Design And Verification Of Echo Signal Algorithm For Coherent Doppler Wind Lidar

The wind information is an important parameter to the atmosphere.It plays an important role in the numerical weather forecast,meteorology and Climatology research,environmental monitoring and military aviation applications.Doppler wind lidar has the advantages of high accuracy,high resolution and fast speed.It has a wide range of applications,including the detection of airport wind and wind shear,turbulence detection and tracking,aircraft wake vortex detection.The wind shear detection is of great significance to improve the popularity of security.How to distinguish and improve the accuracy of the atmospheric wind field is the key point of this paper.In this paper,the coherent Doppler lidar echo signal is analyzed based on the background of related research projects.The method to calculate the carrier to noise ratio of the echo signal is proposed on the basis of the different denoising methods and the theory of carrier to noise ratio.The correctness of the algorithm is verified by the contrast experiment.The results show that the calculation method of the carrier noise ratio is available to different denoising methods.A new criterion for judging the validity of the signal is proposed based on the carrier to noise ratio in this paper.The new criterion can further reduce the effectiveness of the signal range.This will greatly improve the reliability of the wind field information.The wiper control function is put forward.It can effectively eliminate all kinds of interference,so as to ensure the normal operation of the laser lidar system.