Digital Beamforming for Spaceborne ReflectorBased Synthetic Aperture Radar, Part 1 Basic Imaging Modes
| Autor: | Alberto Moreira, Gerhard Krieger, Sigurd Huber, Marwan Younis, Felipe Queiroz de Almeida, Michelangelo Villano |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Synthetic aperture radar
Beamforming General Computer Science Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Reflector (antenna) Resolution (logic) synthetic aperture radar (SAR) digital-beam forming Azimuth Radar imaging Electronic engineering General Earth and Planetary Sciences Electrical and Electronic Engineering Focus (optics) reflector-based SAR Instrumentation Realization (systems) Radarkonzepte |
| Popis: | Deployable reflector antennas illuminated by a digital feed array enable spaceborne synthetic aperture radar (SAR) systems capable to image an ultra-wide continuous swath at fine azimuth resolution. This is facilitated by the use of dedicated operation modes and by multi-dimensional digital beam-forming techniques. This paper is intended as a tutorial, where focus is put on the required on-board functionality, operational techniques, and the digital beam-forming aspects, for which a rigorous mathematical description is included. To maintain general validity, the functional implementation for the various modes is detailed, thus avoiding restricting the description to a specific realization. The reader is assumed to be familiar with the general concept of synthetic aperture radar, and otherwise referred to literature \cite{Moreira13} for a general introduction. The approach followed here is to start with a basic simple operation concept (part I) and then move to more advanced modes (part II and III) successively increasing the complexity; the mathematical description follows the same approach. |
| Databáze: | OpenAIRE |
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