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access icon openaccess Micro-motion feature extraction of space targets based on sinusoidal frequency modulation Fourier transform

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 25/02/2019, Accepted 08/05/2019, Published 13/08/2019

The space target can be discriminated from other objects by the micro-motion feature difference. The micro-motion features of a space target with precession include the spinning period, the precession angle and the precession period etc. The main work of this study is to extract the target micro-motion period from the echo by sinusoidal frequency modulation Fourier transform (SFMFT). The proposed method takes the advantages of the phase terms operation of the SFMFT. In the study, the micro-Doppler effect induced by precession is analysed and then present the algorithm step by step. Meanwhile, the simulation is given to demonstrate the validity of the proposed method.

Inspec keywords: radar tracking; target tracking; aerospace instrumentation; radar signal processing; amplitude estimation; Fourier transforms; Doppler radar; FM radar; feature extraction

Other keywords: micromotion feature extraction; sinusoidal frequency modulation Fourier transform; SFMFT; precession angle; micromotion feature difference; target micromotion period; space target; microDoppler effect; precession period; spinning period

Subjects: Signal processing and detection; Aerospace instrumentation and equipment; Radar equipment, systems and applications; Other topics in statistics; Integral transforms

References

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http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2019.0650
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