What is it about?
Self-protection deceptive jammers create at the radar receiver output multiple false targets that are impossible to isolate in both time and frequency domains. In this paper, we introduce a novel technique based on fractional Fourier transform to discriminate between the true target echo and those false targets in the case of frequency-shifting jammers. In fact, we exploit the capability of the fractional Fourier transform to resolve, in a matched manner, spectra that are overlapping in time and frequency. This is a property that cannot be achieved using a standard matched filters. The theoretical analysis of this technique is presented and its effectiveness is verified by simulation.
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Why is it important?
The proposed anti-jamming can counter different types of frequency-shift jammers against chirp radars
Perspectives
The proposed technique is better than other ECCM techniques that require a high SNR or assume that jamming pulses lag behind the true target echo that is not true in the case of instantly retransmitting the radar pulse after frequency-shifting.
Dr. Ing. Samer Baher Safa Hanbali
Higher Institute for Applied Science and Technology
Read the Original
This page is a summary of: Fractional Fourier transform-based chirp radars for countering self-protection frequency-shifting jammers, International Journal of Microwave and Wireless Technologies, April 2017, Cambridge University Press,
DOI: 10.1017/s1759078717000289.
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