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Interrupted-sampling repeater jamming (ISRJ) is a novel jamming mode for pulse compression radar in principle. In this paper, a jamming approach of applying ISRJ to de-chirping radar is presented. The principles of ISRJ are expounded, and the ways to achieve a train false target for de-chirping radar are analyzed. The characteristics of false target, including time-domain characteristic, frequency-domain characteristic and amplitude characteristic, are described. Based on this, the power requirement for jammer is put forward and the key elements that determine the space distribution location between true and false targets are discussed in detail. At last, simulation results are presented and addressed. This work is beneficial to the jamming design and use of ISRJ.

A method of using Interrupted-Sampling Repeater Jamming (ISRJ) to cancel radar target echo is proposed. After the principles of ISRJ are expounded, three conditions that should be met for radar echo cancellation are proposed, including range synchronization, phase coherent and amplitude match. Then, the restriction for key parameters of ISRJ, i.e. the repeater power, the delay time and frequency of repeater are deduced in theory. At last, the influences of those parameters on radar echo cancellation are discussed in detail. Some numerical results are presented to verify the effectiveness of this method. This work is beneficial to the jamming design and use of ISRJ.