联合时移和空间划分方法抑制大规模MIMO导频污染

doi:10.11959/j.issn.1000-436x.2017038

Abstract

Abstract:

Pilot contamination is appeared in massive MIMO (multiple input multiple output) system when using the same pilot sequences at different cells to get the channel state information.It becomes a bottleneck problem of massive MIMO when the number of antenna goes infinite.In order to dealt with pilot contamination,a new TS-CSPA joint scheme was proposed.This scheme can mitigate pilot contamination by reduce the reuse of pilot sequence through the time domain and space domain.And the closed-form expression for the achieved rates and signal to interference plus noise ratio(SINR) to verify the advantages of the proposed scheme were given.Numerical results show that significant performance gains to mitigate pilot contamination problem compared to other methods.

Key words: massive MIMO, pilot contamination, spectral efficiency, channel estimate

CLC Number:

TP393

Xin-lei SONG,Lin YANG,Jia-liang DU. Pilot decontamination in massive MIMO system combining time-shifted and cell sectorization pilot assignment[J]. Journal on Communications, 2017, 38(2): 165-172.

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References 16

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参数	值
小区数L	7
每个小区的用户K	8
小区半径r/km	1.0
时延因子η	3.8
阴影衰落标准差σ _shadow/dB	8.0
导频序列长度τ	8
BS传输功率 p_f	15
UT传输功率 p_r	4

Pilot decontamination in massive MIMO system combining time-shifted and cell sectorization pilot assignment

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