12:00 PM - 12:15 PM
[MIS29-12] Low-altitude Velocity Field Estimation in Doppler Radar
Keywords:Doppler Radar, Minimum Mean Square Error, Doppler Spectrum
The most common method of calculating Doppler spectrum is Fast Fourier Transform (FFT) method, but there is a problem in FFT method. In Low-altitude observation influence of clutters such as mountains and buildings increases. In such circumstance spectral side-lobe level is high, and weather signal is buried and cannot be extracted by conventional filtering process. In this research, we proposed Minimum Mean Square Error(MMSE) method as a new method of calculating Doppler spectrum to solve the problem. We verified accuracy of the new method by simulation and presented results of applying this method to observational data. In the result, it was found that MMSE method solved the problem of FFT method and enabled to extract weather signal by reducing side-lobe. Therefore, MMSE method is effective as a spectral calculation method for Low-altitude observation.