Broadband direction-of-arrival estimation based on Khatri-Rao subspace and propagator method
Xiaodong Li · Applied Acoustics · 2012
A new direction-of-arrival(DOA) estimation method is proposed for uncorrelated wideband sources based on Khatri-Rao(KR) subspace and the propagator method.The proposed method transforms the covariance matrices of different frequency bins into a higher dimensional matrix through KR product,and then the propagator method is applied to estimate the DOA.The complexity of the proposed method is between Focusing Khatri-Rao subspace method(FKR) and coherent signal-subspace method(CSM).The performances of these wideband methods are investigated through computer simulations and experiments.The results show that the root mean square error of DOA estimation from the proposed method is similar to FKR and much lower than CSM.