Synthetic Aperture Radar Interference Based on Scene Fusion and Active Cancellation

Echo cancellation is used for eliminating echo signals by signal modulation in the frequency domain and time domain. However, it depends on the high accuracy of parameter estimation. In addition, it introduces an incompatible black mark in the synthetic aperture radar (SAR) image, which will be easily detected and inevitably degrades the deception performance. To address this problem, this article proposed a compound interference method that combines echo cancellation and deception jamming. In order to fuse the deception scene with the surrounding scene, the optimal deception template is generated by using the scene around the target of interest (TOI), and the deception template is used to modulate the coefficient of the original signal to generate the deception signal. Then, the deception signal is sent to the SAR platform together with the cancellation signal, which is generated by an active source. After the SAR process, the incompatible black mark in the image is replaced by a template with high similarity of surrounding scene, which effectively improves the deception performance. The proposed method can be used to cover the higher scattering characteristic of the TOI with the lower scattering characteristic of the deception template. Simulation results are provided and analyzed to validate the universality and the performance superiority of the proposed method.