System for canceling interferers from broadband active sonar sig

Details System for canceling interferers from broadband active sonar sig System for canceling interferers from broadband active sonar sig

1999-03-04

2000-05-02

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367119, 367905, G01S 1500

Patent

active

060580755

ABSTRACT:
An adaptive beamforming system for broadband sonar with a convergence time on the order of the pulse duration and effective interference nulling capabilities which enhance desirable echoes. The method uses an element based time implementation algorithm in which beam data that is formed in the direction of each interferer is successively subtracted from the element data using an adaptive FIR filter. The system can be applied to impulsive source sonar data and passive sonar data.

REFERENCES:
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Anderson, V.C., "Side Lobe Interference Suppression with an Adaptive Null Processor", JASA vol. 69, pp. 185-190, 1981.
Cox, H., Zeskind, R., Owen, M., "Robust Adaptive Beamforming", IEEE Trans. ASSP, vol. ASSP-35, No. 10, pp. 1365-1376, 1987.
Hudson, J.E., "Adaptive Array Principles", New York: Peter Peregrinus for IEE, 1981, pp. 59-81.
Monzingo, R.A., Miller, T.W., "Introduction to Adaptive Arrays", New York: Wiley & Sons, pp. 293-313, 1980.
Owlsey, N., Abraham, D.A., "Beamforming with Dominant Mode Rejection", CH2858-9/90/0000-0470 IEEE, 1990.
Owsley, N., "Enhanced Minimum Variance Beamforming", in Underwater Acoustic Data Processing, Ed. Y.T. Chan, Kluwer Academic Publishers, 1989.
Vural, A.M., "A Comparative Performance Study of Adaptive Array Processors", IEEE ICASSP 1977 Rec. May 1977, pp. 695-700.
Adams, S.L., Nolte, L.W., "Bayes Optimum Array Detection of Targets of Known Location", J. Acoust. Soc. Am., vol. 58, No. 3, pp. 656-669, Sep. 1975.

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