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FMCW-InISAR imaging for high-speed target based on bistatic configuration

Science China(Technological Sciences) 2020年第8期63卷 1452-1469页

作者： WANG Yong RONG JiaJia ZHANG QingXiang HAN Tao Research Institute of Electronic Engineering Technology Harbin Institute of TechnologyHarbin 150001China

Interferometric inverse synthetic aperture radar(InISAR)imaging has been proved to be a powerful means for obtaining threedimensional(3-D)space shape of noncooperative *** modulated continuous wave(FMCW)InISAR(FMCWInISAR)has unique advantages of low power,low cost,and small volume compared with traditional coherent pulsed ***,FMCW-InISAR imaging has two additional issues to consider,the one is the invalidation of the assumption of stop&go,which is caused by the relatively long sweep interval of FMCW;the other is the isolation of the transmitting and receiving antennas,which is the inherent issue of the transmitter-receiver community radar *** solve these two problems,a bistatic FMCW-InISAR imaging algorithm for high-speed targets is proposed in this *** improving the isolation of the transmitting and receiving antennas,a bistatic configuration based FMCW-InISAR system is *** to the characteristics of bistatic,a bistatic equivalent motion model and corresponding signal model are *** the assumption of stop&go is invalid in the case of FMCW,indicating that the target cannot be viewed as motionless during a sweep repetition interval(SRI),a parametric estimation based quadratic phase factor(QPF)compensation method is investigated to eliminate the range walk caused by the radial motion of the target during the *** addition,considering the farfield trait of the target and combining the traditional InISAR imaging process,a combined QPF compensation technique is proposed to reduce the computational burden of the ***,the effectiveness and the robustness of the proposed algorithm are evaluated by some simulations.

关键词： interferometric inverse synthetic aperture radar(InISAR) frequency modulated continuous wave(FMCW) bistatic configuration radial motion compensation high-speed target imaging

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Numerical Modeling of Electromagnetic Scattering from Sea Surface Covered by Oil

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Journal of Electromagnetic Analysis and Applications 2014年第1期6卷 15-24页

作者： Helmi Ghanmi Ali Khenchaf Fabrice Comblet Lab-STICC UMR CNRS 6285 ENSTA Bretagne2Rue Francois Verny29806Brest Cedex 09France

The aim of this work is to study the impacts of the oil spills on the electromagnetic scattering of the ocean surfaces in bistatic and monostatic configurations. Therefore, in this paper, we will study the influence of the pollutants (oil spills) on the physical and geometrical properties of sea surface. In recent literature, the study of the electromagnetic scattering from contaminated sea surface (sea surface covered by oil spill) was limited in monostatic case. In this paper, we will study this effect in bistatic configuration, which is interested in presence of pollution in sea surface. Indeed, we will start the numerical analysis of the bistatic scattering coefficients of a clean sea surface. Then, we will study the electromagnetic signature from sea surface covered by oil spills in bistatic case using the numerical Forward-Backward Method (FBM). The obtained numerical simulation of bistatic scattering coefficients of clean and contaminated sea surface is studied as a function of various parameters (frequency, incident angle, sea state, type of pollutant…). And the obtained results are also compared with those published in the literature, including those using asymptotic methods.

关键词： Sea Surface Oil Spills Forward-Backward Method Asymptotic Methods Electromagnetic Scattering Coefficients bistatic configuration

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