US3965417A
Expired / Lapsed
US
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Coherent component magnitude detector
Assignee: United States Department of the Navy
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Filing: 1975-06-26
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Granted: 1976-06-22
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Expires: 1995-06-26
Abstract
Abstract The identification of random and coherent components of an unspecified sil wherein at least a pair of band pass filters, each having the same center frequency but different bandwidths, are employed to make the identification.
Inventors
- 👤 Donald R. Tompkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:56
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/16; G01R23/165; G01R29/00; G01R29/08; G01R29/0864; G01R29/0892
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A method of determining the existence of a coherent component of an unspecified signal comprising: a. receiving an unspecified signal; b. rejecting any unwanted frequency of the unspecified signal to provide a retained signal and a rejected signal; c. splitting the retained signal into a first and second part; d. passing said first part thru a first filter having a selected center frequency and an established quality factor to provide a first filter output signal; e. passing said second part thru a second filter having a center frequency identical to said first filter and an established quality factor different from said first filter to provide a second filter output signal; f. dividing said first filter output signal by said second filter output signal to provide a final signal indicative of the magnitude of the coherent component of the unspecified signal at the selected center frequency.
Claim 2
Independent Claim
145 words
A method of determining the existence of a coherent component of an unspecified signal comprising: a. receiving an unspecified signal; b. rejecting any unwanted frequency of the unspecified signal to provide a retained signal and a rejected signal; c. splitting the retained signal into a first and second part; d. passing said first part thru a first filter having a selected center frequency and an established quality factor to provide a first filter output signal; e. passing said second part thru a second filter having a center frequency identical to said first filter and an established quality factor different from said first filter to provide a second filter output signal; f. dividing said first filter output signal by said second filter output signal to provide a final signal indicative of the magnitude of the coherent component of the unspecified signal at the selected center frequency.
Claim 3
Dependent Claim
37 words
The method of determining the existence of the coherent component of the unspecified signal of claim 1 wherein the quality factor of the first filter is equal to two times the quality factor of the second filter.
Claim 4
Dependent Claim
45 words
The method of determining the existence of the coherent component of the unspecified signal of claim 1 further comprising: changing the center frequency of the first and second filters so that said final signal indicates the magnitude of the coherent component at the changed frequency.
Claim 5
Dependent Claim
23 words
The method of determining the existence of the coherent component of the unspecified signal of claim 1 further comprising: displaying said final signal.
References Cited (Backward Citations)
US2834879A
Cited
US3858117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |