Sectorization based pilot reuse for improving net spectral efficiency in the multicell massive MIMO system  

作　　者：Jiahui LI Limin XIAO Xibin XU Shidong ZHOU 

机构地区：[1]State Key Laboratory on Microwave and Digital Communications, Beijing 100084, China [2]Tsinghua National Laboratory for Information Science and Technology, Beijing 100084, China [3]Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Science China(Information Sciences)》2016年第2期93-107,共15页中国科学（信息科学）（英文版）

基　　金：supported by National Basic Research Program of China(Grant No.2012CB316002);National Natural Science Foundation of China(Grant No.61201192);National High Technology Research and Development Program of China(863 Program)(Grant No.2014AA01A704);Science Fund for Creative Research Groups of NSFC(Grant No.61321061);International Science and Technology Cooperation Program(Grant No.2012DFG12010);National S&T Major Project(Grant No.2014ZX03003003-002);Key Grant Project of Chinese Ministry of Education(Grant No.313005);Tsinghua University Initiative Scientific Research(Grant No.2015Z02-3);Open Research Fund of National Mobile Communications Research Laboratory;Southeast University(Grant No.2012D02);Tsinghua-Qualcomm Joint Research Program

摘　　要：A sectorization method using the uniform circular array（UCA） is proposed to improve the net spectral efficiency（SE） of the multicell massive MIMO system, which is an important index for evaluating the performance of a communication system. We derive the ergodic achievable uplink net SE per cell of a general sectorized system and obtain its deterministic approximation based on the large random matrix theory.Different weight matrices are considered for the sectorized system and the one with the best performance is utilized for further analysis. The consistency of the deterministic approximation with the result of Monte-Carlo simulation is proved at the same time. At last, numerical results indicate that the net SE per cell can be greatly improved compared to the conventional multicell massive MIMO system, which validates the effectiveness of the sectorization method. Moreover, comparisons with other pilot reuse methods are also made in this paper.A sectorization method using the uniform circular array（UCA） is proposed to improve the net spectral efficiency（SE） of the multicell massive MIMO system, which is an important index for evaluating the performance of a communication system. We derive the ergodic achievable uplink net SE per cell of a general sectorized system and obtain its deterministic approximation based on the large random matrix theory.Different weight matrices are considered for the sectorized system and the one with the best performance is utilized for further analysis. The consistency of the deterministic approximation with the result of Monte-Carlo simulation is proved at the same time. At last, numerical results indicate that the net SE per cell can be greatly improved compared to the conventional multicell massive MIMO system, which validates the effectiveness of the sectorization method. Moreover, comparisons with other pilot reuse methods are also made in this paper.

关 键 词：massive MIMO multicell net SE pilot reuse sectorization UCA 

分 类 号：TN919.3[电子电信—通信与信息系统]