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As many target characteristics can be extracted from the echoes by inverse synthetic aperture radar (ISAR), the jamming signal on ISAR need to simulate the electromagnetic scattering characteristics and kinematics characteristics with high fidelity. Based on the principle of periodic 0-&#x03C0; phase modulation, a method generating 2-D ISAR group targets is proposed. Radar pulses are sampled and modulated according to periodic 0-&#x03C0; phase sequence by the escort free-flight jammer, and then the modulated signals are retransmitted to the protected target, which can generate verisimilar false target images in ISAR. After the principle of escort free-flight jamming is introduced, the theory of periodic 0-&#x03C0; phase sequence is expounded. The generation process of jamming signal is analyzed. According to the 2-D output expression, the jamming effects with different modulation parameters are demonstrated. A theoretical study is carried out to determine the number, amplitude and space distribution of false targets. Experimental results of scattering model of an aircraft illuminate the effectiveness and correctness of the proposed method.

Multiple Targets Deception Jamming Against ISAR Based on Periodic 0- $\pi$ Phase Modulation