Abstract:

A new signal processing technology based on single vector hydrophone was proposed. The method equivalently constructs a virtual aperture of a half wavelength distance uniform linear array from a single vector hydrophone by decomposing the timedomain sample data of different channels of the hydrophone. Compared with a single vector hydrophone, the virtual array has a narrower space beam. Azimuth of spatial target can be estimated using the virtual array snapshots for wideband or narrowband signal in frequency domain or time domain. The new method is robust for no need of a correction of array manifold. The theoretic amalysis and the computer simulation show that the new algorithm has a better performance of estimating a narrowband or wideband signal in the isotropic noise field compared to single vector hydrophone MUSIC algorithm.

Key words:  information processing, single vector hydrophone, DOA estimation, time-space transform