ENHANCED FORWARD-BACKWARD SPATIAL-FILTERING METHOD FOR DOA ESTIMATIONOF NARROW-BAND COHERENT SOURCES

The forward-only filtering approach first suggested by A. Moghaddamjoo (1991) to estimate the direction of arrival (DOA) of narrowband coher ent sources is further investigated. The authors propose and analyse a n improved method based on the application of a suggested forward/back ward spatial filtering scheme of an array vector. They show that this method significantly improves the signal resolution and they prove tha t their method requires fewer sensor elements than the other filtering approaches. The effectiveness of the proposed algorithm is also prove d in the general case of a mixed source scene consisting of fully corr elated (coherent) and partially correlated signals, Monte-Carlo simula tion experimental results that confirm the analysis are presented as w ell.