Analysis and Simulation of the Effect of Baselines Length Differences on Performance Improvement of Dual-Loop Retrodirective Cross-Eye Jamming

Document Type : Original Article

Authors

1 Khatam al Anbia University

2 master of science, shahid sattari aeronautical university

3 دانشگاه علوم و فنون هوایی شهید ستاری

Abstract

Cross-Eye jamming is a type of electronic attack techniques. Cross-Eye jamming is analyzed based on Glint's physical phenomenon. This technique generates an angular error in monopulse tracking radars that are resistant to other electronic attack methods. A multiloop retrodirective implementation method has been proposed to obtain the angular permutation error and the appropriate ratio of the JSR in the jammer. In this type of implementation, the length difference of the jammer loop can cause the phase difference of the signal that is sent to the victim radar. The signal phase difference will increase the probability of beacon operation. Beacon operation is a destructive function in cross-eye jamming. In the previous work, the phase difference in the range of -180 to +180 degrees was calculated and analyzed. This analysis increases the computational complexity of the system without the need to impose it. According to this analysis, there is a need for tradeoff between the cross-eye gain and the probability of beacon operation. In this paper, phase difference is considered as a function of baseline length and jammer angle with radar. This analysis is based on the relationships governing the phase difference, path length, and frequency of transmission. This type of analysis has less computational complexity and makes the results more practical. The simulation results by MATLAB show that if dc2≤15m, there will be no chance of beacon operation. On this basis, other jammer parameters can be calculated without the probability of beacon operation to increase cross-eye gain.

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References

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Journal of Advanced Defense Science & Technology
Volume 11, Issue 3 - Serial Number 41
November 2020
Pages 251-261

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History

  • Receive Date: 06 October 2019
  • Revise Date: 30 November 2019
  • Accept Date: 30 December 2019
  • Publish Date: 22 September 2020

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