TY - JOUR
T1 - 24-GHz Impedance-Modulated BPSK Tags for Range Tracking and Vital Signs Sensing of Multiple Targets Using an FSK Radar
AU - Wang, Jing
AU - Rodriguez, Daniel
AU - Mishra, Ashish
AU - Nallabolu, Prateek Reddy
AU - Karp, Tanja
AU - Li, Changzhi
N1 - Funding Information:
Manuscript received July 27, 2020; revised October 2, 2020; accepted October 28, 2020. Date of publication January 8, 2021; date of current version March 4, 2021. This work was supported by the National Science Foundation (NSF) under Grant ECCS-2030094, Grant 2028863, and Grant 1808613. (Corresponding author: Jing Wang.) The authors are with the Department of Electrical and Computer Engineering, Texas Tech University (TTU), Lubbock, TX 79409 USA (e-mail: anna.wang@ttu.edu; daniel-fernando.rodriguez@ttu.edu; ashish.mishra@ttu.edu; prateek-reddy.nallabolu@ttu.edu; tanja.karp@ttu.edu; changzhi.li@ttu.edu).
Publisher Copyright:
© 1963-2012 IEEE.
PY - 2021/3
Y1 - 2021/3
N2 - 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.
AB - 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.
KW - Binary phase shift keying (BPSK)
KW - frequency-shift keying (FSK) radar
KW - identification and tracking
KW - multiple targets
KW - range tracking
KW - vital signs sensing
KW - wireless sensor
UR - http://www.scopus.com/inward/record.url?scp=85099566067&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2020.3045201
DO - 10.1109/TMTT.2020.3045201
M3 - Article
AN - SCOPUS:85099566067
VL - 69
SP - 1817
EP - 1828
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 3
M1 - 9316930
ER -