Orientation sensing using backscattered phase from multi-antenna tag at 5.8 GHz

Abstract

Object localization is one of the most important applications of RFID technology. In this paper, we demonstrate how fine-scale orientation can be estimated from a multi-antenna backscatter tag. Three basic orientation changes -tag roll, pitch and yaw -were considered, where roll and pitch maneuvers were successfully identified from the direction of phase rotation. Moreover, an inclination of 5 • in roll and pitch maneuvers was successfully identified by measuring the phase difference with 15% and 8% error respectively. The analysis can be extended to any amount of inclination.

Hybrid Inertial Microwave Reflectometry for mm-Scale Tracking in RFID Systems

“…Our work investigated, introduced, and extended the nascent HIMR concept to a three-dimensional technique (adding multiple readers), while adding extra sensor data (gyrometry and mangetometry), enhanced orientation sensing (designing multiantenna tags [85]), additional RF signature information (through frequency hopping [86]), and overall range (sensors equipped with QTRs [87]).…”

Backscatter Wireless Communications and Sensing in Green Internet of Things

“…BackCom systems can be categorized based on their excitation source into monostatic, bistatic and ambient BackCom. In monostatic BackCom [23]- [25], a dedicated exciter (reader) sends a carrier signal whenever it wants to communicate with the tag. The tag then reflects the carrier signal back to the reader.…”

Backscatter communication-based wireless sensing (BBWS): Performance enhancement and future applications

“…Hence, there is always a stable and high energy carrier signal for energy harvesting and reflection at the tag. This category is further divided into monostatic (Durgin, 2015;Wang et al, 2019a;Akbar et al, 2016) (centralized exciter and receiver) and bistatic architecture (Kimionis et al, 2012(Kimionis et al, , 2013 (distributed exciter and receiver). In the non-dedicated source architecture, a carrier signal originally meant for other communication purposes (FM radio (Daskalakis et al, 2017), TV or WiFi (Liu et al, 2013)) is exploited to achieve BackCom.…”

“…Tracking of robotic tasks using BackCom was implemented in (Luo et al, 2019;Zhang et al, 2019a) while unmanned aerial vehicle (UAV) tracking applications were implemented in (Ma et al, 2017;Zhang et al, 2020b). Lastly, applications that require tracking the orientation of objects and the human body by exploiting phase changes in the tag's backscatter signal were presented in (Akbar et al, 2016;Jiang et al, 2019;Jin et al, 2018a).…”