhaul connecting the cooperating BSs is required. In practice, the bandwidth and delay limitations of the backhaul may not be able to meet such stringent demands. These impairments motivate the study of cooperative approaches based only on local CSI that require minimal or no information exchange between the BSs. To this end, several distributed approaches are introduced for CB-CoMP. The proposed methods rely on the channel reciprocity and iterative spatially precoded over-the-air pilot signaling. We elaborate how F-B training facilitates distributed CB by allowing BSs and UEs to iteratively optimize their respective transmitters/receivers based on only locally measured CSI. The trade-off due to the overhead from the F-B iterations is discussed. We also consider the challenge of dynamic TDD where the UE-UE channel knowledge cannot be acquired at the BSs by exploiting channel reciprocity. Finally, standardization activities and practical requirements for enabling the proposed F-B training schemes in 5G radio access are discussed.
机译:在蜂窝网络中已经考虑了CoMP传输和接收,以实现更大的覆盖范围,更高的速率和减轻干扰。为了利用协调波束成形的增益,需要通过连接协作BS的回程进行快速信息交换。实际上,回程的带宽和延迟限制可能无法满足这样严格的要求。这些障碍激发了仅基于本地CSI的协作方法的研究,而本地CSI要求BS之间的信息交换最少或不需要。为此,针对CB-CoMP引入了几种分布式方法。所提出的方法依赖于信道互易性和在空间上迭代地空中编码的导频信令。我们详细说明F-B训练如何通过允许BS和UE仅基于本地测量的CSI迭代地优化各自的发射机/接收机来促进分布式CB。讨论了由于F-B迭代产生的开销而导致的权衡。我们还考虑了动态TDD的挑战,其中无法通过利用信道互易性在BS处获取UE-UE信道知识。最后,讨论了实现5G无线电接入中建议的F-B培训方案的标准化活动和实际要求。

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