| 摘要 |
The invention relates to the measurement of the speed of an aircraft by Doppler laser anemometry, the aircraft being equipped with a LiDAR using coherent detection. According to the invention, the measurement method comprises the following steps: emission by the lidar of a laser beam, reception by the lidar of a signal backscattered by particles present in the path of the beam emitted and generation of the corresponding heterodyne signal, processing of the heterodyne signal by the processor unit which comprises the following sub-steps: time-frequency analysis of the heterodyne signal, estimation of the speed of the aircraft based on the time-frequency analysis, wherein the step for processing the heterodyne signal comprises a statistical test sub-step with: estimation of a statistical function from the TFR of the heterodyne signal, estimation of a reference statistical function from the TFR of the noise associated with the heterodyne signal, calculation of a difference between the statistical function from the TFR of the heterodyne signal and the reference statistical function from the TFR of the noise. |
