Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling

Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling

The displaced phase center (DPC) technique will enable a wide-swath synthetic aperture radar (SAR) with high azimuth resolution. In a classic DPC system, the pulse repetition frequency (PRF) has to be chosen such that the SAR carrier moves just one half of its antenna length between subsequent radar...

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Veröffentlicht in:IEEE geoscience and remote sensing letters 2004-10, Vol.1 (4), p.260-264
Hauptverfasser: Krieger, G., Gebert, N., Moreira, A.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Antennas
Azimuth
Displacement
Frequency
Nonuniform
Nonuniform sampling
Radar antennas
Reconstruction
Reconstruction algorithms
Sampling
Sampling methods
Signal reconstruction
Signal resolution
Spaceborne radar
Synthetic aperture radar
Synthetic apertures
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Zusammenfassung:The displaced phase center (DPC) technique will enable a wide-swath synthetic aperture radar (SAR) with high azimuth resolution. In a classic DPC system, the pulse repetition frequency (PRF) has to be chosen such that the SAR carrier moves just one half of its antenna length between subsequent radar pulses. Any deviation from this PRF will result in a nonuniform sampling of the synthetic aperture. This letter derives an innovative reconstruction algorithm and shows that an unambiguous reconstruction of a SAR signal is possible for nonuniform sampling of the synthetic aperture. This algorithm will also have great potential for multistatic satellite constellations as well as the dual receive antenna mode in Radarsat 2 and TerraSAR-X.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2004.832700