A frequency‐domain three‐stage algorithm for active deception jamming against synthetic aperture radar. Issue 6 (1st July 2014)

• Record Type: Journal Article
• Authors: Liu, Yongcai; Wang, Wei; Pan, Xiaoyi; Dai, Dahai; Feng, Dejun
• Is Part Of: IET radar, sonar & navigation. Volume 8:Issue 6(2014)
• Page Start: 639
• Page End: 646
• Publication Date: 2014-07-01
• Subjects: synthetic aperture radar -- jamming -- Fourier transforms -- radar signal processing; frequency domain three stage algorithm -- FDTSA -- active deception jamming -- synthetic aperture radar -- jamming signal generation -- computational complexity -- focus depth -- false scatterer -- deception template -- fast Fourier transform -- modulation process -- repeat jammer -- offline stage -- initialisation stage -- real‐time modulation stage; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2013.0222
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : Efficient generation of jamming signal is an important but intractable issue in active deception jamming against synthetic aperture radar. Considerations must be given to both the computational complexity and the focus depth of the false scatterers of a deception template. However, existing methods cannot meet both demands mentioned above when generating jamming signal of an extended false scene or scattered false targets. In this study, a frequency‐domain three‐stage algorithm (FDTSA) is proposed. In theory, the jammer system is deliberately reformatted in the two‐dimensional frequency domain. Accordingly, the implementation of the FDTSA can be effectively accelerated by fast Fourier transform and by separating the modulation process of a repeat jammer into three stages: the offline stage, the initialisation stage and the real‐time modulation stage. Theoretical analyses and simulation results indicate that the FDTSA can get rid of severe focus deterioration of the false scatterers and reasonable computational load is required.