IL92768A0 - Discrete autofocus for ultra-high resolution synthetic aperture radar - Google Patents
Discrete autofocus for ultra-high resolution synthetic aperture radarInfo
- Publication number
- IL92768A0 IL92768A0 IL92768A IL9276889A IL92768A0 IL 92768 A0 IL92768 A0 IL 92768A0 IL 92768 A IL92768 A IL 92768A IL 9276889 A IL9276889 A IL 9276889A IL 92768 A0 IL92768 A0 IL 92768A0
- Authority
- IL
- Israel
- Prior art keywords
- ultra
- high resolution
- synthetic aperture
- aperture radar
- resolution synthetic
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9004—SAR image acquisition techniques
- G01S13/9011—SAR image acquisition techniques with frequency domain processing of the SAR signals in azimuth
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9004—SAR image acquisition techniques
- G01S13/9019—Auto-focussing of the SAR signals
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/288,741 US5043734A (en) | 1988-12-22 | 1988-12-22 | Discrete autofocus for ultra-high resolution synthetic aperture radar |
Publications (1)
Publication Number | Publication Date |
---|---|
IL92768A0 true IL92768A0 (en) | 1990-09-17 |
Family
ID=23108448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL92768A IL92768A0 (en) | 1988-12-22 | 1989-12-18 | Discrete autofocus for ultra-high resolution synthetic aperture radar |
Country Status (8)
Country | Link |
---|---|
US (1) | US5043734A (xx) |
EP (1) | EP0378832B1 (xx) |
JP (1) | JPH02245687A (xx) |
AU (1) | AU620952B2 (xx) |
CA (1) | CA2003469C (xx) |
DE (1) | DE68913499T2 (xx) |
ES (1) | ES2049800T3 (xx) |
IL (1) | IL92768A0 (xx) |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4999635A (en) * | 1990-03-29 | 1991-03-12 | Hughes Aircraft Company | Phase difference auto focusing for synthetic aperture radar imaging |
US5235375A (en) * | 1990-04-12 | 1993-08-10 | Olympus Optical Co., Ltd. | Focusing position detecting and automatic focusing apparatus with optimal focusing position calculation method |
EP0451865B1 (en) * | 1990-04-12 | 1996-06-26 | Olympus Optical Co., Ltd. | Automatic focusing apparatus with optimal focusing position calculation method |
DE4037725A1 (de) * | 1990-11-27 | 1992-06-11 | Deutsche Forsch Luft Raumfahrt | Verfahren zur digitalen generierung von sar-bildern und einrichtung zu dessen durchfuehrung |
DE4122592C1 (xx) * | 1991-07-08 | 1993-01-28 | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De | |
US5179383A (en) * | 1991-07-15 | 1993-01-12 | Raney R K | Synthetic aperture radar processor to handle large squint with high phase and geometric accuracy |
DE4124062C1 (xx) * | 1991-07-19 | 1992-09-03 | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De | |
US5248976A (en) * | 1991-11-27 | 1993-09-28 | Hughes Aircraft Company | Multiple discrete autofocus |
US5200754A (en) * | 1991-11-27 | 1993-04-06 | Hughes Aircraft Company | Fourth-order-product phase difference autofocus |
US5184134A (en) * | 1991-11-27 | 1993-02-02 | Hughes Aircraft Company | Fast phase difference autofocus |
GB2267783B (en) * | 1992-06-09 | 1996-08-28 | British Aerospace | Beam forming |
US5343204A (en) * | 1993-07-29 | 1994-08-30 | Unisys Corporation | Auto-focusing correction for rotational acceleration effects on inverse synthetic aperture radar images |
US5570099A (en) * | 1993-10-15 | 1996-10-29 | Loral Federal Systems Company | TDOA/FDOA technique for locating a transmitter |
US5463397A (en) * | 1993-10-25 | 1995-10-31 | Hughes Aircraft Company | Hyper-precision SAR interferometry using a dual-antenna multi-pass SAR system |
US5552792A (en) * | 1994-09-19 | 1996-09-03 | E-Systems, Inc. | Non-coherent radar system having improved resolution capabilities |
US5546085A (en) * | 1994-12-05 | 1996-08-13 | Loral Corporation | Separating coherent radio-frequency interference from synthetic aperture data |
US5708436A (en) * | 1996-06-24 | 1998-01-13 | Northrop Grumman Corporation | Multi-mode radar system having real-time ultra high resolution synthetic aperture radar (SAR) capability |
