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Sensors 2017, 17(5), 993; doi:10.3390/s17050993

Micro-Doppler Ambiguity Resolution for Wideband Terahertz Radar Using Intra-Pulse Interference

College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Author to whom correspondence should be addressed.
Academic Editor: Ram Narayanan
Received: 29 March 2017 / Revised: 24 April 2017 / Accepted: 27 April 2017 / Published: 29 April 2017
(This article belongs to the Section Remote Sensors)
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Abstract

Micro-Doppler, induced by micro-motion of targets, is an important characteristic of target recognition once extracted via parameter estimation methods. However, micro-Doppler is usually too significant to result in ambiguity in the terahertz band because of its relatively high carrier frequency. Thus, a micro-Doppler ambiguity resolution method for wideband terahertz radar using intra-pulse interference is proposed in this paper. The micro-Doppler can be reduced several dozen times its true value to avoid ambiguity through intra-pulse interference processing. The effectiveness of this method is proved by experiments based on a 0.22 THz wideband radar system, and its high estimation precision and excellent noise immunity are verified by Monte Carlo simulation. View Full-Text
Keywords: terahertz radar; micro-Doppler ambiguity resolution; intra-pulse interference; micro-motion parameter estimation terahertz radar; micro-Doppler ambiguity resolution; intra-pulse interference; micro-motion parameter estimation
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MDPI and ACS Style

Yang, Q.; Qin, Y.; Deng, B.; Wang, H.; You, P. Micro-Doppler Ambiguity Resolution for Wideband Terahertz Radar Using Intra-Pulse Interference. Sensors 2017, 17, 993.

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