不同山地坡度条件下的太赫兹信号特性研究

Study on terahertz signal characteristics under different mountain slope conditions

摘要:

山地环境通常具有多样化地形，针对山地无线通信中由于地形遮挡导致信号传播路径复杂的问题，提出了基于不同山地坡度下的太赫兹无线通信建模方法。通过数字高程模型(DEM)获取地形数据，结合射线追踪法，引入坡度因子对山地太赫兹信号传播特性进行分析；对接收器的接收功率进行仿真实验，建立地形坡度和接收功率的量化关系。仿真结果表明，不同坡度区域在信号覆盖和时延特性方面存在显著差异：山地中较平坦的区域通常具有更稳定的信号覆盖，功率值分布较集中(-172.5~-117.5 dBm)；而在陡峭坡度区域，信号覆盖表现不佳，功率分布较分散，但时延扩展分布较集中(0~3 ns)。

Abstract:

Mountainous environments typically feature diverse terrains. To address the issue of complex signal propagation paths in wireless communication due to terrain obstructions in mountainous areas, a modeling method for terahertz wireless communication under different mountain slopes is proposed. Terrain data is obtained through Digital Elevation Models(DEM), and the ray tracing method is combined with the introduction of a slope factor to analyze the propagation characteristics of terahertz signals in mountainous areas. Simulation experiments are conducted on the received power of the receiver to establish a quantitative relationship between terrain slope and received power. Simulation results indicate that there are significant differences in signal coverage and delay characteristics across regions with different slopes:flatter areas in the mountains generally have more stable signal coverage with a more concentrated power distribution(-172.5~-117.5 dBm); whereas in areas with steep slopes, signal coverage is poor, power distribution is more dispersed, but delay spread distribution is more concentrated (0~3 ns).