摘要
为了准确描述输电环境中巡检无人机与地面基站之间无线信道,采用随机几何建模法,提出一种基于随机几何的三维信道模型。在该模型中考虑输电线路环境中塔杆,输电线的影响,采用水平圆柱体描述输电设备和周围环境的散射体分布情况,为了防止输电线路产生的电磁场影响无人机巡检作业安全,在模型中设置安全飞行区域,保证巡检安全。针对提出的信道模型,推导并分析了了空-时相关函数,多普勒功率谱密度,电平交叉率和平均衰落时间等信道统计特性。研究了散射体分布情况,无人机运动状态对信道统计特性的影响。仿真结果表明,无人机运动速度大小、飞行方向,散射体分布情况对信道影响显著。理论结果和仿真结果吻合良好,验证了所提模型的正确性和有效性,可以为输电线路场景下巡检无人机与地面基站之间的无线通信系统设计提供理论参考。
In order to accurately describe the wireless channel between the inspection UAV and GBS in the power transmission environment,we propose a three-dimensional channel model based on GBSM.The influence of tower poles and transmission lines in the transmission line environment is considered.The horizontal cylinders are used to describe the scatterer distribution of transmission equipment and the surrounding environment.In order to prevent the electromagnetic field generated by the transmission line from affecting the safety of UAV inspection operations,a safe flight area is set up in the model to ensure the safety of inspections.For the proposed channel model,channel statistical characteristics such as space-time correlation function,Doppler power spectral density,envelope level crossing rate and average fade duration are derived and analyzed.The influence of scatterer distribution and UAV motion status on channel statistical characteristics was studied.The simulation results show that the UAV's speed,flight direction,and scatterer distribution have a significant impact on the channel.The theoretical results and simulation results are in good agreement,verifying the correctness and effectiveness of the proposed model,and can provide a theoretical reference for the design of wireless communication systems between inspection UAV and GBS in transmission line scenarios.
作者
韩东升
孙瑞彬
李然
Han Dongsheng;Sun Ruibin;Li Ran(Department of Electronic and Communication Engineering,North China Electric Power University,Baoding 071003,China;Hebei Province Electric Power Internet of Things Technology Key Laboratory,North China Electric Power University,Baoding 071003,China)
出处
《电子测量技术》
北大核心
2024年第3期175-186,共12页
Electronic Measurement Technology
基金
河北省省级科技计划(SZX2020034)项目资助。
