Spaceborne SAR systems with digital beamforming and reflector antenna:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Köln
DLR
2014
|
| Ausgabe: | Als Ms. gedr. |
| Schriftenreihe: | Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt
2014,9 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zsfassung in dt. und engl. Sprache |
| Beschreibung: | XV, 217 S. Ill., graph. Darst. |
Internformat
MARC
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Datensatz im Suchindex
| _version_ | 1804152139610587136 |
|---|---|
| adam_text | CONTENTS
ACRONYMS AND SYMBOLS V
1 INTRODUCTION 1
1.1 A BRIEF HISTORICAL REVIEW 2
1.2 STATE-OF-THE-ART AND MOTIVATION 3
1.3 SCOPE OF THE WORK 6
2 THEORETICAL BACKGROUND 9
2.1 RADAR SCATTERING 9
2.1.1 THE SAR IMAGING EQUATION 12
2.2 SPECTRAL REPRESENTATION OF POINT TARGETS 14
2.2.1 EWALD SPHERE CONSTRUCTIONS 18
2.2.2 SAR SYSTEMS AND RESOLUTION 20
2.2.3 SAR SIGNAL SAMPLING 22
2.3 SAR SIGNALS AND AMBIGUITIES 24
2.4 SIGNAL-TO-NOISE RATIO 27
3 CONVENTIONAL SAR SYSTEMS 28
3.1 COMPARISON: PLANAR VERSUS REFLECTOR ANTENNA SAR SYSTEM 29
3.1.1 PLANAR ARRAY ANTENNAS 30
3.1.2 ARRAY-FED REFLECTOR ANTENNAS 32
3.2 WIDE-SWATH SAR SYSTEM OPERATION 40
3.3 LIMITATIONS 44
4 MULTI-CHANNEL REFLECTOR SAR SYSTEMS 49
4.1 MULTI-CHANNEL REFLECTOR SAR SYSTEM MODEL 51
4.1.1 THE NARROWBAND APPROXIMATION 53
4.2 DIGITAL BEAMFORMING FOR SIDE-LOOKING SAR SYSTEMS .... 55
4.2.1 DIGITAL BEAMFORMING AND EXTENDED PULSES 56
4.2.2 DIGITAL BEAMFORMING WITH RANGE COMPRESSED DATA 58
HTTP://D-NB.INFO/1049989902
CONTENTS
4.2.3 DIGITAL BEAMFORMING IN THE TIME-WAVENUMBER DO
MAIN 60
4.2.4 DIGITAL BEAMFORMING IN 3-D TIME-WAVENUMBER SPACE 62
4.3 OPTIMAL BEAMFORMING TECHNIQUES 64
4.3.1 COST FUNCTION AND CONSTRAINTS 65
4.3.2 BEAMFORMING BY CHANNEL SWITCHING 69
4.3.3 MINIMUM VARIANCE DISTORTIONLESS RESPONSE BEAM-
FORMING 71
4.3.4 LINEAR CONSTRAINT MINIMUM VARIANCE BEAMFORMING 73
4.4 BEAMFORMING WITH SPACEBORNE REFLECTOR SAR SENSORS ... 76
4.4.1 DIGITAL BEAMFORMING IN ELEVATION 80
4.4.2 DIGITAL BEAMFORMING IN AZIMUTH 90
4.4.3 DIGITAL BEAMFORMING FOR POLARIMETRIC APPLICATIONS . 97
5 REFLECTOR SAR SYSTEM DESIGN EXAMPLE 104
5.1 REFLECTOR DESIGN EQUATIONS 104
5.1.1 REFLECTOR AND FEED ARRAY DESIGN IN AZIMUTH . . . .109
5.1.2 REFLECTOR AND FEED ARRAY DESIGN IN ELEVATION . . . .111
5.2 SYSTEM PERFORMANCE 113
5.2.1 ELEVATION PERFORMANCE 115
5.2.2 AZIMUTH PERFORMANCE 127
5.2.3 POLARIMETRIC PERFORMANCE 140
5.3 ERROR AND SENSITIVITY ANALYSIS 143
6 OPTIMIZATION STRATEGIES 150
6.1 DIGITAL BEAMFORMING WITH ROBUST CONSTRAINTS 150
6.1.1 THE DIGITAL SIDELOBE CANCELLER 151
6.1.2 LCMV BEAMFORMING AS SPATIAL BAND-STOP FILTER . . 153
6.2 A REFLECTOR CONCEPT ROBUST AGAINST FEED FAILURES 157
6.2.1 ONE-DIMENSIONALLY DEFOCUSED REFLECTOR ANTENNAS . 158
6.2.2 PERFORMANCE 161
6.2.3 PERFORMANCE UNDER FAILURE CONDITIONS 164
6.2.4 DISCUSSION 165
7 DIGITAL BEAMFORMING DEMONSTRATOR 168
7.1 DATA PREPROCESSING 170
7.2 DEMONSTRATION OF PRINCIPLE: UNITY AND MVDR BEAMFORMINGL71
II
CONTENTS
7.3 A DBF EXPERIMENT IN ELEVATION 174
7.3.1 DISCUSSION 177
8 CONCLUSIONS 179
8.1 OUTLOOK 181
A ELECTROMAGNETIC SCATTERING 183
A.L FIELD SOLUTIONS 184
B LINEARLY FILTERED PROCESSES 189
C MATCHED FILTERED CHIRP SIGNALS 193
D QUADRATIC OPTIMIZATION 195
E
SNR
FOR TIME-VARIANT BEAMFORMERS 197
F OPTIMAL TIME-VARIANT BEAMFORMING 200
G INTEGRATED AND PEAK-SIDELOBE RATIO 202
H HILBERT TRANSFORM RELATIONS 203
BIBLIOGRAPHY 204
III
|
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| author | Huber, Sigurd 1978- |
