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US3720944A
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Signal system for jamming detection systems utilizing signal correlation
Assignee: Fairchild Space and Defense Corp
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Filing: 1960-12-01
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Granted: 1973-03-13
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Expires: 1980-12-01
Abstract
Abstract The invention provides for a method and apparatus for jamming detection systems employing signal correlation devices, wherein a jamming signal may be transmitted. The transmitted signal, which is susceptible of detection by remote detection systems, has a plurality of identical components, at least one of which is displaced in time relative to another. The amount of time displacement may be selectively adjusted or varied to produce false correlations in the remote detecting systems.
Inventors
- 👤 S Kramer
- 👤 G Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:28
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/60; H04K3/68; H04K3/80; H04K3/82; H04K3/825; H04K3/40; H04K3/42; H04K3/45
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A method of jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising the steps of producing a jamming signal having a plurality of substantially identical components which are respectively displaced in time relative to another by a factor n Delta t, where Delta t is the delay time in seconds and n is an integer, and transmitting said jamming signal to a remote detection system via direct and reflected paths.
Claim 2
Independent Claim
80 words
A method of jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising the steps of producing a jamming signal having a plurality of substantially identical components which are respectively displaced in time relative to another by a factor n Delta t, where Delta t is the delay time in seconds and n is an integer, and transmitting said jamming signal to a remote detection system via direct and reflected paths.
Claim 3
Independent Claim
80 words
A method of jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising the steps of producing a jamming signal having a plurality of substantially identical components which are respectively displaced in time relative to another by a factor n Delta t, where Delta t is the delay time in seconds and n is an integer, and transmitting said jamming signal to a remote detection system via direct and reflected paths.
Claim 4
Independent Claim
80 words
A method of jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising the steps of producing a jamming signal having a plurality of substantially identical components which are respectively displaced in time relative to another by a factor n Delta t, where Delta t is the delay time in seconds and n is an integer, and transmitting said jamming signal to a remote detection system via direct and reflected paths.
Claim 5
Independent Claim
84 words
A method for jamming detection systems employing devices for correlating noise signals received from a remote object over different paths of propagation, comprising the steps of generating a noise signal, selectively delaying said generated noise signal to produce a signal having substantially identical components with said generated noise signal but relatively displaced in time, and transmittinG a jamming signal susceptible of reception by remote detection systems, said jamming signal including a signal representative of said generated noise signal and the selectively delayed noise signal.
Claim 6
Independent Claim
84 words
A method for jamming detection systems employing devices for correlating noise signals received from a remote object over different paths of propagation, comprising the steps of generating a noise signal, selectively delaying said generated noise signal to produce a signal having substantially identical components with said generated noise signal but relatively displaced in time, and transmittinG a jamming signal susceptible of reception by remote detection systems, said jamming signal including a signal representative of said generated noise signal and the selectively delayed noise signal.
Claim 7
Dependent Claim
89 words
A jamming system, comprising signal generating means for generating s given signal, means for selectively delaying respective components of said given signal by factor n Delta t, where Delta t is the time delay in seconds and n is an integer, means for combining said given signal and said delayed signal components to produce a jamming signal susceptible of reception by remote detection means and having a plurality of identical components, at least one of which is displaced in time relative to another by the factor n Delta t.
Claim 8
Dependent Claim
89 words
A jamming system, comprising signal generating means for generating s given signal, means for selectively delaying respective components of said given signal by factor n Delta t, where Delta t is the time delay in seconds and n is an integer, means for combining said given signal and said delayed signal components to produce a jamming signal susceptible of reception by remote detection means and having a plurality of identical components, at least one of which is displaced in time relative to another by the factor n Delta t.
Claim 9
Dependent Claim
111 words
A jamming system for jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising a noise signal generating means for producing a noise signal, delay means for delaying said noise signal to produce a delayed noise signal substantially identical with said given signal but relatively displaced in time, means for combining said noise signal and said delayed noise signal to produce a jamming signal, and means for transmitting said jamming signal at a frequency susceptible of reception by remote detection means, said jamming signal having a plurality of identical components, at least one of which is displaced in time relative to another.
Claim 10
Dependent Claim
111 words
A jamming system for jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising a noise signal generating means for producing a noise signal, delay means for delaying said noise signal to produce a delayed noise signal substantially identical with said given signal but relatively displaced in time, means for combining said noise signal and said delayed noise signal to produce a jamming signal, and means for transmitting said jamming signal at a frequency susceptible of reception by remote detection means, said jamming signal having a plurality of identical components, at least one of which is displaced in time relative to another.
Claim 11
Dependent Claim
131 words
A jamming system for jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising a noise signal generating means for producing a noise signal, delay means for delaying said noise signal to produce a delayed noise signal substantially identical with said given signal but relatively displaced in time, feedback means for feeding a portion of said delayed noise signal back through said delay means to produce in the output of said delay means a jamming signal having a plurality of substantially identical components displaced in time relative to one another, said feedback means and said delay means having a loop gain of less than unity, and means for transmitting said jamming signal at a frequency susceptible of reception by remote detection means.
Claim 12
Dependent Claim
131 words
A jamming system for jamming detection systems employing devices for correlating signals received from a remote object over different paths of propagation, comprising a noise signal generating means for producing a noise signal, delay means for delaying said noise signal to produce a delayed noise signal substantially identical with said given signal but relatively displaced in time, feedback means for feeding a portion of said delayed noise signal back through said delay means to produce in the output of said delay means a jamming signal having a plurality of substantially identical components displaced in time relative to one another, said feedback means and said delay means having a loop gain of less than unity, and means for transmitting said jamming signal at a frequency susceptible of reception by remote detection means.
Claim 13
Dependent Claim
85 words
A transmitting system for jamming receivers of the correlation type which correlate signals received from a remote signal radiating object via direct and reflected paths comprising means for generating a noise signal, means for delaying components of said noise signal by times n Delta t seconds, where n is an integer and Delta t is the time delay of the delay means, means for combining said generated noise signal and said delayed components to produce a jamming signal, and means for transmitting said jamming signal.
Claim 14
Dependent Claim
85 words
A transmitting system for jamming receivers of the correlation type which correlate signals received from a remote signal radiating object via direct and reflected paths comprising means for generating a noise signal, means for delaying components of said noise signal by times n Delta t seconds, where n is an integer and Delta t is the time delay of the delay means, means for combining said generated noise signal and said delayed components to produce a jamming signal, and means for transmitting said jamming 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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |