Virtually steerable parametric acoustic array
Patent 4703462 Issued on October 27, 1987. Estimated Expiration Date: 
April 15, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 15, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3324452 3913060 ARMA filter and method for designing the same Digital beamsteering for a parametric scanning sonar system Method and apparatus for remote tissue identification by statistical modeling and hypothesis testing of echo ultrasound signals Patent #: 4542744 InventorAssigneeApplicationNo. 06/723018 filed on 04/15/1985US Classes:367/92, Parametric sonar367/100, With correlation or matched filtering367/99, Distance or direction finding708/314Matched filter typeExaminersPrimary: Tarcza, Thomas H.Assistant: Pihulic, Daniel T. Attorney, Agent or FirmInternational ClassesG01S 15/00 (20060101)G01S 15/42 (20060101) AbstractThe invention concerns an application of linear system parameter estimation techniques to finite amplitude sonar devices, to extract fine grained angular position information about echo sources. The invention makes use of the fact that the waveform return by a reflecting object within the sonar's beam varies according to its relative angular position from the receiver, and a discovery that this variation may be fit to a linear system model using autoregressive estimation theory to extract the nature of the variation. In all cases, the information is extracted without the mechanical or electrical steering of the sonar transmitting beam.Other References
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