面向风载作用的毫米波通信系统性能评估

Performance Evaluation of Millimeter Wave Communication System under Wind Load

风致振动会造成毫米波系统天线相对位置变化,导致辐射角度偏移,进而影响通信系统性能。针对风载荷的随机性,提出了一种面向风载作用的毫米波系统性能的创新评估方法,基于概率可靠度理论,以使用抛物面天线的某毫米波系统为研究对象,分别推导出了风速与系统中断概率以及信道容量的数学表达式。仿真计算结果表明,当系统天线装载于某19.2 m单管通信铁塔顶层,在平均风速15.8 m/s,信噪比容限为5,10和20 dB时系统的中断概率分别为97.45%,52.79%和2.54%,且信道容量退化概率随风速的增大而增加。该方法适用于5G毫米波自回传网络(mW-SBN)、微波中继系统和卫星通信系统可靠度和信道容量评估以及网络规划指导,具有重要的工程应用价值。

Wind-induced vibration will cause the relative position change of millimeter wave system antenna,resulting in the radiation direction angle deviation,and then affect the performance of communication system.An innovative evaluation method for communication performance of millimeter wave system under wind load is proposed in view of the randomness of wind load.This method is based on probabilistic reliability analysis,a millimeter wave system using parabolic antenna is studied,and the mathematical expression of wind speed and system interruption probability and the mathematical expression of wind speed and channel capacity are derived respectively.The simulation results show that the outage probability of the system is 97.45%,52.79%and 2.54%respectively when the system antenna is mounted on the top of a 19.2 m single tube communication tower,the average wind speed is 15.8 m/s and the SNR tolerance is 5,10 and 20 dB,and the probability of channel capacity degradation increases with the increase of wind speed.This method is suitable for the reliability,channel capacity evaluation and network planning guidance of 5G millimeter self-backhaul network(mW-SBN),microwave relay system and satellite communication system,and provides an important engineering application value.