Communications – electrical: acoustic wave systems and devices – Echo systems – Parametric sonar
Patent
1985-04-15
1987-10-27
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Echo systems
Parametric sonar
367 99, 367100, 364516, 364724, G01S 966, G01S 968
Patent
active
047034629
ABSTRACT:
The 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.
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Pihulic Daniel T.
Sanders Associates Inc.
Seligman Richard I.
Tarcza Thomas H.
Weinstein Stanton D.
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