Sonar bearing estimation of extended targets

Details Sonar bearing estimation of extended targets Sonar bearing estimation of extended targets

1987-08-31

1999-09-07

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

G01S 1500

Patent

active

059497394

ABSTRACT:
An improved bearing estimation sonar system provides high resolution imaging of extended multi-highlight targets at long ranges. The complex outputs of a pair of offset-phase centered beams are first processed by segmented replica correlators to achieve pulse compression, followed by cross-correlation to provide high fidelity bearing estimates for target imaging. The technique exploits space-time coherence properties of the target receive signal to extract high resolution target information. The processing employed in the system also includes data editing schemes resulting in enhanced discernability of submarine-like targets which is essential for target classification. Substantial processing gains are realizable by the system of this invention.

REFERENCES:
patent: 4686655 (1987-08-01), Hyatt

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