According to characteristics of wireless ultraviolet communications and channel model of the helicopter landing process, a method of wireless ultraviolet communication to assist helicopter landing system is designed with LED array structures. Based on the ultraviolet propagation characteristics in real space, the performance differences of wireless ultraviolet communication at various transmitting elevations and receiving elevations are explored in terms of path loss and signal-to-noise ratio. The proposed method is verified experimentally with solar blind ultraviolet LEDs and photomultiplier tubes as transmitting and receiving devices, and the path loss and the signal-to-noise ratio in the ultraviolet propagation are obtained. The results show that the performance of line-of-sight communication is the best, the communication performance with elevation lower than 30° is more applicable to actual situations, and that with the elevation higher than 30° degenerates rapidly.