US5309378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-channel adaptive canceler
Assignee: Raytheon Co
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Filing: 1993-03-30
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Granted: 1994-05-03
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Expires: 2013-03-30
Abstract
Abstract Disclosed is an adaptive canceler in which a pipelined approach is used wherein reference signals are divided into two or more sections having concurrent weight adjustment. This architecture allows the speed of adaptive cancellation to be increased and/or the number of reference taps to be increased without loss of cancellation speed. Once a continuous stream of digital data has been established in this architecture, the speed of the adaptive processor is limited only by approximately the processing time of the slowest element. The noise canceled signal may then be converted to the frequency domain in a fast Fourier transform device.
Inventors
- 👤 Robert T. Beierle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:31
CPC Classifications
G; G01; G01M; G01M13/00; G01M13/02; G01M13/028; G10; G10K; G10K11/00; G10K11/16; G10K11/175; G10K11/178; G10K11/1781; G10K11/17821; G10K11/17823; G10K11/1785; G10K11/17853; G10K11/17854; G10K11/17855; G10K11/1787; G10K11/17873; G10K2210/00; G10K2210/10; G10K2210/108; G10K2210/30; G10K2210/301; G10K2210/3025; G10K2210/3031; G10K2210/3042; G10K2210/3045; G10K2210/3053; G10K2210/321; G10K2210/3214; G10K2210/50; G10K2210/503
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
An adaptive canceler apparatus comprising: primary signal sensor means for receiving a primary signal comprising a signal of interest generated by a device of interest and also comprising a first noise component; reference sensor means; and adaptive canceler means coupled to said primary signal sensor means and to said reference sensor means for adaptively combining said noise signals with said primary reference signal to provide a noise canceled signal comprising the signal of interest generated by the device of interest and a second noise component, said second noise component having a smaller amplitude than said first noise component. said adaptive canceler means comprising a first digital adaptive filter and a second digital adaptive filter coupled in series, said first digital adaptive filter performing a first number of weight adjustments based on feedback from said noise canceled signal to provide an intermediate output signal; said second digital adaptive filter receiving said intermediate output signal and performing a second number of weight adjustments based on feedback from said noise canceled signal to provide said noise canceled signal at the output of said adaptive canceler means, said noise canceled signal being one that has been adaptively weighted by said first and second number of weight adjustments.
Claim 2
Dependent Claim
203 words
An adaptive canceler apparatus comprising: primary signal sensor means for receiving a primary signal comprising a signal of interest generated by a device of interest and also comprising a first noise component; reference sensor means; and adaptive canceler means coupled to said primary signal sensor means and to said reference sensor means for adaptively combining said noise signals with said primary reference signal to provide a noise canceled signal comprising the signal of interest generated by the device of interest and a second noise component, said second noise component having a smaller amplitude than said first noise component. said adaptive canceler means comprising a first digital adaptive filter and a second digital adaptive filter coupled in series, said first digital adaptive filter performing a first number of weight adjustments based on feedback from said noise canceled signal to provide an intermediate output signal; said second digital adaptive filter receiving said intermediate output signal and performing a second number of weight adjustments based on feedback from said noise canceled signal to provide said noise canceled signal at the output of said adaptive canceler means, said noise canceled signal being one that has been adaptively weighted by said first and second number of weight adjustments.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-02 | 1997-11-01 | 1998-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-02 | 2001-11-01 | 2002-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-02 | 2005-11-01 | 2006-05-03 | $7700.00 | Window Closed / Lapsed |