Patent USH1171H successfully refreshed from Google Patents.
USH1171H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardioid beamformer with noise reduction
Assignee: United States Department of the Navy
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Filing: 1990-12-21
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Granted: 1993-04-06
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Expires: 2010-12-21
Abstract
Abstract A method is provided for detecting and localizing acoustic sources. Acous signals are transmitted by a sonobuoy and return signals are received. Electrical signals, corresponding to the received return signals, are multiplexed and transmitted. The transmitted signals are received by a receiver which is separated from the transmitter. The receiver applies the received signal to a demultiplexer which is separate from the the receiver. The demultiplexer demultiplexes the applied signals to provide electrical signals to the cardioid beamformer representative of the sonar return signals.
Inventors
- 👤 Ricky M. Fillhart
- 👤 Donato M. Russo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:25
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/80; G01S3/802; G01S3/803
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
140 words
A method for detecting and localizing acoustic sources, comprising the steps of: (a) providing a plurality of first electrical signals representative of sonar signals; (b) receiving a plurality of second electrical signals representative of sonar return signals corresponding to said first electrical signals; (c) multiplexing said second electrical return signals; (d) transmitting said multiplexed electrical return signals; (e) receiving said transmitted multiplexed signals by multiplexed signal receiving means separate from said transmitting means; (f) applying, by said multiplexed signal receiving means, said received signals to demultiplexing means for demultiplexing of said signal to provide a demultiplexed signal; (g) applying a demultiplexed signal by signal line means, coupled to said demultiplexing means to cardioid means separated from said demultiplexing means; and, (h) processing said applied demultiplexed signal by said cardioid means to provide electrical signals representative of said sonar return signals.
Claim 2
Independent Claim
140 words
A method for detecting and localizing acoustic sources, comprising the steps of: (a) providing a plurality of first electrical signals representative of sonar signals; (b) receiving a plurality of second electrical signals representative of sonar return signals corresponding to said first electrical signals; (c) multiplexing said second electrical return signals; (d) transmitting said multiplexed electrical return signals; (e) receiving said transmitted multiplexed signals by multiplexed signal receiving means separate from said transmitting means; (f) applying, by said multiplexed signal receiving means, said received signals to demultiplexing means for demultiplexing of said signal to provide a demultiplexed signal; (g) applying a demultiplexed signal by signal line means, coupled to said demultiplexing means to cardioid means separated from said demultiplexing means; and, (h) processing said applied demultiplexed signal by said cardioid means to provide electrical signals representative of said sonar return signals.
Claim 3
Dependent Claim
25 words
The method for detecting and localizing acoustic sources of claim 1, wherein step (b) comprises receiving said second electrical signals by means of hydrophone means.
Claim 4
Dependent Claim
26 words
The method for detecting and localizing acoustic sources of claim 2, wherein step (b) comprises receiving said second electrical signals by means of a hydrophone array.
Claim 5
Dependent Claim
27 words
The method for detecting and localizing acoustic sources of claim 3, wherein step (b) comprises receiving said second electrical signals by means of a three-dimensional hydrophone array.
Claim 6
Dependent Claim
23 words
The method for detecting and localizing acoustic sources of claim 3, wherein at least one hydrophone of said array is an omnidirectional hydrophone.
Claim 7
Dependent Claim
22 words
The method for detecting and localizing acoustic sources of claim 5, wherein at least one hydrophone of said hydrophone array is directional.
Claim 8
Dependent Claim
34 words
The method for detecting and localizing acoustic sources of claim 6, comprising the further step of determining the direction of at least one of said sonar return signals by means of said directional hydrophone.
Claim 9
Dependent Claim
19 words
The method for detecting and localizing acoustic sources of claim 1, wherein step (i) comprises combining said demultiplexed signals.
Claim 10
Dependent Claim
25 words
The method for detecting and localizing acoustic sources of claim 8, wherein said combining of said demultiplexed signals comprises adding and substracting said demultiplexed signals.
Claim 11
Independent Claim
149 words
A system for detecting and localizing acoustic sources, comprising; means for providing a plurality of first electrical signals representative of sonar signals; first means for receiving a plurality of second electrical signals representative of sonar return signals corresponding to said first electrical signals; means for multiplexing said second electrical return signals; means for transmitting said multiplexed electrical return signals; second means for receiving said transmitted multiplexed signals, said first receiving means being separated from said transmitting means; means, coupled to said first receiving means, for applying said received signals to demultiplexing means for demultiplexing of said signal to provide a demultiplexed signal; signal line means coupled to said demultiplexing means, for applying said demultiplexed signal to cardioid means separated from said demultiplexing means; and means within said cardioid means for processing said applied demultiplexed signal by said cardioid means to provide electrical signals representative of said sonar return signals.
Claim 12
Independent Claim
149 words
A system for detecting and localizing acoustic sources, comprising; means for providing a plurality of first electrical signals representative of sonar signals; first means for receiving a plurality of second electrical signals representative of sonar return signals corresponding to said first electrical signals; means for multiplexing said second electrical return signals; means for transmitting said multiplexed electrical return signals; second means for receiving said transmitted multiplexed signals, said first receiving means being separated from said transmitting means; means, coupled to said first receiving means, for applying said received signals to demultiplexing means for demultiplexing of said signal to provide a demultiplexed signal; signal line means coupled to said demultiplexing means, for applying said demultiplexed signal to cardioid means separated from said demultiplexing means; and means within said cardioid means for processing said applied demultiplexed signal by said cardioid means to provide electrical signals representative of said sonar return signals.
Claim 13
Dependent Claim
24 words
The system for detecting and localizing acoustic sources of claim 10, wherein said first means for receiving said first electrical signals comprises hydrophone means.
Claim 14
Dependent Claim
19 words
The system for detecting and localizing acoustic sources of claim 11, wherein said hydrophone means comprises a hydrophone array.
Claim 15
Dependent Claim
20 words
The system for detecting and localizing acoustic sources of claim 12, wherein said hydrophone array comprises a three-dimensional hydrophone array.
Claim 16
Dependent Claim
24 words
The system for detecting and localizing acoustic sources of claim 13, wherein at least one hydrophone of said hydrophone array comprises an omnidirectional hydrophone.
Claim 17
Dependent Claim
22 words
The system for detecting and localizing acoustic sources of claim 14, wherein at least one hydrophone of said hydrophone array is directional.
Claim 18
Dependent Claim
29 words
The system for detecting and localizing acoustic sources of claim 15, further comprising means for determining the direction of said sonar return signals by means of said directional hydrophone.
Claim 19
Dependent Claim
26 words
The system for detecting and localizing acoustic sources of claim 10, wherein said means for processing said demultiplexed signal comprises means for combining said demultiplexed signals.
Claim 20
Dependent Claim
26 words
The system for detecting and localizing acoustic sources of claim 17, wherein said means for combining said signal comprises means for adding and subtracting said signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |