Ultra Low RCS Measurement Using Doppler Frequency Shift

A new clutter removal method is proposed for ultra-low RCS measurement in anechoic chamber. In the proposed method, the target is moved along the line of sight of the radar in a sinusoidal manner. This movement generates some Doppler frequency shift. At the receiver, a filter matched to this Doppler...

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Bibliographic Details
Published in:Applied Computational Electromagnetics Society journal 2014-01, Vol.29 (1), p.99
Main Authors: Kashani, E S, Norouzi, Y, Tavakoli, A, Dehkhoda, P
Format: Article
Language:English
Subjects:
Anechoic chambers
Clutter
Frequency shift
Matched filters
Moving targets
Noise levels
Radar cross sections
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Summary:A new clutter removal method is proposed for ultra-low RCS measurement in anechoic chamber. In the proposed method, the target is moved along the line of sight of the radar in a sinusoidal manner. This movement generates some Doppler frequency shift. At the receiver, a filter matched to this Doppler shifter signal is implemented digitally. While the matched filter removes clutter signal largely it preserves the echo from the moving target. As it is shown through analytic estimation as well as simulations, the method can attenuate the clutter and noise level far beyond previously suggested methods. It also removes some of the difficulties in higher frequencies that exist in previous methods.
ISSN:1054-4887
1943-5711