A Direction of Arrival Estimating Method Based on Weighted Averaging STFD Matrices
Liao Gui-sheng · Radar Science and Technology · 2005
This paper presents an improved method of DOA estimation based on time-frequency distribution. The method chooses the uniform linear array as model, on the basis of designing the spatial time-frequency distribution matrix, selects time-frequency points on many energy ridges then weights and averages these points to estimate the DOA of the signal source. Weighted averaging used in this paper makes the high energy time-frequency points play more important role in matrix designing, and more efficiently suppresses the effect of the cross-terms and reinforces the diagonal performance, thus improves the precision and performance of DOA estimation. The simulations show the validity of the new method.