As an effective category of deception jamming, repeater jamming generates range false targets appearing dispersedly by modulating and retransmitting intercepted radar signals. However, distributed multiple-radar system will reject the false targets overstep a space resolution cell automatically in spatial registration. Therefore, it is necessary to discuss the ability of repeater jamming on multiple-radar system. When the distance between different stations is not far, this paper derives the effective jamming condition. When the jammer locates in the far field, it is theoretically proved that the false targets generating by the same delays can always deceive the multiple-radar system. When the jammer locates in the near field, it can also deceive the multiple-radar system by adjusting the time delay. The effective range of time delay is derived. The obtained conclusion is a good guidance for both the jamming and anti-jamming of multiple-radar systems.
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