中文摘要：

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。

英文摘要：

This paper studies the network performance parameters with ditterent no-line-ot-slgnt （NLOS） communication modes. According to the different transceiver elevations,the UV communication network connectivity probabilities with the different modulation methods and the path loss models are considered. The network performance parameters with different transceiver elevations are simulated in a wireless UV NLOS I-connected network with uniformly distributed 500 nodes. The node density, corn munication coverage range, data rate and transmission power with on-off keying （OOK） and pulse position modulation （PPM） are analyzed. In the 1-connected UV network, the simulation results show that the network performance parameters with PPM are better than those with （X）K. The network performance parameters of directional transmitting-vertical receiving is better than those of vertical transmittingvertical receiving in the same modulation mode. When the transceiver elevation angles of connected net- work are larger than 40° with directional transmitting-directional receiving,the changes of network connectivity performance parameters are not obvious. In addition, the network has optimum performance pa- rameters with small transceiver elevation angles.