US5943006A (en) * | 1996-10-25 | 1999-08-24 | Patrick E. Crane | RF image reconstruction and super resolution using fourier transform techniques |
US5854602A (en) * | 1997-04-28 | 1998-12-29 | Erim International, Inc. | Subaperture high-order autofocus using reverse phase |
US6037892A (en) * | 1998-05-28 | 2000-03-14 | Multispec Corporation | Method for automatic focusing of radar or sonar imaging systems using high-order measurements |
US6097328A (en) * | 1998-07-02 | 2000-08-01 | Raytheon Company | Averaging-area-constrained adaptive interferometric filter that optimizes combined coherent and noncoherent averaging |
US8005035B2 (en) | 2001-04-27 | 2011-08-23 | The Directv Group, Inc. | Online output multiplexer filter measurement |
US7778365B2 (en) * | 2001-04-27 | 2010-08-17 | The Directv Group, Inc. | Satellite TWTA on-line non-linearity measurement |
US7471735B2 (en) * | 2001-04-27 | 2008-12-30 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US7173981B1 (en) | 2001-04-27 | 2007-02-06 | The Directv Group, Inc. | Dual layer signal processing in a layered modulation digital signal system |
US7502430B2 (en) | 2001-04-27 | 2009-03-10 | The Directv Group, Inc. | Coherent averaging for measuring traveling wave tube amplifier nonlinearity |
US7423987B2 (en) | 2001-04-27 | 2008-09-09 | The Directv Group, Inc. | Feeder link configurations to support layered modulation for digital signals |
US7639759B2 (en) | 2001-04-27 | 2009-12-29 | The Directv Group, Inc. | Carrier to noise ratio estimations from a received signal |
US7483505B2 (en) | 2001-04-27 | 2009-01-27 | The Directv Group, Inc. | Unblind equalizer architecture for digital communication systems |
US7583728B2 (en) | 2002-10-25 | 2009-09-01 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
US7822154B2 (en) | 2001-04-27 | 2010-10-26 | The Directv Group, Inc. | Signal, interference and noise power measurement |
US7184489B2 (en) | 2001-04-27 | 2007-02-27 | The Directv Group, Inc. | Optimization technique for layered modulation |
US7209524B2 (en) * | 2001-04-27 | 2007-04-24 | The Directv Group, Inc. | Layered modulation for digital signals |
US7245671B1 (en) | 2001-04-27 | 2007-07-17 | The Directv Group, Inc. | Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers |
GB0116310D0 (en) * | 2001-07-04 | 2001-08-29 | New Transducers Ltd | Contact sensitive device |
JP4597444B2 (ja) * | 2001-09-19 | 2010-12-15 | 三菱電機株式会社 | 合成開口レーダ装置および合成開口レーダ装置における像再生方法 |
JP3852569B2 (ja) * | 2001-10-25 | 2006-11-29 | 三菱電機株式会社 | レーダ信号処理装置および方法 |
AU2003280499A1 (en) | 2002-07-01 | 2004-01-19 | The Directv Group, Inc. | Improving hierarchical 8psk performance |
AR040395A1 (es) | 2002-07-03 | 2005-03-30 | Hughes Electronics Corp | Metodo y aparato para modulacion por capas |
US7463676B2 (en) * | 2002-10-25 | 2008-12-09 | The Directv Group, Inc. | On-line phase noise measurement for layered modulation |
US7529312B2 (en) | 2002-10-25 | 2009-05-05 | The Directv Group, Inc. | Layered modulation for terrestrial ATSC applications |
AU2003301717A1 (en) * | 2002-10-25 | 2004-05-25 | The Directv Group, Inc. | Lower complexity layered modulation signal processor |
US7474710B2 (en) | 2002-10-25 | 2009-01-06 | The Directv Group, Inc. | Amplitude and phase matching for layered modulation reception |
US7502429B2 (en) | 2003-10-10 | 2009-03-10 | The Directv Group, Inc. | Equalization for traveling wave tube amplifier nonlinearity measurements |
US7126524B2 (en) * | 2004-08-04 | 2006-10-24 | Raytheon Company | Motion compensation for convolutional SAR algorithms |
DE602004016697D1 (de) * | 2004-11-26 | 2008-10-30 | Saab Ab | Antennen-rückkeulen-dämpfung |
US7064702B1 (en) * | 2005-03-01 | 2006-06-20 | The Boeing Company | System, method and computer program product for reducing quadratic phase errors in synthetic aperture radar signals |
US7391357B1 (en) * | 2005-03-25 | 2008-06-24 | Sandia Corporation | Correction of motion measurement errors beyond the range resolution of a synthetic aperture radar |
US7522097B2 (en) * | 2005-12-08 | 2009-04-21 | The Boeing Company | Radar platform angular motion compensation |
