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To overcome the contradiction between wide swath and high resolution in synthetic aperture radar systems, a multichannel azimuth reconstruction method is investigated to unambiguously recover the Doppler spectrum. The proposed method is derived from the least squares principle by exploiting a Vandermonde component of the system matrix. The Vandermonde matrix is Doppler independent and data independent...
For multi-channel synthetic aperture radar (SAR), Doppler reconstruction method could suppress azimuth ambiguities to overcome the contradiction between wide swath and high resolution imaging. The reconstruction method deals with main-lobe aliasing, while side-lobe spectra still exist and are weighted by filter weightings. When the system matrix is ill-conditioned, the un-recovered ambiguities are...
To overcome the contradiction between wide unambiguous swath and high azimuth resolution in synthetic aperture radar (SAR) system, a multi-channel reconstruction method is investigated to unambiguously recover the azimuth signal even for nonuniform spatial samplings. This reconstruction method is derived from matrix inversion method under least square principle. By taking the system additive noise...
Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) is a compact promising remote imaging sensor. Providing FMCW SAR system with simultaneous GMTI application is an appealing and difficult work. To discriminate the target optimally, the total moving target range walk must be taken in account, especially considering its high resolution property. In this paper a concept of relative...
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