信息通信技术与政策

信息通信技术与政策

信息通信技术与政策 ›› 2022, Vol. 48 ›› Issue (10): 79-86.doi: 10.12267/j.issn.2096-5931.2022.10.012

技术与标准 上一篇    下一篇

面向毫米波大规模天线的OTA性能测试方法研究

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

孙浩, 吴翔, 潘冲   

  1. 中国信息通信研究院移动通信创新中心,北京 100191
  • 收稿日期:2022-06-27 出版日期:2022-10-15 发布日期:2022-11-01
  • 通讯作者: 潘冲
  • 作者简介:
    孙浩 中国信息通信研究院移动通信创新中心助理工程师,主要研究方向为信道测量、 OTA性能和射频测试等|吴翔 中国信息通信研究院移动通信创新中心高级工程师,主要研究方向为5G、车联网的射频、天线、OTA等

SUN Hao, WU Xiang, PAN Chong   

  1. Mobile Communications Innovation Center, China Academy of Information and Communications Technology, Beijing 100191, China
  • Received:2022-06-27 Online:2022-10-15 Published:2022-11-01
  • Contact: PAN Chong

摘要:

以面向毫米波大规模多输入多输出天线的空口(Over-The-Air,OTA)测试为研究背景,旨在探究毫米波信道的重要特征对OTA测试系统的影响,以便研究与之相匹配的OTA测试系统架构和毫米波信道重构算法,进而准确评估毫米波设备的系统性能。不同于Sub-6 GHz频段的OTA测试,通过分析毫米波信道的几个重要特征,进而分析其对毫米波OTA测试系统和信道重构方法带来的影响;阐述了两种现有的毫米波OTA测试系统模型及其实现原理,并对其各自存在的问题进行了分析;最后讨论了采用空间相关性作为毫米波信道重构准则存在的问题,进而分析了采用空间谱作为毫米波信道重构准则的优势,并就重构动态毫米波信道时如何快速获得任意时刻的OTA探头权重提出构想。

关键词: 波束赋形, 毫米波信道, 空口测试, 空间相关性

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

中图分类号: