Abstract:

Aiming at the problem that conventional blind source separation algorithms are not suitable for the broadband mixed signals, a new blind source separation algorithm based on the array model is proposed. The method of subband decomposition is adopted to realize the expansion of instantaneous complexvalued blind source separation methods under the broadband condition. Using the characters of the separating matrix and mixing matrix in array model, a new method based on direction of arrival (DOA) estimation for solving the scaling and permutation ambiguities is proposed. The simulation results show that the algorithm can not only separate broadband mixed signals effectively, but also recover the signals’ amplitude correctly.