Theoretical Assessment of the Effect of Sunlight on Anti-unmanned Arial Vehicle LiDAR Early Warning System (A-UAV LEWS)
Y.B. Li and L.Y. Tang
Aiming at the problem of sunlight interference on the anti-unmanned arial vehicle LiDAR early warning system (A-UAVs-LEWS) a solution is proposed based on the laser ranging equation. The relationship between the response optical power of the laser receiver and the warning distance is given and the relationship between the sunlight background noise and the sunlight incident angle is calculated and analysed. The results show that under all-sunlight interference, the sunlight noise power decreases with the increase of the sunlight incidence angle, but the effect is little. Under part-sunlight interference the sunlight noise power decreases sharply with the increase of the sunlight incident angle. The sunlight interference cannot be ignored until the incident sunlight is about to remove the field of view of the receiver. The research results of this paper can lay a theoretical foundation and provide data basis for the design and development of A-UAVs-LEWS.
Keywords: LiDAR, unmanned aerial vehicle (UAV), early warning system, laser ranging equation, solar spectrum, sunlight interference, signal-to-noise ratio (SNR)