US4654665A
Expired / Lapsed
US
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Radar system
Assignee: NEC Corp
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Filing: 1984-07-23
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Granted: 1987-03-31
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Expires: 2004-07-23
Abstract
Abstract A radar system comprises means for forming a transmission pulse signal as m sets of n pulses, the individual sets having respective PRPs Ti (i=1, 2, . . . , m) moving target detection means, and angle measurement means utilizing beam-to-beam amplitude comparison and interpolation for a given moving target. Beam-to-beam amplitude comparison and interpolation is carried out at least twice for one target by making use of a pair of video signals with the same PRP processed by the moving target detection means. The angle measurement is achieved through a predetermined correlation processing over thus obtained interpolated angle values for a target.
Inventors
- 👤 Eiichi Kiuchi
- 👤 Yuichi Tomita
- 👤 Toshiyuki Izutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:49
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/524; G01S13/526; G01S13/528; G01S13/06; G01S13/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A radar system comprising: means for forming a transmission pulse signal as m (m being an integer greater than unity) sets of n pulses, the individual sets having respective PRPS TI (i=1, 2, . . ., m); moving target detection means having an MTI canceller, a plurality of multi-doppler filters which separate an output signal of said MTI canceller in accordance with doppler frequencies and a constant false alarm rate (CFAR) processor which applies a CFAR processing to an output of each of said multi-doppler filters; and angle measurement means utilizing beam-to-beam amplitude comparison and interpolation for a given moving target, said beam-to-beam amplitude comparison and interpolation being carried out at least twice for one target by making use of a pair of video signals with the same PRP processed by said moving target detection means, said angle measurement being achieved through a predetermined correlation processing over thus obtained interpolated angle values for a target.
Claim 2
Dependent Claim
155 words
A radar system comprising: means for forming a transmission pulse signal as m (m being an integer greater than unity) sets of n pulses, the individual sets having respective PRPS TI (i=1, 2, . . ., m); moving target detection means having an MTI canceller, a plurality of multi-doppler filters which separate an output signal of said MTI canceller in accordance with doppler frequencies and a constant false alarm rate (CFAR) processor which applies a CFAR processing to an output of each of said multi-doppler filters; and angle measurement means utilizing beam-to-beam amplitude comparison and interpolation for a given moving target, said beam-to-beam amplitude comparison and interpolation being carried out at least twice for one target by making use of a pair of video signals with the same PRP processed by said moving target detection means, said angle measurement being achieved through a predetermined correlation processing over thus obtained interpolated angle values for a target.
References Cited (Backward Citations)
US3441930A
Cited
US3750152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |