Two-dimension angle estimation based on spatial time-frequency analysis

In this paper, we propose a 2-dimension bearing estimation method based on spatial time-frequency analysis. We generalize spatial power spectrum based on wavelet transform (SPS-WT) to 3-dimension space. By analyzing the relationship between the wavelet transform of the frequency invariant beam's output and the array's beampattern, we derived SPS-WT in 3-dimension space. The method has good performance on noise suppression by utilizing the statistical uncorrelation character between signals and noise, and also has high resolution on bearing estimation. The performance of the proposed method is illustrated in simulation results.