Research of 3-D Deceptive Interfering Method for Single-Pass Spaceborne InSAR

摘要

The traditional synthetic aperture radar (SAR) deceptive jamming can effectively create false targets or deceptive scenes in the SAR image. However, such deceptive capability could be significantly reduced or denied by single-pass SAR interferometry (InSAR). To achieve effective deception on InSAR, the impact of SAR deceptive jamming on single-pass spaceborne InSAR is analyzed. Then, a novel fast 3-D deceptive jamming algorithm based on multiple jammers is proposed. In this method, the specific geographic locations of two jammers are first determined by the limiting conditions. Next, the expected terms for the two jammers are generated based on the deceptive phase and the relative positions of antennas and jammers. Finally, the deceptive templates are decomposed into two parts, one of which is pre-produced while the other is generated by real-time modulation. After convolving those deceptive templates with the intercepted signals, the transmitting signals of the two jammers are created. The proposed method will generate false scenes in two single looking complex (SLC) images, resulting in a false phase of the interferogram and producing a deceptive digital elevation model (DEM). The effectiveness of the proposed method is validated by computer simulations.