Signal Processing for Digital Beamforming FMCW SAR | Zendy

Qin Xin | Zendy; Zhi-Hong Jiang | Zendy; Pu Cheng | Zendy; Mi He | Zendy

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Signal Processing for Digital Beamforming FMCW SAR

Author(s) -

Qin Xin,

Zhi-Hong Jiang,

Pu Cheng,

Mi He

Publication year - 2014

Publication title -

mathematical problems in engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.262

H-Index - 62

eISSN - 1026-7077

pISSN - 1024-123X

DOI - 10.1155/2014/859890

Subject(s) - beamforming , pulse repetition frequency , synthetic aperture radar , signal (programming language) , computer science , continuous wave radar , electronic engineering , continuous wave , signal processing , point target , digital signal processing , radar imaging , radar , engineering , telecommunications , computer vision , optics , physics , laser , programming language

According to the limitations of single channel Frequency Modulation Continuous Wave (FMCW) Synthetic Aperture Radar (SAR), Digital Beamforming (DBF) technology is introduced to improve system performance. Combined with multiple receive apertures, DBF FMCW SAR can obtain high resolution in low pulse repetition frequency, which can increase the processing gain and decrease the sampling frequency. The received signal model of DBF FMCW SAR is derived. The continuous antenna motion which is the main characteristic of FMCW SAR received signal is taken into account in the whole signal processing. The detailed imaging diagram of DBF FMCW SAR is given. A reference system is also demonstrated in the paper by comparing with a single channel FMCW SAR. The validity of the presented diagram is demonstrated with a point target simulation results

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