US7307580B2 (en) * | 2006-01-17 | 2007-12-11 | Raytheon Company | Non-statistical method for compressing and decompressing complex SAR data |
US7663529B2 (en) * | 2006-08-15 | 2010-02-16 | General Dynamics Advanced Information Systems, Inc. | Methods for two-dimensional autofocus in high resolution radar systems |
US20080297405A1 (en) * | 2007-04-06 | 2008-12-04 | Morrison Jr Robert L | Synthetic Aperture focusing techniques |
WO2017031149A1 (en) * | 2015-08-19 | 2017-02-23 | Texas Instruments Incorporated | Method and system for compression of radar signals |
US10209356B2 (en) * | 2015-11-24 | 2019-02-19 | Mitsubishi Electric Research Laboratories, Inc. | Method and system for autofocus radar imaging |
DE102017119624A1 (de) * | 2017-08-28 | 2019-04-18 | HELLA GmbH & Co. KGaA | Verfahren zum Betrieb eines Radarsystems eines Fahrzeuges |
DE102018202864A1 (de) * | 2018-01-19 | 2019-07-25 | Infineon Technologies Ag | Verfahren und System für Synthetische-Apertur-Radarsignalverarbeitung |
US11209524B2 (en) * | 2019-09-30 | 2021-12-28 | Veoneer Us, Inc. | Detection system and method for characterizing targets |
CN111880180B (zh) * | 2020-07-03 | 2023-05-26 | 西安电子科技大学 | 一种高分辨运动舰船sar成像的自聚焦方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4034370A (en) * | 1972-08-23 | 1977-07-05 | Westinghouse Electric Corporation | Second order motion compensator for high resolution radar |
US4219811A (en) * | 1975-02-07 | 1980-08-26 | Hughes Aircraft Company | Synthetic array autofocus system |
GB2185651B (en) * | 1979-10-19 | 1988-01-27 | Emi Ltd | Synthetic aperture radar |
GB2185869B (en) * | 1979-10-19 | 1987-12-23 | Emi Ltd | Doppler technique of synthetic aperture radar motion compensation |
US4471357A (en) * | 1981-10-26 | 1984-09-11 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Pipelined digital SAR azimuth correlator using hybrid FFT/transversal filter |
US4771287A (en) * | 1983-06-23 | 1988-09-13 | Westinghouse Electric Corp. | Method of correcting for errors in radar imaging |
JPS6020162A (ja) * | 1983-07-15 | 1985-02-01 | Hitachi Ltd | 合成開口レ−ダ画像再生処理方式 |
US4780718A (en) * | 1985-06-17 | 1988-10-25 | Hughes Aircraft Company | Sar image encoding for data compression |
IT1181998B (it) * | 1985-12-24 | 1987-09-30 | Selenia Ind Elettroniche | Elaboratore di segnale per radar ad apertura sintetica particolarmente adatto al calcolo parallelo |
US4706088A (en) * | 1986-03-24 | 1987-11-10 | United Technologies Corporation | Synthetic aperture radar focusing |
US4724418A (en) * | 1986-03-24 | 1988-02-09 | United Technologies Corporation | Synthetic aperture radar focusing |
US4706089A (en) * | 1986-03-24 | 1987-11-10 | United Technologies Corporation | Synthetic aperture radar focusing |
GB8714746D0 (en) * | 1987-06-24 | 1987-07-29 | Secr Defence | Synthetic aperture radar |
US4801939A (en) * | 1987-09-04 | 1989-01-31 | Unisys Corporation | High-speed data compressor/decompressor for synthetic aperture radar |
-
1988
- 1988-12-22 US US07/288,741 patent/US5043734A/en not_active Expired - Lifetime
-
1989
- 1989-11-21 CA CA002003469A patent/CA2003469C/en not_active Expired - Fee Related
- 1989-12-18 IL IL92768A patent/IL92768A0/xx not_active IP Right Cessation
- 1989-12-18 AU AU46910/89A patent/AU620952B2/en not_active Ceased
- 1989-12-20 DE DE68913499T patent/DE68913499T2/de not_active Expired - Lifetime
- 1989-12-20 EP EP89123506A patent/EP0378832B1/en not_active Expired - Lifetime
- 1989-12-20 ES ES89123506T patent/ES2049800T3/es not_active Expired - Lifetime
- 1989-12-22 JP JP1334700A patent/JPH02245687A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE68913499D1 (de) | 1994-04-07 |
DE68913499T2 (de) | 1994-06-09 |
CA2003469C (en) | 1994-11-08 |
ES2049800T3 (es) | 1994-05-01 |
EP0378832A3 (en) | 1990-08-01 |
US5043734A (en) | 1991-08-27 |
CA2003469A1 (en) | 1990-06-22 |
EP0378832B1 (en) | 1994-03-02 |
AU620952B2 (en) | 1992-02-27 |
EP0378832A2 (en) | 1990-07-25 |
AU4691089A (en) | 1990-06-28 |
JPH02245687A (ja) | 1990-10-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RH | Patent void |