Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (5): 997-1003.doi: 10.3969/j.issn.1001-506X.2018.05.06

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Main-beam range deceptive jamming suppression approach with FDA-MIMO radar

LAN Lan1, LIAO Guisheng1, XU Jingwei2, ZHANG Yuhong2   

  1. 1. National Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China; 2. School of Electronic Engineering, Xidian University, Xi’an 710071, China
  • Online:2018-04-28 Published:2018-04-24

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Abstract:

The main-beam deceptive jamming causes the reduction of estimation precision and tracking accuracy of a true target, which is a challenge to the traditional radar systems. In this paper, based on the frequency diverse array (FDA)-multiple input and multiple output (MIMO) radar, an approach to suppress the main-beam range deceptive jamming is proposed. False targets with different transmit frequencies can be generated by retransmitting the intercepted radar’s transmitted waveform after time delay in the false target generation, leading to the time delay or range difference. On the basis of this property, the true and false targets can be firstly distinguished in the joint transmit-receive spatial frequency domain utilizing the range-dependent degrees-of-freedom in the FDA radar. Subsequently, due to the range mismatch, all false targets are suppressed by designing a range-angle two dimensional adaptive matched filter. With the proposed method, the main-beam range deceptive jamming can be effectively suppressed. Hence, the anti-interference performance of the radar in the complicated electromagnetic environment is improved. Simulation examples are provided to demonstrate the effectiveness of the proposed approach.

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