scholarly journals A New Three-Dimension Deceptive Scene Generation against Single-Pass Multibaseline InSAR Based on Multiple Transponders

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1053
Author(s):  
Penghui Ji ◽  
Dahai Dai ◽  
Shiqi Xing ◽  
Bo Pang
Keyword(s):  
Computer Simulations ◽  
Synthetic Aperture ◽  
Complex Coefficient ◽  
Three Dimension ◽  
Generation Algorithm ◽  
Deceptive Jamming ◽  
Single Baseline ◽  
3D Scene ◽  
Complex Modulation ◽  
Modulation Coefficient

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.

scholarly journals Deceptive Targets Generation Simulation Against Multichannel SAR

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 597
Author(s):  
Penghui Ji ◽  
Shiqi Xing ◽  
Dahai Dai ◽  
Bo Pang
Keyword(s):  
Synthetic Aperture ◽  
Minimum Condition ◽  
Complex Coefficient ◽  
Sar Images ◽  
Digital Elevation ◽  
Deceptive Jamming ◽  
Elevation Model ◽  
Interferometric Sar ◽  
General Architecture ◽  
Ground Moving Target Indication

Traditional synthetic aperture radar (SAR) deceptive jamming can effectively generate deceptive scenes or false targets in SAR images. However, these false targets or scenes can be easily distinguished or eliminated by the multichannel SAR system. To interfere with the multichannel SAR, we first analyzed the results of SAR deceptive jamming generated by one transponder and two transponders against three-channel SAR- ground moving target indication (GMTI). Then, we propose a new deceptive jamming method against three-channel SAR-GMTI by using three synergetic transponders. By modulating each transponder with a complex coefficient, three synergetic transponders can generate false moving targets with the controllable radial velocity and located azimuth position in three-channel SAR-GMTI. Besides, in this paper, we also introduce an algorithm to deploy three transponders reasonably by utilizing the minimum condition number. In the end, a general architecture of multiple transponders deceiving multichannel SAR is given. The proposed method can not only generate deceptive false targets against multichannel SAR-GMTI, but also guide the production of a deceptive digital elevation model (DEM) against multichannel interferometric SAR (InSAR). Simulations verify the effectiveness of the proposed method.

scholarly journals Deceptive Jamming Detection for SAR Based on Cross-Track Interferometry

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2265 ◽  
Author(s):  
Qingqing Feng ◽  
Huaping Xu ◽  
Zhefeng Wu ◽  
Wei Liu
Keyword(s):  
Sar Interferometry ◽  
Synthetic Aperture ◽  
Sar Image ◽  
Frequency Detection ◽  
Interferometric Phase ◽  
Deceptive Jamming ◽  
Jamming Detection ◽  
Novel Method ◽  
The Difference ◽  
Cross Track

Deceptive jamming against synthetic aperture radar (SAR) can create false targets or deceptive scenes in the image effectively. Based on the difference in interferometric phase between the target and deceptive jamming signals, a novel method for detecting deceptive jamming using cross-track interferometry is proposed, where the echoes with deceptive jamming are received by two SAR antennas simultaneously and the false targets are identified through SAR interferometry. Since the derived false phase is close to a constant in interferogram, it is extracted through phase filtering and frequency detection. Finally, the false targets in the SAR image are obtained according to the detected false part in the interferogram. The effectiveness of the proposed method is validated by simulation results based on the TanDEM-X system.

An Improved Interrupted Sampling Repeater Jamming to SAR

2011 ◽  
Vol 130-134 ◽  
pp. 2060-2063
Author(s):  
Hua Chao Hu ◽  
Xin Jia ◽  
Jin Liang Wu ◽  
Gui Ping Zhang ◽  
Yang Gao
Keyword(s):  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Sar Image ◽  
Two Dimensional ◽  
Deceptive Jamming ◽  
Jamming Effect ◽  
Aperture Radar

A new kind of Synthetic Aperture Radar (SAR) jamming method is proposed: the 2-D interrupted-sampling repeater jamming. The fundamentals and implement of this jamming method are investigated. This jamming method can realize two-dimensional jamming in range and azimuth, and cause the SAR image ambiguous, and achieves the effect of multi-false targets. The research shows: both the suppression and deceptive jamming effect exist. Its validities are proved by the simulation.

scholarly journals SELECTION OF PERSISTENT SCATTERER INTERFEROMETRIC SYNTHETIC APERTURE RADAR MASTER IMAGE CONSIDERING TEMPORAL BASELINE, SPATIAL BASELINE AND DOPPLER CENTROID FREQUENCY DIFFERENCE

