Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging
Gebert N, Krieger G (2009)
Publication Type: Journal article
Publication year: 2009
Journal
Publisher: IEEE - Institute of Electrical and Electronics Engineers
Book Volume: 6
Pages Range: 782-786
Journal Issue: 4
URI: https://elib.dlr.de/58420/
DOI: 10.1109/LGRS.2009.2025245
Abstract
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 nonoptimum PRF is associated with a nonuniform sample spacing in azimuth and needs to be compensated by a multichannel 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, thereby ensuring constant performance over a clearly extended PRF range. In particular, in combination with conventional multichannel processing strategies, this technique represents the next step toward a fully active multiple-input multiple-output (MIMO) SAR and has a great potential for future systems. © 2009 IEEE.
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APA:
Gebert, N., & Krieger, G. (2009). Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging. IEEE Geoscience and Remote Sensing Letters, 6(4), 782-786. https://doi.org/10.1109/LGRS.2009.2025245
MLA:
Gebert, Nicolas, and Gerhard Krieger. "Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging." IEEE Geoscience and Remote Sensing Letters 6.4 (2009): 782-786.
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