Research on over-the-air performance testing methods for millimeter-wave massive MIMO

doi:10.12267/j.issn.2096-5931.2022.10.012

Abstract

Abstract:

In this paper, over-the-air (OTA) testing for millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) devices is taken as the research background, which aims to study the impact of charac-teristics of mmWave channels on the OTA testing system. Further, the suitaable algorithms for mmWave channel emulation and OTA testing system are studied to evaluate the performance of mmWave devices in the anechoic chamber. Unlike the OTA testing in the Sub-6 GHz frequency band, the specific characteristics of mmWave channels are analyzed successively, such as large bandwidth, sparsity, dynamic characteristics and spherical wavefront, and each of which will have a significant impact on the structure of the OTA testing system and the theory for channel emulation. Moreover, two kinds of system models and their implementation principles that can be used for the mmWave OTA testing are elaborated. Finally, the defects of mmWave channel emulation based on spatial correlation are discussed, and the significance and advantages of spatial spectrum based metric are also analyzed. Furthermore, how to quickly determine the probe weights at any time is proposed in this paper.

Key words: beamforming, mmWave channel, OTA testing, spatial correlation

CLC Number:

SUN Hao, WU Xiang, PAN Chong. Research on over-the-air performance testing methods for millimeter-wave massive MIMO[J]. Information and Communications Technology and Policy, 2022, 48(10): 79-86.

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URL:

http://ictp.caict.ac.cn/EN/10.12267/j.issn.2096-5931.2022.10.012

http://ictp.caict.ac.cn/EN/Y2022/V48/I10/79

Figures/Tables 3

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