Abstract
A method is proposed to perform target deception jamming against spaceborne synthetic aperture radar. Compared with the traditional jamming methods using deception templates to cover the target or region of interest, the proposed method aims to generate a verisimilar deceptive target in various attitude with high fidelity using the electromagnetic (EM) scattering. Based on the geometrical model for target deception jamming, the EM scattering data from the deceptive target was first simulated by applying an EM calculation software. Then, the proposed jamming frequency response (JFR) is calculated offline by further processing. Finally, the deception jamming is achieved in real time by a multiplication between the proposed JFR and the spectrum of intercepted radar signals. The practical implementation is presented. The simulation results prove the validity of the proposed method.
Highlights
Synthetic aperture radar (SAR) has been widely applied in both civil surveillance and military reconnaissance
Five scatterers are set as the false targets for the analysis of focusing, which are located at Parameters Carrier frequency Chirp bandwidth Sampling frequency Pulse repetition frequency Velocity Squint angle Orbit altitude Resolution of azimuth Resolution of range
The proposed jamming frequency response (JFR) is calculated by means of the EM scattering data from the deceptive target and further processing
Summary
Synthetic aperture radar (SAR) has been widely applied in both civil surveillance and military reconnaissance. The ECM techniques against SAR include the barrage jamming and the deception jamming. The jammer transmits the noise-like jamming signals into SAR echoes with a very high jamming power, which may be easy to be suppressed and not be applicable in practice.[5,6] In the direct retransmitting deception jamming,[7,8,9] the jammer generates the coherent jamming signals by a convolution between the unit impulse response of the jammer system and the intercepted radar signals with a much lower transmitting power than the barrage jamming
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