Abstract
The interferometry synthetic aperture radar (InSAR) deceptive jamming method utilizing two synergetic transponders can generate a false three-dimension (3D) scene in a single baseline InSAR image. However, such deceptive capability could be reduced by the multibaseline InSAR system. To obtain effective deception on multibaseline InSAR, a novel deceptive scene generation method jointly employing multiple transponders is proposed. It only demands that each transponder is modulated with a complex coefficient when generating a false point. The complex modulation coefficient can be offline calculated according to the deceptive point coordinate by solving a matrix. Besides, the complex modulation coefficient can be combined with the deceptive scene template, and thus a large 3D deceptive scene is able to be created quickly in the multibaseline InSAR image by using the fast two-dimension (2D) SAR deceptive scene generation algorithm. As long as the number of transponders is not less than the number of antennas of the multibaseline InSAR system, this proposed method is effective. The effectiveness of the proposed method is validated by computer simulations.
Highlights
As a good supplement of the light imaging, synthetic aperture radar (SAR) can acquire two-dimension (2D) high-resolution images sustainably under all-weather and all-time conditions [1].Interferometry SAR (InSAR), a further development of SAR, employs two or more antennas to retrieve the terrain digital elevation model (DEM) of the ground surface, widely used in civil and military fields such as topographic mapping, disaster assessment, battlefield reconnaissance, strike effectiveness evaluation, etc. [2,3,4,5]
To better analyze the effects on the SAR image resulted from the phase of the imaging output of the jamming signals, we only considered that jamming was generated by a single transponder against single baseline interferometry synthetic aperture radar (InSAR)
Based on the previous analysis, we could conclude that to obtain the desired phase satisfying the height of the deceptive target, the number of transponders should not be less than the number of antennas of the multibaseline InSAR system
Summary
As a good supplement of the light imaging, synthetic aperture radar (SAR) can acquire two-dimension (2D) high-resolution images sustainably under all-weather and all-time conditions [1]. In [20], the phase of the jamming signals was precisely controlled by modulating two transponders with different complex coefficients to produce a three-dimension (3D) deceptive scene in the InSAR image. Without changing the process of the SAR deception jamming generated by a single transponder, each transponder only needs to be modulated with a complex coefficient to generate deception jamming in the multibaseline InSAR system. Propose a new 3D deceptive scene generation method for jointly utilizing multiple transponders against multibaseline InSAR. The geometrical model of single-pass multibaseline InSAR is first given, and the basic principle of InSAR deceptive jamming is introduced
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