| author_GND | (DE-588)1049912942 |
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| author_sort | Huber, Sigurd 1978- |
| author_variant | s h sh |
| building | Verbundindex |
| bvnumber | BV041813045 |
| classification_rvk | ZN 6500 |
| ctrlnum | (OCoLC)878030262 (DE-599)BSZ403901286 |
| dewey-full | 621.38485 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.38485 |
| dewey-search | 621.38485 |
| dewey-sort | 3621.38485 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik |
| edition | Als Ms. gedr. |
| format | Thesis Book |
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| genre_facet | Hochschulschrift |
| id | DE-604.BV041813045 |
| illustrated | Illustrated |
| indexdate | 2024-07-10T01:05:58Z |
| institution | BVB |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-027258389 |
| oclc_num | 878030262 |
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| owner | DE-83 DE-706 DE-210 |
| owner_facet | DE-83 DE-706 DE-210 |
| physical | XV, 217 S. Ill., graph. Darst. |
| publishDate | 2014 |
| publishDateSearch | 2014 |
| publishDateSort | 2014 |
| publisher | DLR |
| record_format | marc |
| series2 | Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt |
| spelling | Huber, Sigurd 1978- Verfasser (DE-588)1049912942 aut Spaceborne SAR systems with digital beamforming and reflector antenna Sigurd Huber Als Ms. gedr. Köln DLR 2014 XV, 217 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt 2014,9 Zsfassung in dt. und engl. Sprache Zugl.: Karlsruhe, KIT, Diss., 2014 Reflektorantenne (DE-588)4177330-5 gnd rswk-swf Synthetische Apertur (DE-588)4195782-9 gnd rswk-swf Radargerät (DE-588)4176771-8 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Radargerät (DE-588)4176771-8 s Synthetische Apertur (DE-588)4195782-9 s Reflektorantenne (DE-588)4177330-5 s DE-604 Deutsches Zentrum für Luft- und Raumfahrt Forschungsbericht 2014,9 (DE-604)BV011758990 2014,9 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027258389&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Huber, Sigurd 1978- Spaceborne SAR systems with digital beamforming and reflector antenna Reflektorantenne (DE-588)4177330-5 gnd Synthetische Apertur (DE-588)4195782-9 gnd Radargerät (DE-588)4176771-8 gnd |
| subject_GND | (DE-588)4177330-5 (DE-588)4195782-9 (DE-588)4176771-8 (DE-588)4113937-9 |
| title | Spaceborne SAR systems with digital beamforming and reflector antenna |
| title_auth | Spaceborne SAR systems with digital beamforming and reflector antenna |
| title_exact_search | Spaceborne SAR systems with digital beamforming and reflector antenna |
| title_full | Spaceborne SAR systems with digital beamforming and reflector antenna Sigurd Huber |
| title_fullStr | Spaceborne SAR systems with digital beamforming and reflector antenna Sigurd Huber |
| title_full_unstemmed | Spaceborne SAR systems with digital beamforming and reflector antenna Sigurd Huber |
| title_short | Spaceborne SAR systems with digital beamforming and reflector antenna |
| title_sort | spaceborne sar systems with digital beamforming and reflector antenna |
| topic | Reflektorantenne (DE-588)4177330-5 gnd Synthetische Apertur (DE-588)4195782-9 gnd Radargerät (DE-588)4176771-8 gnd |
| topic_facet | Reflektorantenne Synthetische Apertur Radargerät Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027258389&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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