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In order to reduce the reconstruction bias, the improved G matrix model is extended to dual-polarimetric brightness temperature reconstruction in the FPIR so as to obtain the three approaches including the complete one, the intermediate one and the approximated one. Numerical simulations have been conducted. The results show that the reconstructed image in the intermediate approach is much closer to the actual brightness temperature image than the approximated one and the intermediate one is less time consuming and requires less memory than the complete one. They also show that the complete approach can be replaced by the intermediate one at a low cross polarization level. It is demonstrated that the improved G matrix model is effectively applied in the FPIR for obtaining more quickly and accurately dual-polarimetric brightness temperature image. [ABSTRACT FROM AUTHOR]

It is potentially useful to perform deception jamming by the use of intermittent sampling repeater jamming in ISAR, thus the characteristics of the repeated jamming signal after dechirping are investigated. Based on the two-dimensional expression of the output, the features of the jamming in ISAR are discussed and the various jamming effects with different intermittent sampling intervals and duty ratios are also addressed. The analysis is demonstrated by the simulations. Additionally, the two-dimensional false-target images are also validated preliminarily associated with measured data. [ABSTRACT FROM AUTHOR]

Due to the measurement error of Pulse Repetition Interval (PRI), the non-synchronism between the jammer transmitter and the Synthetic Aperture Radar (SAR) receiver has harmful influence on the jamming effect. It is valuable to study the influence for the development and application of deceptive jammer. Based on the background, the PRI measurement error and jamming signal models are established in this paper. The analytic expressions between the PRI measurement error and shape location and resolution of the deceptive target image have been deduced and possible jamming results are analyzed detailedly. The correctness of theoretical analysis is proved by the simulation experiment. [ABSTRACT FROM AUTHOR]