volume | PIER Journals

2022-10-26

Electromagnetic Simulation for Robust Recognition Algorithm of Radar Target by Homing Missiles

Alaa G. A. Abd-Elfattah,

Dr. Alaa G. A. Abd-Elfattah

High Institute of Electronic Engineering

Egypt

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Khalid Fawzy Ahmed Hussein,

Professor Khalid Fawzy Ahmed Hussein

Microwave Engineering Department

Electronics Research Institute

Egypt

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Asmaa Elsayed Farahat,

Dr. Asmaa Elsayed Farahat

Microwave Engineering Department

Electronics Research Institute

Egypt

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Magdy A. Kotb

Dr. Magdy A. Kotb

Faculty of Engineering

Menoufia University

Egypt

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Progress In Electromagnetics Research B, Vol. 97, 37-54, 2022

doi:10.2528/PIERB22091508

Abstract

A novel signal processing scheme for identification of jet fighter targets by the onboard radar of active and hybrid homing missiles is proposed in the present work. For a specific target, the frequencies of the internal resonances of the cavity-backed apertures existing as the air-inlet pipes of the jet engine are used to construct an interior signature function for the proposed target identification scheme. For the purpose of quantitative description and assessment of the proposed scheme, electromagnetic simulation is used where the air-inlet pipe is modeled as an open-ended conducting cylinder with a number of radial conducting blades placed inside the cylindrical cavity near the open end. The transmitted radar pulse is formed by frequency chirping using linear frequency modulation (LFM) to include the frequencies in the band 1.0--2.0\,GHz with high sweep resolution. The selected frequency band is wide enough to distinguish among various jet fighter targets. The CST® simulator is used to evaluate the radar cross section (RCS) of the open-ended pipe model with the internal blades due to an incident chirped pulsed plane wave as mentioned above over the frequency band 1.0-2.0 GHz. The proposed target identification algorithm is mathematically described and computationally applied to identify different targets with different dimensions of the jet engine pipe. The effect of the additive white Gaussian noise (AWGN) on the correctness of the target identification decision using the proposed scheme is investigated by calculating the false alarm rate (FAR) with varying the signal-to-noise ratio (SNR). The numerical examinations show that the proposed algorithm succeeds in taking the correct decision regarding the target identification with FAR<10% for SNR} ≥ 12 dB.

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Alaa G. A. Abd-Elfattah, Khalid Fawzy Ahmed Hussein, Asmaa Elsayed Farahat, and Magdy A. Kotb, "Electromagnetic Simulation for Robust Recognition Algorithm of Radar Target by Homing Missiles," Progress In Electromagnetics Research B, Vol. 97, 37-54, 2022.
doi:10.2528/PIERB22091508

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