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Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) is a compact, cost-effective and high-resolution remote sensing system. The Frequency non-linearities of FMCW SAR seriously deteriorate its range resolution. To overcome this problem and integrate the non-linearity correction method into the imaging algorithm, in this paper, we propose a non-linear range-Doppler algorithm for...
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...
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...
A novel scheme of the Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) with multiple orthogonal transmitted waveforms is introduced in this paper. Based on the Interleaved Orthogonal Frequency Division Multiplex (I-OFDM) principle, the transmit waveform successfully combines the advantages of the linear frequency modulated waveform and the OFDM waveform. This maintains FMCW...
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