US4053884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High prf unambiguous range radar
Assignee: United States Department of the Navy
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Filing: 1976-03-26
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Granted: 1977-10-11
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Expires: 1996-03-26
Abstract
Abstract A pulse-compression MTI doppler radar system includes an antenna, a transter, a coded modulator, a receiver and a display. The coded modulator is connected to the transmitter and has at least two waveform generators for coding pulses having low cross-correlation. A pulse-compression filter having at least two pulse compressors for providing pulse compressed signals is connected to the receiver. Each pulse compressor is matched autocorrelatively to a different one of the waveform generators. An MTI processor has two MTI processing channels which are responsive to the pulse-compressed signals and provide an output to the display.
Inventors
- 👤 Ben H. Cantrell
- 👤 Bernard L. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:52
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/284; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
In a pulse-compression MTI doppler radar system including an antenna, a coded modulator having at least two waveform generators for generating coded pulses having low cross-correlation, a transmitter, a receiver, and a display, the improvements comprising: a pulse-compression filter, connected to receive the output of said receiver, having at least two pulse compressors for providing pulse-compressed signals, each pulse compressor matched autocorrelatively to a different one of said waveform generators; at least two MTI processing channels for providing unambiguous range and speed indications to said display; and a multiplexer connected to receive the outputs of said pulse compressors for directing said pulse-compressed outputs to said MTI processing channels.
Claim 2
Dependent Claim
108 words
In a pulse-compression MTI doppler radar system including an antenna, a coded modulator having at least two waveform generators for generating coded pulses having low cross-correlation, a transmitter, a receiver, and a display, the improvements comprising: a pulse-compression filter, connected to receive the output of said receiver, having at least two pulse compressors for providing pulse-compressed signals, each pulse compressor matched autocorrelatively to a different one of said waveform generators; at least two MTI processing channels for providing unambiguous range and speed indications to said display; and a multiplexer connected to receive the outputs of said pulse compressors for directing said pulse-compressed outputs to said MTI processing channels.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 in which said coded modulator includes a prf generator, and a second multiplexer connecting said prf generator to said waveform generators.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 in which said pulse compressors are connected in parallel to said receiver.
References Cited (Backward Citations)
US3363248A
Cited
US3968490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |