Abstract:

In order to analyze the characteristic of turbulence, detect the signal of turbulence efficiently and further research  the influence of the ground clutter on detecting turbulence, the corresponding turbulence model is established. The wind  speed and spectral width of the turbulence echo signal are computed and simulated by using the fast Fourier transform  (FFT) algorithm. A new FFT algorithm used for turbulence signal processing is proposed,where the wind velocity and  spectrum width of the turbulence, the minimum signal detection threshold and relevant variables are newly defined. The  simulation results show that the wind speed of turbulence has a pulsative feature, and the FFT algorithm can perfectly  estimate the distribution of wind speed in the wind field of turbulence. The wind speed and spectral width of the echo  signal of turbulence under a nonground clutter condition are superior to that with ground clutter conditions.