泄漏电缆的多天线矩阵建模  

Multi-antenna Matrix Modeling of Leakage Cable

作　　者：李冉[1] LI Ran(Xuzhou Vocational Technology Academy of Finance & Economics,Jiangsu Union Technical Institute,Xuzhou 221008,China)

机构地区：[1]江苏联合职业技术学院徐州财经分院信息技术系,江苏徐州221008

出　　处：《无线电工程》2019年第5期425-429,共5页Radio Engineering

摘　　要：对于信息化高度依赖的今天而言,面向地下矿山和隧道无线通信系统一直存在着可靠性不高的问题。泄漏电缆(LF)是地下轨道交通环境中应用最广泛的无线电波传输介质,其辐射槽根据所需工作信号波长而设计,具有辐射稳定衰减小等特点,起到了双向天线的作用。基于泄漏电缆传输理论,将其建模为具有多输入单输出(MISO)系统的多天线阵列来研究泄漏电缆槽口对辐射特性的影响。在假定二进制相移键控(BPSK)调制的各种条件下,通过仿真估算该MISO系统的接收信号情况。仿真结果可以看出,该泄漏电缆模型可以很好地匹配仿真结果,对泄漏电缆设计具有指导意义。People are significantly dependent on information technology at present.The wireless communication system used for underground mines and tunnels is unreliable.Leakage cable (LF) is a kind of radio wave transmission medium used widely in underground rail transit environment.Its radiation groove is designed according to the required working signal wavelength.It has the characteristics of low radiation stability attenuation,and acts as a two-way antenna.Based on the transmission theory of leaky cable,it is modeled as a multi-antenna array with multi-input single-output (MISO) system to study the influence of leakage cable slot on radiation characteristics.Under various conditions of assuming binary phase shift keying (BPSK) modulation,the received signal of the MISO system is estimated by simulation.The simulation results show that the leakage cable model can match the simulation results very well,which has guiding significance for the design of leakage cable in the future.

关 键 词：泄漏电缆 多输入单输出 二进制相移键控 衰减 信道增益 

分 类 号：TN913.32[电子电信—通信与信息系统]