Journal of Systems Engineering and Electronics

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Mathematic principle of active jamming against wideband LFM radar

Shixian Gong1,*, Xizhang Wei1, Xiang Li1, and Yongshun Ling2   

  1. 1. School of Electronic and Information, National University of Defense Technology, Changsha 410073, China;
    2. Electronic Engineering Institute, Hefei 410073, China
  • Online:2015-02-13 Published:2010-01-03


The inherent mathematic principle of active jamming against the wideband linear frequency modulated (LFM) radar is investigated. According to different generation strategies, the active jamming methods are reclassified into three groups, i.e., non-coherent jamming (NCJ), convolution jamming (CJ) and multiplying jamming (MJ). Based on the classification, the mathematic principles of different active jamming groups are put forward, which describe the relationships between the modulated signals and the jamming results. The advantages and disadvantages of different groups are further analyzed, which provides a new perspective for the study of jamming/anti-jamming methods and a potential for engineers to integrate similar jamming methods into one jammer platform. The analyses and simulation results of some typical active jamming methods prove the validity of the proposed mathematics principle.

Key words: linear frequency modulated (LFM), mathematic principle, active jamming