电波传播特性测量系统研究  

Research on Measuring System of Radio Wave Propagation Characteristics

作　　者：孙玉玺 朱欣婷 任杰[2] 曹志伟 SUN Yuxi;ZHU Xinting;REN Jie;CAO Zhiwei

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266000 [2]北京交通大学,北京100044

出　　处：《铁道通信信号》2023年第2期32-40,共9页Railway Signalling & Communication

基　　金：山东省重点研发计划重大科技创新工程(2020CXGC010202)。

摘　　要：准确地信道测量以获取电波传播特性,对于磁浮列车的正常通信及安全运行具有重要意义。电波传播多径测量的难点在于解决同步问题,以及在区分多径的基础上测量信号幅度,而现有的商用测量仪器设备体型较大且价格昂贵,不利于进行现场测量。通过对探测序列进行调制解调,并利用多天线方向性特点,提出一种新的电波传播特性测量方案,并采用MATLAB软件进行仿真,验证了该方案的可行性。根据测量方案,利用软件无线电可编程和灵活性高等优势,结合硬件开发板,搭建了电波传播特性测量系统进行实际信道测量,能够满足电波传播特性的测试需求。Accurate channel measurement to obtain radio wave propagation characteristics is of great significance for the normal of radio communication and safe operation of the maglev train.The difficulty of multipath measurement of radio wave propagation lies in the problems of solving synchronization and measuring signal amplitude on the basis of distinguishing multipath,and the practical problems that the existing commercial measuring instruments are large in size and expensive in price,which is not conducive to on-site measurement in working scenes.Through the design of the detection sequence and the use of the directivity of multi-antenna,the radio wave propagation measurement scheme is designed,whose feasibility is verified by MATLAB simulation.According to the scheme,the radio wave propagation measurement system is built to measure the radio propagation characteristics based on the advantages of software radio programmability and high flexibility,combined with the hardware development board,which can meet the test requirements of radio propagation characteristics.

关 键 词：磁浮列车 电波传播 多径测量 波达方向 软件无线电 多天线技术 

分 类 号：TN92[电子电信—通信与信息系统]