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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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