Unambiguous reconstruction and imaging of nonuniform sampling SAR signals

Nonuniform sample of SAR signal will bring the noise into the signals, and thus mix the spectrum of the echo signals with that of the noises, increase ambiguity of the signals, and depress the SAR imaging quality. In wide swath SAR mode, the multi-channel receivers are used in azimuth, the nonuniform sampling will be met. This paper analyzes in detail analysis the unambiguous spectrum reconstruction of the nonuniform sampling SAR signals and multi-channel SAR imaging; Based on the difference and correlation between the multi-channels signals and single channel signal, we resolve the multi-channels SAR imaging, the simulate results prove that the theoretic analysis is correct.