Journal ArticleDOI
A Portable Real-Time Digital Noise Radar System for Through-the-Wall Imaging
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TLDR
A portable, digital, real-time random noise radar system operating in the ultrahigh frequency range for through-the-wall detection and imaging and its capability to image target scenes and characterize human activity from different stand-off distances is demonstrated.Abstract:
We present the design and implementation of a portable, digital, real-time random noise radar system operating in the ultrahigh frequency range for through-the-wall detection and imaging. Noise radar technology is combined with modern digital signal processing approaches to architect a system to covertly perform range imaging of obscured stationary and moving targets as well as to detect the presence of humans via micro-Doppler detection combined with empirical mode decomposition. We model the propagation and sampling nonidealities in the system and propose techniques to overcome the effect of these nonidealities. Experimental results demonstrate the system's capability to image target scenes and characterize human activity from different stand-off distances.read more
Citations
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Journal ArticleDOI
Frequency-Modulated Interrupted Continuous Wave as Wall Removal Technique in Through-the-Wall Imaging
TL;DR: In this paper, the authors proposed frequency-modulated interrupted continuous wave (FMICW) signals as a novel wall removal technique and validate its effectiveness through numerical simulations and experiments performed using a radar system built for the purpose.
A 532 nm chaotic lidar transmitter for high resolution underwater ranging and imaging
TL;DR: In this paper, a chaotic lidar transmitter based on an ultra-long cavity fiber laser is presented for underwater ranging and imaging applications, with 150 mW continuous output power at 532 nm, with wideband (>3 GHz) chaotic intensity modulation.
Proceedings ArticleDOI
Analysis of polarimetric multistatic human micro-Doppler classification of armed/unarmed personnel
TL;DR: The use of multistatic micro-Doppler signatures to distinguish between unarmed and armed personnel moving is described and the effect of polarimetry on the classification accuracy is evaluated.
Proceedings ArticleDOI
Classification and modeling of human activities using empirical mode decomposition with s-band and millimeter-wave micro-doppler radars
TL;DR: The ability of SVMs and EMD to accurately identify human movements based on their micro-Doppler signatures obtained from S-band and millimeter-wave radar systems is discussed.
Journal ArticleDOI
Micro-Doppler Based Target Recognition With Radars: A Review
TL;DR: In this paper , the authors present the evolution and recent advances in radar micro-Doppler-based signature analysis and feature extraction, as well as their applications in defense and commercial sectors.
References
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Journal ArticleDOI
Through-wall imaging (TWI) by radar: 2-D tomographic results and analyses
TL;DR: It has been shown that using multifrequency data high-quality image reconstruction can be achieved with a limited array view.
Journal ArticleDOI
Noise radar using random phase and frequency modulation
TL;DR: Computer algorithms for reference signal delay and compression are discussed as replacements for the classical delay line implementation and the ambiguity function and the statistical characteristics of the correlation output for the latter configuration are further analyzed.
Journal ArticleDOI
Three-Dimensional Wideband Beamforming for Imaging Through a Single Wall
TL;DR: This letter extends the analysis to 3D imaging via delay-and-sum beamforming in the presence of a single uniform wall to provide valuable information on target heights that can be used for enhancing target discrimination/identification.
Journal ArticleDOI
Noise-Modulated Distance Measuring Systems
TL;DR: The resulting system is similar to existing altimeters but is free of the ambiguities inherent in periodically modulated systems, avoids the "fixed error," and is capable of measuring distances down to a few feet, which makes it particularly suited for use as an altimeter in blind landing systems.
Journal ArticleDOI
Design, performance, and applications of a coherent ultra-wideband random noise radar
TL;DR: The unique design features of the ultra-wideband radar system are described, the theoretical foundations of noise polarimetry are developed, experimental evidence of the polarimetric and resolution capa-bilities of the system are provided, and results obtained in subsurfaceprobing applications are demonstrated.