Pilot Decontamination in Massive MIMO Systems based on Pilot Design and Allocation

doi:10.23940/ijpe.19.10.p22.27532761

Int J Performability Eng ›› 2019, Vol. 15 ›› Issue (10): 2753-2761.doi: 10.23940/ijpe.19.10.p22.27532761

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Pilot Decontamination in Massive MIMO Systems based on Pilot Design and Allocation

Jingwei Dong^*, Zhiyu Han, and Chuang Han

School of Measure-Control Technology and Communication Engineering, Harbin University of Science and Technology, Harbin, 150080, China

Submitted on ; Revised on ; Accepted on
Contact: Dong Jingwei
About author:
* Corresponding author. E-mail address: djw@hrbust.edu.cn
Supported by:
The authors would like to thank the Higher Educational Key Laboratory for Signal & Information Processing of Heilongjiang Province This work is financially supported by the National Natural Science Foundation of China (No 61601149) and Science Foundation of Heilongjiang Province (No QC2017074)

Abstract

Abstract:

Pilot contamination has become an important factor affecting the development of massive MIMO. To mitigate pilot contamination, a new scheme of joint polar coordinate pilot assignment and pseudo random code pilot design is proposed in this paper. The scheme allocates the pilot according to the size of the user's polar angle, which is marked with polar coordinates, and uses pseudo random codes with different time delays to add disturbance to users that share the same pilot sequence and users of neighboring cells so as to improve the accuracy of channel estimation. Through theoretical derivation and data simulation analysis of minimum mean square error (MMSE) channel estimation of the system, the scheme can significantly reduce the mean square error (MSE) of channel estimation and improve the signal-to-noise ratio and average transmission rate of uplink transmission. Thus, the adverse effect of pilot contamination on channel estimation is reduced, and the channel throughput is improved.

Key words: massive MIMO, pilot contamination, channel estimation, pilot sequence

Jingwei Dong, Zhiyu Han, and Chuang Han. Pilot Decontamination in Massive MIMO Systems based on Pilot Design and Allocation [J]. Int J Performability Eng, 2019, 15(10): 2753-2761.

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Pilot Decontamination in Massive MIMO Systems based on Pilot Design and Allocation

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