2020 ◽  
Vol V-3-2020 ◽  
pp. 141-148
Author(s):  
Y. Lu ◽  
J. Zhang ◽  
X. Tong ◽  
X. Lu ◽  
W. Han ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Optimization Method ◽  
Frequency Difference ◽  
Synthetic Aperture ◽  
Interferometric Synthetic Aperture Radar ◽  
Persistent Scatterer ◽  
Centroid Frequency ◽  
Single Baseline ◽  
Selection Of ◽  
Aperture Radar

Abstract. This paper proposed a new algorithm master Image Temporal Spatial baseline, Doppler centroid frequency difference (MITSD) to select the PS-InSAR common master image (CMI), by using the sum of temporal baselines, spatial baselines, and Doppler centroid frequency differences as a reference. The existing persistent scatterer interferometric synthetic aperture radar (PS-InSAR) common master images election method is affected by three baseline factors: temporal baseline, spatial baseline, and Doppler centroid frequency differences, then one single baseline factor in the three baselines being too large or above the baseline threshold will cause the decoherence. This method normalizes the temporal baseline, spatial baseline, and Doppler centroid frequency baseline to the same order of magnitude, and then the results of baseline optimization are summed up as the minimum coherence. Simultaneously，the algorithm in this paper sets each limit the average value of each baseline as a threshold to reduce the influence of a single baseline. The C-band Sentinel-1A single-look complex (SLC) image data (VV-polarization) in the study area was used as experimental data to compare with the MITSD, the current MSTB (minimum sum of three baselines), and CCCM (comprehensive correlation coefficient method). The results showed that (a) the baseline optimization method was more reasonable and reliable in the selection of the master image in PS-InSAR technology; and (b) in this method, the calculation steps were reduced into the calculation process, and the model was more concise than other algorithms.

scholarly journals A Large-Scene Deceptive Jamming Method for Space-Borne SAR Based on Time-Delay and Frequency-Shift with Template Segmentation

2019 ◽  
Vol 12 (1) ◽  
pp. 53 ◽  
Author(s):  
Kaizhi Yang ◽  
Wei Ye ◽  
Fangfang Ma ◽  
Guojing Li ◽  
Qian Tong
Keyword(s):  
Time Delay ◽  
Frequency Shift ◽  
Processing Speed ◽  
Synthetic Aperture ◽  
Low Power Consumption ◽  
Control Factor ◽  
Correction Algorithm ◽  
Delay Term ◽  
The Past ◽  
Deceptive Jamming

Due to advantages such as its low power consumption and higher concealment, deceptive jamming against synthetic aperture radar (SAR) has received extensive attention during the past decades. However, large-scene deception jamming is still a challenge because of the huge computing burden. In this paper, we propose a new large-scene deceptive jamming algorithm. First, the time-delay and frequency-shift (TDFS) algorithm is introduced to improve the jamming processing speed. The system function of jammer (JSF) for a fake scatter is simplified to the multiplication of the scattering coefficient, a time-delay term in the range dimension and a frequency-shift term in the azimuth dimension. Then, in order to solve the problem that the effective region of the TDFS algorithm is limited, the scene deceptive jamming template is divided into several blocks according to the SAR parameters and imaging quality control factor. The JSF of each block is calculated by the TDFS algorithm and added together to achieve the large-scene jamming. Finally, the correction algorithm in squint mode is derived. The simplification and parallel-block processing could improve the calculation efficiency significantly. The simulation results verified the validity of the algorithm.

scholarly journals A Large Scene Deceptive Jamming Method for Space-Borne SAR based on Time-Delay and Frequency-Shift with Template Segmentation

2019 ◽  
Author(s):  
Kaizhi Yang ◽  
Wei Ye ◽  
Fangfang Ma ◽  
Guojing Li ◽  
Qian Tong
Keyword(s):  
Time Delay ◽  
Frequency Shift ◽  
Processing Speed ◽  
Synthetic Aperture ◽  
Low Power Consumption ◽  
Control Factor ◽  
Correction Algorithm ◽  
Delay Term ◽  
The Past ◽  
Deceptive Jamming

Due to the advantages such as low power consumption and higher concealment, deceptive jamming against synthetic aperture radar (SAR) receives extensive attention during the past decades. However, the large scene deception jamming is still a challenge because of the huge computing burden. In this paper, we propose a new large scene deceptive jamming algorithm. First, the time-delay and frequency-shift (TDFS) algorithm is introduced to improve the jamming processing speed. The system function of jammer (JSF) for a fake scatter is simplified to the multiplication of the scattering coefficient, a time-delay term in range dimension and a frequency-shift term in azimuth dimension. Then, in order to solve the problem that the effective region of the TDFS algorithm is limited, the scene deceptive jamming template is divided into several blocks according to the SAR parameters and imaging quality control factor. The JSF of each block is calculated by the TDFS algorithm and added together to achieve the large scene jamming. Finally, the correction algorithm in squint mode is derived. The simplification and parallel block processing could improve the calculation efficiency significantly. The simulation results verified the validity of the algorithm.

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