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研究了空间角度对无线紫外光非视距(UV-NLOS)通信系统连通概率的影响。仿真分析了500个节点均匀分布的网络处于1-连通状态时收发仰角对网络性能的影响,并分析了OOK和PPM调制方式下网络节点密度、通信覆盖范围、数据传输速率和发送功率等网络性能参数。结果表明,网络处于1-连通状态时,PPM调制方式能获得比OOK调制方式更好的网络连通性能;相同调制方式下,定向发送-垂直接收比垂直发送-垂直接收场景下网络性能更佳;定向发送-定向接收场景下,收发端仰角均为小角度时各网络连通效果更好。
The influence of spatial angle on the connectivity probability of wireless UV-NLOS communication system is studied. The influence of sending and receiving elevation angles on the network performance when the network with 500 nodes are uniformly distributed in the 1-connected state is simulated and analyzed. The network performance such as network node density, communication coverage, data transmission rate and transmission power under OOK and PPM modulation modes is analyzed parameter. The results show that when the network is in the 1-connected state, the PPM modulation scheme can achieve better network connectivity than the OOK modulation scheme. In the same modulation scheme, the directional transmission-vertical reception-vertical transmission-vertical reception network performance is better; Directional sending - In the scenario of directional reception, the network connectivity is better when both the receiving and sending end elevation angles are small angles.