Cell-Edge-Aware Precoding for Downlink Massive MIMO Cellular Networks

Howard H. Yang, Giovanni Geraci, Tony Q.S. Quek, Jeffrey G. Andrews

研究成果: Article同行評審

23 引文 斯高帕斯(Scopus)

摘要

We propose a cell-edge-aware (CEA) zero forcing (ZF) precoder that exploits the excess spatial degrees of freedom provided by a large number of base station (BS) antennas to suppress inter-cell interference at the most vulnerable user equipments (UEs). We evaluate the downlink performance of CEA-ZF, as well as that of a conventional cell-edge-unaware (CEU) ZF precoder in a network with a random BS topology. Our analysis and simulations show that the proposed CEA-ZF precoder outperforms CEU-ZF precoding in terms of (i) aggregate per-cell data rate, (ii) coverage probability, and (iii) 95% -likely, or edge user, rate. In particular, when both perfect channel state information and a large number of antennas N are available at the BSs, we demonstrate that the outage probability under CEA-ZF and CEU-ZF decay as 1/N2 and 1/N, respectively. This result identifies CEA-ZF as a more effective precoding scheme for massive multiple-input multiple-output (MIMO) cellular networks. Our framework also reveals the importance of scheduling the optimal number of UEs per BS, and confirms the necessity to control the amount of pilot contamination received during the channel estimation phase.

原文English
文章編號7891589
頁(從 - 到)3344-3358
頁數15
期刊IEEE Transactions on Signal Processing
65
發行號13
DOIs
出版狀態Published - 2017 七月 1

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

指紋 深入研究「Cell-Edge-Aware Precoding for Downlink Massive MIMO Cellular Networks」主題。共同形成了獨特的指紋。

引用此