无线紫外光非直视通信中，大气散射和收发角度是影响紫外光通信系统性能的重要因素。在无线紫外光非直视通信单次散射模型的基础上，提出了一种适合于紫外光非直视通信的信噪比和信道容量估算方法，并将该方法与量子极限法进行对比计算，验证了无线紫外光通信信道容量估算法的正确性。利用计算机仿真了收发端角度对紫外光通信中路径损耗、信道容量的影响，并分析了不同背景噪声环境下的信道容量。仿真结果表明，发送、接收仰角及接收视场角对紫外光通信中的路径损耗、信道容量影响较大，而发散角对其影响不大，且信道容量随背景噪声的增大而减小。

In the field of wireless ultraviolet non- line- of- sight communication, atmospheric scattering and the angle of transceiver are important factors thoes affect the ultraviolet (UV) communication system performance. Based on the single scattering model of UV non- line- of- sight (NLOS) communication, a signal noise ratio (SNR) and channel capacity estimation method of UV NLOS communication is proposed. Then the estimated SNR and quantum- limited SNR as well as their channel capacities are calculated respectively. Comparing between two simulation results, the correctness of the method is verified. In addition, the path loss and channel capacity of UV NLOS communication under different angles of transmitter and receiver are simulated by using computer. Channel capacity under different background noise conditions is also analyzed. The simulation results show that transmitter elevation angle, receiver elevation angle and receiver field of view angle (FOV) have a great influence on the path loss and channel capacity of UV communication. Conversely, transmitter beam divergence angle has little impact on them, and channel capacity decreases as background noise increases.