A modified method of extended towed array algorithm

A modified array extension method based on extended towed array measurements method is proposed to overcome restriction on the positions of the overlapped hydrophones.In this paper,towed array is extended by using more snapshots and compensating phase differences obtained by aperture domain averaging of phase differences from an overlap correlator.So phase correction factors in the proposed method can be estimated without restriction on the positions of the overlapped hydrophones and information of the target.Results of simulation and experiment show that the proposed method can improve ability of estimation.This method achieved better angular resolution than extended towed array measurements method in signal with low signal-noise-ratio condition.