基于TDM的大规模多天线信道测量系统的射频切换模块设计  

Ratio frequency switcher design of a massive MIMO channel sounder system based on time-division multiplexing

作　　者：吴钰浩 陶成[1,2] 刘留[1] 雷勇 刘妍 

机构地区：[1]北京交通大学宽带无线移动通信研究所 [2]东南大学移动通信国家重点实验室

出　　处：《电子测量与仪器学报》2018年第3期96-103,共8页Journal of Electronic Measurement and Instrumentation

基　　金：中央高校基本科研业务费专项(2017JBM306);北京市科技新星计划(Z161100004916068);国家自然科学基金面上(61471027);东南大学移动通信国家重点实验室开放研究基金(2017D01);北京市自然科学基金(4152043)资助项目

摘　　要：传统大规模多天线(Massive MIMO)信道测量系统采用的是虚拟大规模多天线阵列,测量周期较长,测试环境要求静止,同步要求高并且需要修正天线阵元间互耦特性。针对于传统测量系统的不足构建了真实Massive MIMO信道测量系统,该系统相对于传统信道测量系统的不同在于TDM的射频切换模块和相应的天线阵列。射频切换模块主要包括时钟控制单元和射频切换单元,时钟控制单元产生控制矢量信号发生器的触发信号和控制射频切换单元的控制信号,射频切换单元则根据输入的控制信号快速切换不同的天线阵元。实验表明,该套设备大大缩短了测量时间,减轻了人力测试强度,降低了对测试环境和同步的要求并且测量结果包含天线之间的互耦影响,极大的增加了信道建模的准确性。Traditional channel sounding system used virtual massive multiple-input multiple-output( MIMO) antenna element array,where the measurement duration is relatively long,the sounding environment needs to be static,and the mutual coupling needs to be corrected.To overcome shortcomings of the traditional sounding system,a massive MIMO channel sounding system is established. Compared with traditional channel sounding systems,the main differences are the Ratio frequency switcher and the realistic antenna array. The RF switcher includes a clock control unit and a RF switching unit. The clock control unit generates trigger signals to control the vector signal generator and controlling signals to control the RF switching unit. The RF switching unit is able to switch the different antenna elements rapidly. Experiment results show that the equipment greatly shortens the measurement duration,lighten labour intensity,reduces the requirements for sounding environment and synchronization. The mutual coupling among the antenna elements is maintained in the measurement data,greatly increasing the measurement accuracy of channel modeling.

关 键 词：信道测量 MASSIVE MIMO 射频切换模块 TDM 天线阵列 

分 类 号：TN919.3[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]