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Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging

Gebert, Nicolas und Krieger, Gerhard (2009) Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging. IEEE Geoscience and Remote Sensing Letters, 6 (4), Seiten 782-786.

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Synthetic aperture radar (SAR) systems with multiple receive channels allow for high-resolution wide-swath imaging thus overcoming a fundamental limitation of conventional single-aperture SAR. By using multiple apertures in azimuth, additional samples are received for each transmitted pulse. This allows for a reduced pulse repetition frequency (PRF) thereby enabling a wider swath. However, a non-optimum PRF is associated with a non-uniform sample spacing in azimuth and needs to be compensated by a multi-channel reconstruction algorithm. For strong deviations from the optimum PRF, the inverse character of such an algorithm might result in a degraded performance. This can be overcome by an innovative advanced transmit antenna architecture which allows for a pulse-to-pulse shift of the phase center. Such an antenna enables the adaptive adjustment of the system�s phase center positions to the respective PRF, by this ensuring constant performance over a clearly extended PRF range. Especially in combination with conventional multi-channel processing strategies this technique represents the next step towards a fully active Multiple-Input Multiple-Output (MIMO) SAR and has a great potential for future systems.

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Titel:Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging
AutorenInstitution oder E-Mail-Adresse der Autoren
Datum:Oktober 2009
Erschienen in:IEEE Geoscience and Remote Sensing Letters
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Ja
Seitenbereich:Seiten 782-786
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Stichwörter:Optimized multi-channel azimuth processing, high-resolution wide-swath SAR, digital beamforming on receive, phase center adaptation
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Entwicklung eines Mini-SAR (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Institut für Hochfrequenztechnik und Radarsysteme
Hinterlegt von: Nicolas Gebert
Hinterlegt am:24 Mär 2009
Letzte Änderung:12 Dez 2013 20:37

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