SCIENCE CHINA Information Sciences, Volume 59 , Issue 2 : 022307(2016) https://doi.org/10.1007/s11432-015-5503-7

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

Jiahui LI 1,2,3, Limin XIAO 1,2,3, Xibin XU 1,2,3, Shidong ZHOU 1,2,3,*
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  • ReceivedAug 11, 2015
  • AcceptedNov 24, 2015
  • PublishedJan 5, 2016


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.

Funded by

Open Research Fund of National Mobile Communications Research Laboratory Southeast University(2012D02)

National Natural Science Foundation of China(61201192)

International Science and Technology Cooperation Program(2012DFG12010)

Tsinghua University Initiative Scientific Research(2015Z02-3)

National High Technology Research and Development Program of China(863 Program)

Science Fund for Creative Research Groups of NSFC(61321061)

"source" : null , "contract" : "2014AA01A704"

National Basic Research Program of China(2012CB316002)

Key Grant Project of Chinese Ministry of Education(313005)

National S&T Major Project(2014ZX03003003-002)


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