基于数字高程模型的起伏地形对紫外光非直视通信的路径损耗  

Path Loss of Ultraviolet Non-Line-of-Sight Communication in Rugged Terrain Based on Digital Elevation Model

作　　者：冯克涛 李晓毅 吴乐华 钱璇[2] 王申涛 陈谋 李梦如 李昆仑 Feng Ketao;Li Xiaoyi;Wu Lehua;Qian Xuan;Wang Shentao;Chen Mou;Li Mengru;Li Kunlun(Communication Sergeant School,Army Engineering University,Chongqing 400035,China;National Astronomical Observatory,Chinese Academy of Sciences,Beijing 100101,China;Unit 78092 of PLA,Chengdu,Sichuan 610036,China)

机构地区：[1]陆军工程大学通信士官学校,重庆400035 [2]中国科学院国家天文台,北京100101 [3]中国人民解放军78092部队,四川成都610036

出　　处：《光学学报》2022年第6期143-156,共14页Acta Optica Sinica

基　　金：军内科研项目(KYCQJWJK1703)。

摘　　要：针对起伏地形环境下紫外光非直视通信路径损耗大、站点选址难的问题,提出了基于数字高程模型(DEM)的紫外光非直视传输的最佳收、发仰角求解方法。依托紫外光非直视单次散射模型,研究了路径损耗与收、发仰角之间的关系。针对不同地形原始DEM数据,通过插值提高分辨率,并提出了切线传输方案。采用顺序遍历法对收、发端位置及仰角变化对通信系统路径损耗的影响进行了研究。仿真结果表明,路径损耗在[10°,80°]收、发仰角区间内为增函数。在使用反距离加权插值法提高数据分辨率后,路径损耗值相较原始数据分别降低了0.014 dB、0.043 dB和0.385 dB。当按切线传输方案布设时,通信系统路径损耗值最小,设计的仿真程序可为收、发端站点科学布设提供支持。Aiming at the problems of large path loss and difficult site selection of ultraviolet non-line-of-sight communication in rugged terrain environment,a method for solving the optimal receiving and transmitting elevation angles of ultraviolet non-line-of-sight transmission based on a digital elevation model(DEM)is proposed.Based on the ultraviolet non-line-of-sight single scattering model,the relationship between path loss and receiving and transmitting elevation angles is studied.Aiming at the original DEM data of different terrains,the resolution is improved by interpolation,and the tangent transmission scheme is proposed.The influences of the positions and elevation changes of the receiver and transmitter on the path loss of the communication system are studied by using the sequential traversal method.The simulation results show that the path loss is an increasing function of the receiving and transmitting elevation angles in the range of[10°,80°].After using the inverse distance weighted interpolation method to improve the data resolution,the path loss is reduced by 0.014 dB,0.043 dB,and 0.385 dB,respectively,compared with the original data.When it is arranged according to the tangent transmission scheme,the path loss of the communication system is minimal,and the designed simulation program can provide support for the scientific layout of the receiving and transmitting stations.

关 键 词：光通信 紫外光 单次散射模型 起伏地形 路径损耗 

分 类 号：TN929.12[电子电信—通信与信息系统]