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Sensors 2017, 17(1), 123; doi:10.3390/s17010123

High-Performance Anti-Retransmission Deception Jamming Utilizing Range Direction Multiple Input and Multiple Output (MIMO) Synthetic Aperture Radar (SAR)

1,* , 2,3,* , 1
and
2,3
1
Aeronautics and Astronautics Engineering College, Air Force Engineering University, Xi’an 710038, China
2
School of Electronics and Information Engineering, Beihang University, Beijing 100084, China
3
Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Cheng Wang
Received: 24 October 2016 / Revised: 26 December 2016 / Accepted: 4 January 2017 / Published: 9 January 2017
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [4266 KB, uploaded 9 January 2017]   |  

Abstract

Retransmission deception jamming seriously degrades the Synthetic Aperture Radar (SAR) detection efficiency and can mislead SAR image interpretation by forming false targets. In order to suppress retransmission deception jamming, this paper proposes a novel multiple input and multiple output (MIMO) SAR structure range direction MIMO SAR, whose multiple channel antennas are vertical to the azimuth. First, based on the multiple channels of range direction MIMO SAR, the orthogonal frequency division multiplexing (OFDM) linear frequency modulation (LFM) signal was adopted as the transmission signal of each channel, which is defined as a sub-band signal. This sub-band signal corresponds to the transmission channel. Then, all of the sub-band signals are modulated with random initial phases and concurrently transmitted. The signal form is more complex and difficult to intercept. Next, the echoes of the sub-band signal are utilized to synthesize a wide band signal after preprocessing. The proposed method will increase the signal to interference ratio and peak amplitude ratio of the signal to resist retransmission deception jamming. Finally, well-focused SAR imagery is obtained using a conventional imaging method where the retransmission deception jamming strength is degraded and defocused. Simulations demonstrated the effectiveness of the proposed method. View Full-Text
Keywords: SAR; MIMO; jamming suppression; range direction; sub-band synthesize SAR; MIMO; jamming suppression; range direction; sub-band synthesize
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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. (CC BY 4.0).

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Wang, R.; Chen, J.; Wang, X.; Sun, B. High-Performance Anti-Retransmission Deception Jamming Utilizing Range Direction Multiple Input and Multiple Output (MIMO) Synthetic Aperture Radar (SAR). Sensors 2017, 17, 123.

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