ECCM scheme against interrupted sampling repeater jammer based on time-frequency analysis  

作　　者：Shixian Gong Xizhang Wei Xiang Li 

机构地区：[1]School of Electronic Science and Engineering, National University of Defense Technology

出　　处：《Journal of Systems Engineering and Electronics》2014年第6期996-1003,共8页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61271442)

摘　　要：The interrupted sampling repeater jamming（ISRJ） is an effective deception jamming method for coherent radar, especially for the wideband linear frequency modulation（LFM） radar. An electronic counter-countermeasure（ECCM） scheme is proposed to remove the ISRJ-based false targets from the pulse compression result of the de-chirping radar. Through the time-frequency（TF） analysis of the radar echo signal, it can be found that the TF characteristics of the ISRJ signal are discontinuous in the pulse duration because the ISRJ jammer needs short durations to receive the radar signal. Based on the discontinuous characteristics a particular band-pass filter can be generated by two alternative approaches to retain the true target signal and suppress the ISRJ signal. The simulation results prove the validity of the proposed ECCM scheme for the ISRJ.The interrupted sampling repeater jamming（ISRJ） is an effective deception jamming method for coherent radar, especially for the wideband linear frequency modulation（LFM） radar. An electronic counter-countermeasure（ECCM） scheme is proposed to remove the ISRJ-based false targets from the pulse compression result of the de-chirping radar. Through the time-frequency（TF） analysis of the radar echo signal, it can be found that the TF characteristics of the ISRJ signal are discontinuous in the pulse duration because the ISRJ jammer needs short durations to receive the radar signal. Based on the discontinuous characteristics a particular band-pass filter can be generated by two alternative approaches to retain the true target signal and suppress the ISRJ signal. The simulation results prove the validity of the proposed ECCM scheme for the ISRJ.

关 键 词：interrupted sampling repeater jamming（ISRJ） de-chirping radar time-frequency（TF） electronic counter-countermeasure（ECCM） 

分 类 号：TN974[电子电信—信号与信息处理] TN972[电子电信—信息与通信工程]