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arXiv 1401.3071cs.ITmath.IT
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基于随机矩阵理论的分布式天线系统性能分析框架

A Framework of Performance Analysis for Distributed Antenna Systems Based on Random Matrix Theory

Ang Yang, Zesong Fei, Chengwen Xing, Shaodan Ma, Jingming Kuang, Dalin Zhu, Ming Lei

摘要:

未来的通信系统肯定会建立在绿色基础设施上。为了实现这一目标,中国移动提出了一种新的网络基础设施-云无线接入网(C-RAN),以提高网络覆盖率并同时节省能量。在C-RAN中,为了节省更多的能量,无线电前端与共置基带单元分离,并且分布式地位于物理位置。C-RAN可以被认为是分布式天线系统(DAS)的变体。本文利用随机矩阵理论分析了C-RANS的性能。由于天线在地理上分布而不是安装在附近的事实,所考虑的信道矩阵中的条目的方差彼此不同。据作者所知,关于具有不同方差元素的随机矩阵的工作在很大程度上是公开的,这对于DAS是非常重要的。本文首先给出了具有不同方差的随机矩阵的特征值分布的一些基本结果。然后基于这些基本结论,所考虑的DAS的中断概率推导。最后,我们的分析结果的准确性进行了评估的一些数值结果。

英文摘要:

Future communications systems will definitely be built on green infrastructures. To realize such a goal, recently a new network infrastructure named cloud radio access network (C-RAN) is proposed by China Mobile to enhance network coverage and save energy simultaneously. In C-RANs, to order to save more energy the radio front ends are separated from the colocated baseband units and distributively located in physical positions. C-RAN can be recognized as a variant of distributed antenna systems (DASs). In this paper we analyze the performance of C-RANS using random matrix theory. Due to the fact that the antennas are distributed geographically instead of being installed nearby, the variances of the entries in the considered channel matrix are different from each other. To the best of the authors' knowledge, the work on random matrices with elements having different variances is largely open, which is of great importance for DASs. In our work, some fundamental results on the eigenvalue distributions of the random matrices with different variances are derived first. Then based on these fundamental conclusions the outage probability of the considered DAS is derived. Finally, the accuracy of our analytical results is assessed by some numerical results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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