LED Array Positioning and Correction in UAV-Ground Communication

摘要

Light emitting diode (LED) is widely used in the field of optical communications because of its low power consumption and high flicker frequency. Due to the advantages of low power consumption, many LEDs can be integrated into one array and provide higher luminous intensity. In addition, combining light intensity with space coordinates can be utilized for positioning by unmanned aerial vehicle (UAV)-ground communication based on visible light communication link. The precise positioning of the LED array is an important factor for UAV-ground communication. In this paper, we propose and implement a two-step positioning method for precise positioning which can be used for UAV-ground communication. The method uses the OpenCV library and it corrects possible tilting defects in the image and achieves effective positioning of specific points in the array. This method could provide a positioning method for safe landing for UAV.