Enhanced Dynamic Range Power Independent Doppler Frequency Estimation System

A Doppler shift estimation system with relatively high dynamic range is conceived and demonstrated. The scheme is based on dual mixing the modulated radar echo and frequency to voltage mapping. Hence, it needs no radio frequency auxiliary part. This makes the system capable of becoming integrated in...

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Bibliographic Details
Published in:IEEE sensors journal 2018-04, Vol.18 (8), p.3190-3197
Main Authors: Emami, Hossein, Hajihashemi, Mohammadreza, Alavi, Sayed Ehsan, Raahemifar, Kaamran, Supaat, Abu Sahmah Mohd
Format: Article
Language:English
Subjects:
Doppler effect
Doppler measurements
Doppler radar
Frequency modulation
locked amplifiers
Optical sensors
optical signal processing
Radar
Radio frequency
Spaceborne radar
spread spectrum radar
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Summary:A Doppler shift estimation system with relatively high dynamic range is conceived and demonstrated. The scheme is based on dual mixing the modulated radar echo and frequency to voltage mapping. Hence, it needs no radio frequency auxiliary part. This makes the system capable of becoming integrated into any photonic radar, which would positively affect the cost and size of such system. Since the mixing procedure is all-optical, the system is able to identify the Doppler frequency of a radar echo with carrier frequency as high as 40 GHz independent of its amplitude. The system dynamic range can be as high as 42 dB at 10-GHz radar carrier with an acceptable error of 5%. This dynamic range was achieved using lock-in amplification technique.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2018.2810699