OTA MIMO测试的发展与应用  

Development and Applications of OTA MIMO Test

作　　者：李俊 漆一宏 刘列 于伟 沈鹏辉 Li Jun;Qi Yihong;Liu Lie

机构地区：[1]深圳市通用测试系统有限公司

出　　处：《安全与电磁兼容》2021年第5期66-71,共6页Safety & EMC

摘　　要：多输入多输出(MIMO)技术是4G LTE和5G系统的重要技术之一。随着5G通信频率以及通信带宽的的提升,宽带信号在传播链路中幅度和相位不平坦度将引入更大的MIMO空口(OTA)测量不确定性;另外大尺寸无线终端也面临MIMO测量方法选择的问题。为解决这两个问题,文章介绍了MIMO信道模型以及MIMO吞吐率的OTA测试方法:混响室法(RC)、多探头法(MPAC)、辐射两步法(RTS),并比较了不同方法的物理原理和应用差异,提出了基于RTS方法的小耦合箱宽带MIMO测试方法和基于机械臂的大型被测件MIMO测量方法,以指导工程师选择适合的方法进行无线终端的MIMO评估。Multiple input multiple output(MIMO)is one of the important technologies of 4G LTE and 5G systems.With the increase of 5G communication frequency and communication bandwidth,the effects of amplitude and phase unevenness in wideband signals during the signals propagation will introduce measurement uncertainty in MIMO performance evaluation.In addition,large-size wireless terminals also face the problem of choosing proper MIMO measurement methods.In order to solve these problems,this paper introduces the MIMO channel model and MIMO throughput measurement methods:the reverberation chamber method(RC),the multi-probe anechoic chamber(MPAC)method and the radiated two-step(RTS)method,in addition,the physical principles and application differences of the these methods are also compared.A small coupling box broadband MIMO measurement method based on RTS method and a robot arm-based MIMO measurement method for large devices are proposed to guide engineers to select suitable methods for MIMO evaluation of wireless terminals.

关 键 词：空口测试 多输入多输出 多探头方法 辐射两步法 

分 类 号：TN929.5[电子电信—通信与信息系统]