DOA estimation for scattering model based on binomial distribution
Sijun Wu · Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University · 2006
Using a beamforming algorithm based on direction of arrival(DOA) estimation is a key technique employed by so-called smart antennas. However,the algorithm has shortcomings because spatial resolution is insufficient,the computational effort is significant,sensitivity to noise is not ignored,and the spatial spectrum peaks search is fuzzy.Offered here is a simplified original discrete distribution to binomial distribution and a scattering model of the macro-cell.Utilizing the mathematical model of binomial distribution according to second order statistics provides an efficient estimate of the spatial arrival of the angle and the angle spread.This method provides a closed-form solution and reduces the computational load of DOA estimation.The calculations are not sensitive to white noise with equal-variance.Theoretical analysis indicates very high estimation accuracy of this closed-form solution and computer simulation verifies the efficiency of the algorithm.