Harmonic Synthetic Aperture Radar Processing
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We review the basic concept of frequency-modulated continuous wave (FMCW) and describe how such a radar system can be used in a harmonic radar concept. It is argued that synthetic aperture radar (SAR) for FMCW harmonic radar can be implemented by carefully choosing the wavenumbers in the mixing part of the FMCW concept. It is also argued that the following SAR processing is an extension of conventional SAR processing when applied to a harmonic FMCW system.
Berger, Tor; Hamran, Svein-Erik. Harmonic Synthetic Aperture Radar Processing. IEEE Geoscience and Remote Sensing Letters 2015 ;Volum 12.(10) s. 2066-2069