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International Journal of Antennas and Propagation
Volume 2017 (2017), Article ID 6759169, 9 pages
https://doi.org/10.1155/2017/6759169
Research Article

A Method against Interrupted-Sampling Repeater Jamming Based on Energy Function Detection and Band-Pass Filtering

Air and Missile Defense College of Air Force Engineering University, Xi’an, Shanxi 710051, China

Correspondence should be addressed to Chun-yang Wang; moc.361@nc_dgk_ycw

Received 24 November 2016; Revised 26 February 2017; Accepted 12 March 2017; Published 30 March 2017

Academic Editor: Atsushi Mase

Copyright © 2017 Hui Yuan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Interrupted-sampling repeater jamming (ISRJ) is a new kind of coherent jamming to the large time-bandwidth linear frequency modulation (LFM) signal. Many jamming modes, such as lifelike multiple false targets and dense false targets, can be made through setting up different parameters. According to the “storage-repeater-storage-repeater” characteristics of the ISRJ and the differences in the time-frequency-energy domain between the ISRJ signal and the target echo signal, one new method based on the energy function detection and band-pass filtering is proposed to suppress the ISRJ. The methods mainly consist of two parts: extracting the signal segments without ISRJ and constructing band-pass filtering function with low sidelobe. The simulation results show that the method is effective in the ISRJ with different parameters.