Broadband array processing using signal enhancement approach

A new algorithm is proposed for resolving multiple broadband incoherent sources incident on a uniform linear array. The proposed method does not require any initial estimates for finding the focusing transformation matrix, while the coherent signal-subspace method (CSM) proposed by Wang and Kaveh (1985) requires preliminary estimates of multigroup source location. This approach is found to provide superior performance relative to that obtained with the CSM method in terms of bias of direction-of-arrival (DOA) estimates. Several simulation results are shown to illustrate the performance of the proposed method compared with that of the CSM.