24-GHz Impedance-Modulated BPSK Tags for Range Tracking and Vital Signs Sensing of Multiple Targets Using an FSK Radar

Jing Wang, Daniel Rodriguez, Ashish Mishra, Prateek Reddy Nallabolu, Tanja Karp, Changzhi Li

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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.

Original languageEnglish
Article number9316930
Pages (from-to)1817-1828
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Volume69
Issue number3
DOIs
StatePublished - Mar 2021

Keywords

  • Binary phase shift keying (BPSK)
  • frequency-shift keying (FSK) radar
  • identification and tracking
  • multiple targets
  • range tracking
  • vital signs sensing
  • wireless sensor

Fingerprint Dive into the research topics of '24-GHz Impedance-Modulated BPSK Tags for Range Tracking and Vital Signs Sensing of Multiple Targets Using an FSK Radar'. Together they form a unique fingerprint.

Cite this