US5440636A
Expired / Lapsed
US
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Apparatus and method for processing of frequency hopping communications
Assignee: SNHANDERS ASSOCIATES Inc A CORP OF DE
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Filing: 1987-02-27
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Granted: 1995-08-08
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Expires: 2007-02-27
Abstract
Abstract The present invention relates to signal processors and processing, and more particularly to apparatus and method for sensing, detection and/or demodulation of frequency hopping signals.
Inventors
- 👤 David L. Herrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:02
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/713
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
Apparatus for detecting a frequency hopping signal, comprising: an antenna; first means, operatively connected to said antenna, for transforming a signal from said antenna; second means, operatively connected to said first means, for detecting any frequency hopping in the transformed antenna signal; and third means, operatively connected to and responsive to said second means, for converting the any detected frequency hopping in the transformed antenna signal to a non-hopping signal having a predetermined center frequency.
Claim 2
Dependent Claim
75 words
Apparatus for detecting a frequency hopping signal, comprising: an antenna; first means, operatively connected to said antenna, for transforming a signal from said antenna; second means, operatively connected to said first means, for detecting any frequency hopping in the transformed antenna signal; and third means, operatively connected to and responsive to said second means, for converting the any detected frequency hopping in the transformed antenna signal to a non-hopping signal having a predetermined center frequency.
Claim 3
Dependent Claim
24 words
Apparatus as recited in claim 1 wherein said second means comprises means for timing the dwell of the transformed antenna signal at a frequency.
Claim 4
Dependent Claim
40 words
Apparatus as recited in claim 1, further comprising: modulating means, operatively connected to said third means, for modulating the non-hopping signal to produce a modulated signal; and transmitting means, operatively connected to said modulating means, for transmitting the modulated signal.
Claim 5
Dependent Claim
67 words
Apparatus as recited in claim 1 wherein said third means comprises: a first dispersive delay line operatively connected to said second means; a second dispersive delay line receiving the transformed antenna signal; and mixing means, operatively connected to said first dispersive delay line and said second dispersive delay line, for mixing signals respectively produced by said first and second dispersive delay lines to produce the non-hopping signal.
Claim 6
Dependent Claim
30 words
Apparatus as recited in claim 1, further comprising: fourth means, operatively connected to said third means, for removing any non-hopping portion of the transformed antenna signal from the non-hopping signal.
Claim 7
Dependent Claim
15 words
Apparatus as recited in claim 5 wherein said fourth means comprises a low pass filter.
Claim 8
Independent Claim
41 words
A method for detecting a frequency hopping signal, comprising: transforming a first signal; detecting any frequency hopping in the transformed signal; and converting the any detected frequency hopping in the transformed signal to a non-hopping signal having a predetermined center frequency.
Claim 9
Independent Claim
41 words
A method for detecting a frequency hopping signal, comprising: transforming a first signal; detecting any frequency hopping in the transformed signal; and converting the any detected frequency hopping in the transformed signal to a non-hopping signal having a predetermined center frequency.
Claim 10
Dependent Claim
22 words
A method as recited in claim 7 wherein: said detecting step comprises timing the dwell of the first signal at a frequency.
Claim 11
Dependent Claim
25 words
A method as recited in claim 7, further comprising: after said converting step, removing any non-hopping portion of the transformed signal from the non-hopping signal.
References Cited (Backward Citations)
US2982853A
Cited
US3691464A
Cited
US3714573A
Cited
US4217586A
Cited
US4100498A
Cited
US4247939A
Cited
US4313147A
Cited
US4583231A
Cited
US4656642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-07 | 1999-02-06 | 1999-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-07 | 2003-02-06 | 2003-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-07 | 2007-02-06 | 2007-08-08 | $7700.00 | Window Closed / Lapsed |