路径损耗是评估系统传输性能的重要参数,基于非直视非共面紫外光单次散射传输模型,采用遍历微元法对移动场景下无线紫外光通信单次散射路径损耗进行仿真,分析收发端几何参数以及收发节点相对位置变化对系统路径损耗的影响。结果表明:路径损耗在除180°方向外的其余方向上随着接收端移动距离的增大而增大;随着收发仰角增大,路径损耗增大,发射端仰角对路径损耗的影响更为显著;当视场角较大时,发散角变化对路径损耗的影响不大,而视场角的变化在非共面情况且移动距离较大时对路径损耗的影响较为明显,其余情况下则影响不大。

Path loss is an important parameter to evaluate the transmission performance of the system. Based on the non-line-of-sight non-coplanar ultraviolet single-scatter transmission model, the traversing tiny unit method (TTUM) is used to simulate the single-scatter path loss of wireless ultraviolet communication in mobile scenes, and the influence of the geometric parameters of the transceiver and the relative position change of the transceiver node on the path loss of the system is analyzed. The results show that path loss increases with the increase of the moving distance of the receiver in the other directions except 180°; with the increase of transceiver elevation angle, path loss increases, and the effect of transmitter elevation angle on path loss is more significant; when the field of view angle is large, the change of beam divergence angle has little effect on path loss, and change of field of view angle has a more obvious effect on path loss in non-coplanar case and large moving distance, while it has little effect in other cases.