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Corner reflector is a metal equipment consisting of three mutually perpendicular planes. It is widely used in radiometric calibration as well as an ideal point. Earlier researchers usually regard it as an isotropic target for synthetic aperture radar (SAR) applications. However, deep analysis indicates imaging characteristics of a corner reflector vary with azimuth observation angle. With the increasing...
Deceptive jamming, covering the true targets and producing false targets in the SAR image, has been widely applied in electronic warfare. To effectively suppress the deceptive jamming generated by detecting parameters of target echoes, this work proposes a novel anti-jamming approach. Firstly, the chirp signal with varying initial phase is predesigned and transmitted. Then, the random initial phases...
The sample rate of SAR imaging algorithm based on compressive sensing theory is well below the traditional imaging method, and can also accurately reconstruct the original signal. The SAR imaging based on compressive sensing theory has become a hot issue in this area. It is generally considered that the imaging result based on this method has no sidelobe. In this paper, by changing the sparsity of...
In this paper, the authors propose sector scan ground-based synthetic aperture radar (GB-SAR) technique for real-time monitoring of wide-ranging landslides. The non-linear movement of the antenna which moves along a sector to form a wide scanning area makes the azimuth properties complicated. Geometric model of the antenna movement is established to derive the slant range expression. Further, the...
GR-strip (Geography-Referenced stripmap) imaging mode is a new imaging mode of SAR (Synthetic Aperture Radar), it is very different from the normal stripmap imaging mode. Operating in this mode, trajectory of aircraft can be un-parallel to swath, thus a higher flexibility is obtained due to the reduces of limitation for radar trajectory. Meanwhile, the characteristic of unlimited swath in azimuth...
Theory and application study of Frequency Modulated Continuous Wave(FMCW) Synthetic Aperture Radar(SAR) imaging has gained more attention nowadays. Based on Range Doppler Algorithm(RDA), signal characteristic of FMCW SAR was analyzed in details, and aiming at the azimuth matched filtering problem a method named Scene Range Cell Covering Algorithm(SRCCA) was proposed. Simulation results indicate that...
The GMTI (Ground Moving Target Indication) performance for circular scanning SAR (Synthetic Aperture Radar) equipped on slow platform was analyzed in this paper. The characteristics of SAR equipped on slow platform and the GMTI application were descript in the beginning, and the circular scanning mode was advanced to resolve the low azimuth imaging efficiency of the slow platform borne SAR. Then the...
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