Increasing the anti-electronic warfare capability of multiple-input-multiple-output frequency multiplex radars by assigning random frequencies to array elements

Document Type : Original Article

Authors

1 Master student, Shahid Sattari University of Aeronautical Sciences and Technology, Tehran, Iran

2 Assistant Professor, Shahid Sattari University of Aviation Sciences and Technology, Tehran, Iran

Abstract

The radar design, using the FDA technique, basically resists the well-known ECM methods and increases the power of the ECCM. In this research, ECCM techniques are first discussed. The following is a history of the subject, and it is examined that what are the advantages of phased array radars and frequency arrays and the reason for going to the FDA radars is that the radar is dependent on the distance, in addition to its dependence on the angle. In order to improve the idea of using FDA radars, the FDA-MIMO radars were discussed and according to the modeling and simulation results, it was found that the level of the side lobes in FDA-MIMO method decreased (close to 20 dB) compared with the FDA method, and this advantage means that the arrival of disturbing signals from the angles of side lobes is significantly weakened. On the other hand, as a second advantage, the main beam is sharper than the FDA radar (in the FDA radar, the main beam width is about 11 degrees while in the MIMO-FDA is about 4 degrees). The main idea of this thesis is to use the frequency variation of each element in comparison to the previous element in a randomized manner in the FDA-MIMO method. The results show that the proposed method is sharper than the FDA and linear MIMO-FDA method (about 2.5 degrees), in fact, the accuracy of the resolution of the targets has increased and as a second advantage, it has a lower side lobes level (about 20dB below the linear state).

Keywords

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References

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Radar
Volume 10, Issue 2 - Serial Number 28
Number 28, Autumn and Winter Quarterly
January 2023

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History

  • Receive Date: 05 September 2022
  • Revise Date: 11 December 2023
  • Accept Date: 05 January 2023
  • Publish Date: 21 January 2023

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