Moreover, the jamming in the weakened area will be suppressed. To protect the manoeuvring target from being detected by radar, some jamming technologies are utilised. Thus, after DPCA processing, the jamming result is similar to the real moving target. are dispensed into the atmosphere. A jamming signal is then generated by the parallel convolution of the extracted radar signal and high-resolution range profile of a target model. Finally, the validity of the proposed method is verified by simulation experiments. probability of detection and an increasing of the
Finally, by exploiting belief propagation, we propose a multi-layer saliency fusion approach to derive a high-quality saliency map. Simulations verify the effectiveness of the proposed method. 11.2.2.5 Noise Jamming. In this section, Concealment will be called "noise" or "noise jamming".
Then, we propose a new deceptive jamming method against three-channel SAR-GMTI by using three synergetic transponders.
A comprehensive study of the effects of noise jamming on various pulsed radar receiver types is proposed. However, such deceptive capability could be significantly reduced or denied by single-pass SAR interferometry (InSAR). clouds for the radar signals. It requires a lower jamming power than barrage jamming and has less computational complexity than direct-path deception jamming. However, extracting river information from radar data efficiently and accurately still remains an open problem. Concealment (Jamming) usually uses some form of noise as the transmitted ECM signal. Results indicate that, as SAR slant-range resolution increases, the SAR ATI improves in performance, whereas the SAR DPCA does not. In this paper, SAR-GMTI algorithms for multichannel SAR systems, which we call multichannel displaced phase center antenna (DPCA), multichannel along track interferometry (ATI), and multichannel DPCA-ATI, are presented. Simulation results are provided to confirm the validity of the proposed schemes. Figure 2: RR-129 and RR-144: two types of chaff and their canisters. Simulation results are provided to verify the validity of the proposed jamming algorithm. Based on all residuals for all types of features, two residual sequences for PR and AR are respectively built. The other is based on the along-track interferometry (ATI) technique, in which magnitude and phase information of the targets' interferograms are exploited to extract them from the background clutter. Technol., Changsha, Hunan, China, 2016. Afterwards, three saliency measurements based on the specificity of the rivers in the SAR images are proposed to generate a single layer saliency map, i.e., Local Region Contrast (LRC), Boundary Connectivity (BC) and Edge Density (ED). By analyzing parameters’ difference between echoes and jamming signal, the velocity and the initial position of the footprint will be calculated, and then the verisimilar false targets are generated. Introducing the sub-Nyquist sampling transforms the convolution into a parallel formation, which has a simpler structure and can be computed in real time. An Anti-Deceptive Jamming Method for Multistatic Synthetic Aperture Radar based on Collaborative Localization and Spatial Suppression, An Interrupted Sampling Scattered Wave Deception Jamming Method against Three-Channel SAR GMTI, Deceptive Targets Generation Simulation Against Multichannel SAR, Optimization Method for Multiple Phases Sectionalized Modulation Jamming Against Linear Frequency Modulation Radar Based on a Genetic Algorithm, Method Research and Realization of Noise FM Jamming Based on DDS Technology, Deception Jamming Against ISAR Based on Convolution and Sub-Nyquist Sampling, Deceptive SAR Jamming Based on 1-bit Sampling and Time-Varying Thresholds, Visual Saliency Modeling for River Detection in High-resolution SAR Imagery, Analysis of the Effect of Interference on InSAR, Improved method for synthetic aperture radar scattered wave deception jamming, A Large Scene Deceptive Jamming Method for Space-Borne SAR, A comparison of displaced phase centre antenna and along-track interferometry techniques for RADARSAT-2 ground moving indication, A Novel Scattered Wave Deception Jamming Against Three Channel SAR GMTI, Runway Detection in SAR Images Based on Fusion Sparse Representation and Semantic Spatial Matching, Countering performance analysis of scatter-wave jamming against multi-channel SAR-GMTI, Image-Based Target Detection and Radial Velocity Estimation Methods for Multichannel SAR-GMTI, Airborne Demonstration of DPCA for Velocity Measurements of Distributed Targets, A novel barrage repeater jamming against SAR-GMTI, Deception jamming method based on micro-Doppler effect for vehicle target, Research of 3-D Deceptive Interfering Method for Single-Pass Spaceborne InSAR, Three-dimensional deceptive scene generation against single-pass InSAR based on coherent transponders, Investigation on countermeasure against InSAR dual-channel cancellation technique with multi-antenna jammer, Deception Jamming for Squint SAR Based on Multiple Receivers, The influence of Rebound Jamming on SAR GMTI, A Novel Method for Adaptive SAR Barrage Jamming Suppression, Application of an improved DPCA algorithm in rock-fall monitoring based on synthetic aperture radar.
Various jamming techniques have been developed to prevent interferometric synthetic aperture radar from effective detection and observation. These stay quite long time into the atmosphere and cause impenetrable
In this method, the covariance matrix of jamming is estimated from the SAR image. To derive the jamming result, a general signal model for the interference is first presented and the corresponding imaging results are produced through the range-Doppler algorithm.
Com. While DPCA has been used for many years in canceling clutter for point target motion measurements, its use in measuring Doppler from distributed targets was not well established. If a perfect match is achieved, the candidate target can be confirmed. Then, to improve performance, the traditional displaced phase centre antenna (DPCA) method is extended to three or more receiver channels. Adjusting the frequency of sub-Nyquist sampling signal allows flexible control of the number and distribution of false targets. The jammer adjusts the time-delay and the phase of the intercepted SAR signal. Eng., Natl.
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