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Patent US3614719A successfully refreshed from Google Patents.
US3614719A
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Adaptive pulse echo target identification system
Assignee: RTX Corp
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Filing: 1968-11-25
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Granted: 1971-10-19
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Expires: 1988-11-25
Abstract
Abstract An adaptive target identification system is described in which a chirped or frequency swept pulse is transmitted towards a target. The reflected pulse is analyzed over its frequency spectrum by a series of tuned filters to produce a reflection spectrum which is proportional to the reflection coefficient of the target as a function of frequency. The next chirped pulse to be transmitted is modulated in response to the reflection spectrum, each pulse echo controlling the next transmitted pulse. A steady state condition results in which successive transmitted pulses are identical and uniquely determined by the reflection spectrum of the target.
Inventors
- 👤 Edmond B Treacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:48
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/539; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S7/52004; G06; G06V; G06V20/00; G06V20/60; G06V20/64
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A target identification system comprising: means for generating a plurality of frequency varying pulses, means for transmitting a first of said pulses toward a target, at least a portion of said first pulse being reflected by said target upon intersection herewith, receiver means for sensing said reflected pulse and producing a first signal in response thereto, spectrum analyzer means for producing from said first signal a second signal proportional in amplitude to the reflection coefficient of the target as a function of the frequency range of said transmitted pulse, means for transmitting a second of said frequency varying pulses toward said target, means for modulating said second signal upon said second frequency varying pulse, and means for producing an output from said second signal.
Claim 2
Dependent Claim
124 words
A target identification system comprising: means for generating a plurality of frequency varying pulses, means for transmitting a first of said pulses toward a target, at least a portion of said first pulse being reflected by said target upon intersection herewith, receiver means for sensing said reflected pulse and producing a first signal in response thereto, spectrum analyzer means for producing from said first signal a second signal proportional in amplitude to the reflection coefficient of the target as a function of the frequency range of said transmitted pulse, means for transmitting a second of said frequency varying pulses toward said target, means for modulating said second signal upon said second frequency varying pulse, and means for producing an output from said second signal.
Claim 3
Dependent Claim
17 words
A target identification system as in claim 1 in which said output comprises an audio output signal.
Claim 4
Dependent Claim
98 words
A target identification system as in claim 1 in which said spectrum analyzer means includes a plurality of filters, each filter being tuned to a different frequency within the frequency range of said frequency varying pulses, detector means connected with each said filter, each said filter passing a selected portion of the said first signal to its corresponding detector whereby each said filter-detector combination produces a spectral signal proportional to the amplitude of the reflected pulse at the frequency of the filter, and means for scanning the spectral signal from each said detector to produce said second signal.
Claim 5
Dependent Claim
32 words
A target identification system as in claim i and including amplifier means connected between said spectrum analyzer means and said modulating means, and means for varying the linearity of said amplifier means.
Claim 6
Dependent Claim
20 words
A target identification system as in claim 1 in which said generating means exponentially varies the frequency of said pulses.
Claim 7
Dependent Claim
22 words
A target identification system as in claim 1 in which said second signal is amplitude modulated upon such second frequency varying pulse.
Claim 8
Dependent Claim
86 words
A target identification system comprising: means for generating a plurality of frequency varying pulses, means for transmitting said pulses in timed relation toward a target, receiver means for sensing the reflection of each said pulse from said target, spectrum analyzer means connected with said receiver means for producing from each reflected pulse an output signal proportional in amplitude to the reflection coefficient of the target over the frequency range of said transmitted pulses, and means for amplitude modulating said output signal upon the next transmitted pulse.
Claim 9
Dependent Claim
86 words
A target identification system comprising: means for generating a plurality of frequency varying pulses, means for transmitting said pulses in timed relation toward a target, receiver means for sensing the reflection of each said pulse from said target, spectrum analyzer means connected with said receiver means for producing from each reflected pulse an output signal proportional in amplitude to the reflection coefficient of the target over the frequency range of said transmitted pulses, and means for amplitude modulating said output signal upon the next transmitted pulse.
References Cited (Backward Citations)
US2890437A
Cited
US3122720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |