...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Information Theory >Robust Regularized ZF in Cooperative Broadcast Channel Under Distributed CSIT
【24h】

Robust Regularized ZF in Cooperative Broadcast Channel Under Distributed CSIT

机译：分布式CSIT下协作广播信道中的鲁棒正则ZF

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

In this work, we consider the sum rate performance of joint processing coordinated multi-point transmission network (JP-CoMP, a.k.a Network MIMO) in a so-called distributed channel state information (D-CSI) setting. In the D-CSI setting, the various transmitters (TXs) acquire a local, TX-dependent, estimate of the global multi-user channel state matrix obtained via terminal feedback and limited backhauling. The CSI noise across TXs can be independent or correlated, so as to reflect the degree to which TXs can exchange information over the backhaul, hence allowing to model a range of situations bridging fully distributed and fully centralized CSI settings. In this context we aim to study the price of CSI distributiveness in terms of sum rate at finite SNR when compared with conventional centralized scenarios. We consider the family of JP-CoMP precoders known as regularized zero-forcing (RZF). We conduct our study in the large scale antenna regime, as it is currently envisioned to be used in real 5G deployments. It is then possible to obtain accurate approximations on so-called deterministic equivalents of the signal to interference and noise ratios. Guided by the obtained deterministic equivalents, we propose an approach to derive a RZF scheme that is robust to the distributed aspect of the CSI, whereby the key idea lies in the optimization of a TX-dependent power level and regularization factor. Our analysis confirms the improved robustness of the proposed scheme with respect to CSI inconsistency at different TXs, even with moderate number of antennas and receivers (RXs).
机译：在这项工作中，我们考虑了在所谓的分布式信道状态信息（D-CSI）设置中联合处理协同多点传输网络（JP-CoMP，又称为网络MIMO）的总速率性能。在D-CSI设置中，各种发送器（TX）获取通过终端反馈和有限回程获得的全局，依赖于TX的全局多用户信道状态矩阵的估计。跨TX的CSI噪声可以独立或相关，以反映TX可以通过回程交换信息的程度，因此可以对一系列情况进行建模，以桥接完全分布式和完全集中的CSI设置。在这种情况下，我们旨在与常规集中式方案相比，以有限信噪比下的总速率研究CSI分布的价格。我们考虑了JP-CoMP预编码器系列，称为正则归零强制（RZF）。我们目前正在设想将其用于实际5G部署中，并在大规模天线领域中进行研究。这样就有可能获得对信噪比和噪声比的所谓确定性当量的精确近似。在获得的确定性等价物的指导下，我们提出了一种方法，用于推导对CSI的分布式方面具有鲁棒性的RZF方案，其中关键思想在于优化与TX有关的功率水平和正则化因子。我们的分析证实了即使在天线和接收器（RX）数量适中的情况下，针对不同TX的CSI一致性，所提方案的鲁棒性也得到了提高。

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