大规模MIMO系统中基于用户分类的动态导频分配

doi:10.11959/j.issn.1000-0801.2017212

Abstract

Abstract:

Aiming at the problem of pilot contamination in massive MIMO system,a dynamic pilot assignment strategy based on user classification was proposed.The target cell user was divided into the central user and the edge user based on the variance of target cell user signal intensity.The central user used the maximum C/I algorithm to assign pilots to maximize the channel capacity of the central user.The edge user used greedy algorithm to assign pilots to improve the signal to interference and noise ratio of each edge user.Simulation results show that the proposed strategy can improve the channel capacity of the system while improving the signal to interference and noise ratio of the edge user.

Key words: massive MIMO, pilot contamination, pilot assignment, user classification

CLC Number:

TN929

Jinyan ZHANG,Feng JIN,Lixin YIN. Dynamic pilot assignment in massive MIMO system based on user classification[J]. Telecommunications Science, 2017, 33(9): 76-84.

Figures/Tables 7

References 16

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名称	参数
小区数L/个	7
每小区用户数K/个	8～16
基站天线数M/个	8～512
导频长度τ	32
小区半径R/m	1 000
导频发射功率ρ_pilot/dB	15
下行数据发射功率ρ_dl/dB	20
路径损耗因子α	3.8
对数阴影衰落σ/dB	8
基站与用户之间最小距离r_min/m	100
传统中心用户距基站的最远距离r_Cmax/m	800

Dynamic pilot assignment in massive MIMO system based on user classification

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