低空传播模型的分析

Analysis of low altitude propagation model

随着无人机和低空交通设备的出现,低空场景下的网络规划和场强预测逐步引起关注。低空场景下往往都会伴随低速移动,这种场景下多普勒频移将造成能量损失,加大路径损耗。本文针对700 MHz和2.6 GHz两个频段建立低空传播模型,利用连续波发射机和低空无人机携带接收机,采样功率、经纬度和速度信息,对低空模型进行校正,建立低空模型。该模型可用于低空中低速场景下的网络规划。

With the emergence of unmanned aerial vehicles and low altitude transportation equipment, network planning and field strength prediction in low altitude scenarios have gradually attracted attention. Low altitude scenes are often accompanied by low-speed movement. In this scenario, Doppler frequency shift will cause energy loss and increase path loss. This paper establishes a low altitude propagation model for the 700 MHz and 2.6 GHz frequency bands, which includes the speed factor. Using CW transmitter and low altitude UAV receiver, sampling power, latitude and longitude and speed information, the low altitude model is corrected and established. This model can be used for network planning in low air and low speed scenarios.