Abstract: In this paper, two autoregressive (AR) spectral estimation approaches, i.e. Hanning data-adaptive weighted and Hanning weighted complex Burg approaches (CHDAB and CHB) are discussed. Their characteristics are as well as dataadaptive weighted Burg (DAB) technique, the best technique among other weighted Burg techniques. But our approaches are simpler and the first two AR parameters are easier to be estimated than the DAB technique. The CHDAB and CHB to estimate the spectra of doppler sodar signal have been used, in the caseof single-peak in spectrum, the results are better than the FFT's obviously.