An Interrupted Sampling Repeater Jamming Suppression Method Based on Reconstruction and Cancellation With Slice Matching

The interrupted sampling repeater jamming (ISRJ) is a type of active coherent jamming based on digital radio frequency memory (DRFM) technology, which can form multiple false targets and pose serious threats to the radar system. Conventional reconstruction and cancellation methods rely on the estimation of various parameters. Therefore, the accumulation of the estimation errors of multiple parameters may cause anti-jamming performance degradation. To solve the problem mentioned above, in this article, we propose a jamming reconstruction and cancellation method based on slice matching. The method estimates the external edges and a number of jamming slices, which are used to locate the overlapping edges between the continuously forwarding slices. Then, the extracted jamming slice is applied to slice matching to obtain the position of the slice in the radar transmitting signal. The slice in the transmitting signal is subsequently extracted as the reconstructed jamming slice, which is used for jamming cancellation after pulse compressing and amplitude normalizing. The simulation results demonstrate the superior performance of the proposed method.