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Digital beamforming in SAR systems

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3 Author(s)
Younis, M. ; Inst. fur Hochstfrequenztechnik und Elektron., Univ. Karlsruhe, Germany ; Fischer, C. ; Wiesbeck, W.

The rapid progression in digital hardware and signal processing capabilities stimulates the development of radar systems. The tendency is to move the digital interface toward the antenna, replacing, whenever possible, analog RF-hardware. Based on software codes, these digital systems are more flexible and easier to reconfigure than RF-hardware. This letter illustrates the general concept for digital beamforming (DBF) in synthetic aperture radar systems and investigates their principle capabilities, limitations, and performance parameters. It is shown that using DBF a simultaneous improvement in azimuth coverage and resolution can be achieved.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:41 ,  Issue: 7 )