5G射频性能评估中的EVM空口测试方法  

EVM OTA Test Methods in 5G Radio Frequency Performance Evaluation

作　　者：肖鹏晖 黎福海[2] 林斌[3] 漆一宏 刘列 Xiao Penghui;Li Fuhai;Lin Bin

机构地区：[1]深圳市通用测试系统有限公司 [2]湖南大学电气与信息工程学院 [3]深圳市计量质量检测研究院

出　　处：《安全与电磁兼容》2021年第3期35-40,共6页Safety & EMC

摘　　要：随着5G时代的到来,天线与射频接口高度集成,传统的传导测试已无法适应新一代无线通信设备的测试要求,越来越多的射频性能指标需要采用空口而非传导方式进行测试。以误差幅度矢量(EVM)为代表,射频性能指标对于传统的空口测试系统及方法提出了不同以往的要求。紧缩场、近远场变换等新系统被用于替代传统的远场测试系统。文章结合3GPP及近年的相关参考文献,介绍了几种5G射频性能测试的空口测试方法并做了比较,着重讨论了EVM的定义、测试流程和校准方法等问题,展望了射频性能测试的未来发展方向。With the advent of the 5G era,the antennas and radio frequency(RF)connectors are highly integrated.Traditional conduct testing can no longer meet the testing requirements of the new generation of wireless communication equipment.In RF performance index,more and more conduct tests are replaced by OTA test.Error Vector Magnitude(EVM),which evaluate the overall performance of the transmitter,also bring challenges to the traditional OTA test systems and methods.The traditional far field method is replaced by compact antenna test range and near field to far field transform method.Based on 3GPP and related references,this article mainly introduces few OTA test methods of 5G RF index before compare them with each other,with focus on the definition of EVM,test procedure and calibration method,as well as forecast of future development of RF performance test.

关 键 词：误差幅度矢量 5G测量 空中接口 射频性能 

分 类 号：TN929.5[电子电信—通信与信息系统]