Journal ArticleDOI
24-GHz Impedance-Modulated BPSK Tags for Range Tracking and Vital Signs Sensing of Multiple Targets Using an FSK Radar
TLDR
In this article, a fully integrated binary phase shift keying (BPSK) tag is presented to work in conjunction with narrowband FSK radar for concurrent multitarget range tracking and vital signs sensing.Abstract:
In this article, fully integrated binary phase shift keying (BPSK) tags are presented to work in conjunction with narrowband frequency-shift keying (FSK) radar for concurrent multitarget range tracking and vital signs sensing. Without the employment of any radio frequency (RF) mixer, the developed BPSK tag introduces a frequency offset by generating periodic phase shifts to the radar carrier frequencies with optimized power level. The theory of BPSK tag-based range tracking and vital signs sensing in conjunction with FSK radar signal is developed. An impedance-modulated 24-GHz tag architecture without any active RF components is proposed and its implementation and characterization are presented. The system performance is evaluated in the following residential indoor scenarios: single tag ranging, concurrent multiple tags and an untagged human target detection, and multiple tagged human targets tracking. Promising ranging performance demonstrates the potential for the proposed system to be adopted in various indoor tracking applications.read more
Citations
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Journal ArticleDOI
Human Presence Sensing and Gesture Recognition for Smart Home Applications With Moving and Stationary Clutter Suppression Using a 60-GHz Digital Beamforming FMCW Radar
TL;DR: In this article, a novel method for suppressing both moving and stationary clutters in an indoor environment to localize stationary human subjects with a millimeter-wave frequency-modulated continuous-wave (FMCW) radar was presented.
Journal ArticleDOI
Visual tracking in complex scenes: A location fusion mechanism based on the combination of multiple visual cognition flows
TL;DR: Zhang et al. as mentioned in this paper introduced an original location fusion mechanism based on multiple visual cognition processing streams to achieve real-time and efficient visual monitoring in complex scenes, and they proposed a process for extracting multiple forms of visual cognitive information, and it is periodically used to extract multiple feature information flows of a target of interest.
Journal ArticleDOI
A Review on Low-Cost Microwave Doppler Radar Systems for Structural Health Monitoring
Davi V. Q. Rodrigues,Changzhi Li +1 more
TL;DR: In this paper, the authors review the recent technical advances in low-cost Doppler radar systems for phase-demodulated displacement measurements and time-Doppler analysis for structural health information, including digital signal processing and emerging applications related to radar sensor networks.
Proceedings ArticleDOI
A K-Band Broadband Binary Phase Shifter
TL;DR: In this paper , a K-band binary phase shifter that utilizes the architecture of a 180° rat-race coupler is presented, which has constant power usage and low insertion loss in its active states.
Proceedings ArticleDOI
A K-Band Broadband Binary Phase Shifter
TL;DR: A K-Band binary phase shifter that utilizes the architecture of a 180° rat-race coupler to create a binary system that has constant power usage and low insertion loss in its active states.
References
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Adaptive equalization
TL;DR: This tutorial paper gives an overview of the current state of the art in adaptive equalization and discusses the convergence and steady-state properties of least mean-square (LMS) adaptation algorithms, including digital precision considerations, and three classes of rapidly converging adaptive equalizer algorithms.
Journal ArticleDOI
Range correlation and I/Q performance benefits in single-chip silicon Doppler radars for noncontact cardiopulmonary monitoring
TL;DR: In this paper, the phase relationship between the received signal and the local oscillator has a significant effect on the demodulation sensitivity, and the null points can be avoided with a quadrature (I/Q) receiver.
Proceedings ArticleDOI
RFID technology and its applications in Internet of Things (IoT)
TL;DR: The technologies ofRFID and IoT are introduced, the applications and challenges of RFID technology used in IoT are discussed, and the applied and challenges are discussed.
Journal ArticleDOI
Random Body Movement Cancellation in Doppler Radar Vital Sign Detection
Changzhi Li,Jenshan Lin +1 more
TL;DR: It is shown that if the dc offset of the baseband signal is accurately calibrated, both demodulation techniques can be used for random body movement cancellation in quadrature Doppler radar noncontact vital sign detection.
Journal ArticleDOI
A Review on Recent Progress of Portable Short-Range Noncontact Microwave Radar Systems
Changzhi Li,Zhengyu Peng,Tien-Yu Huang,Tenglong Fan,Fu-Kang Wang,Tzyy-Sheng Horng,Jose-Maria Munoz-Ferreras,Roberto Gomez-Garcia,Lixin Ran,Jenshan Lin +9 more
TL;DR: This paper reviews recent progress of portable short-range noncontact microwave radar systems for motion detection, positioning, and imaging applications and discusses potential future developments for the next-generation portable smart radar systems.
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