Patent USH1122H successfully refreshed from Google Patents.
USH1122H
Expired / Lapsed
US
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Frequency decomposition into range and range-rate
Assignee: United States Department of the Navy
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Filing: 1991-06-24
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Granted: 1992-12-01
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Expires: 2011-06-24
Abstract
Abstract A process that derives estimates of range and range-rate during the radar ack of an object, when the radar employes a linear frequency modulated waveform. FM waveforms at the radar wavelength are transmitted. The frequency of the radar echos are measured and the difference between the incoming frequency of radar echos and the local oscillator frequency is estimated. The signal is decomposed into Range and Range rate. Implementation of the decomposition device can either be a sequence of stored software or a hardwired processor.
Inventors
- 👤 Richard E. Pavek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:02
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S13/70; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/36; G01S13/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A process for deriving estimates of range and range-rate during the track of a target when the radar employs a single linear frequency modulated waveform, comprising the steps of: successively measuring the radar frequency; and estimating both range, and range-rate at the compeletion of each radar frequency measurement using subsequent frequency measurements with the previous estimate of range.
Claim 2
Dependent Claim
58 words
A process for deriving estimates of range and range-rate during the track of a target when the radar employs a single linear frequency modulated waveform, comprising the steps of: successively measuring the radar frequency; and estimating both range, and range-rate at the compeletion of each radar frequency measurement using subsequent frequency measurements with the previous estimate of range.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the last frequency measurement, N, corresponds to the last opportunity to measure the radar frequency before the radar waveform is altered.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the step of estimating range includes: computing subsequent range and range rate each time frequency is measured using subsequent frequency measurements with the previous estimate of range.
Claim 5
Dependent Claim
76 words
A process of determining the range and range-rate of an object, comprising the steps of: transmitting FM waveforms of a predetermined wavelength; estimating the frequency difference between the incoming frequency of the echo of said transmitted waveform and the local oscillator frequency; estimating initial range and range rate; successively measuring the incoming echo frequency; and computing subsequent range and range rate each time frequency is measured using subsequent frequency measurements with the previous estimate of range.
Claim 6
Dependent Claim
76 words
A process of determining the range and range-rate of an object, comprising the steps of: transmitting FM waveforms of a predetermined wavelength; estimating the frequency difference between the incoming frequency of the echo of said transmitted waveform and the local oscillator frequency; estimating initial range and range rate; successively measuring the incoming echo frequency; and computing subsequent range and range rate each time frequency is measured using subsequent frequency measurements with the previous estimate of range.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-01 | 1996-06-01 | 1996-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-01 | 2000-06-01 | 2000-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-01 | 2004-06-01 | 2004-12-01 | $7700.00 | Window Closed / Lapsed |