4.7 Article

Power Beacon Placement for Maximizing Guaranteed Coverage in Bistatic Backscatter Networks

期刊

IEEE TRANSACTIONS ON COMMUNICATIONS
卷 69, 期 11, 页码 7895-7909

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2021.3109263

关键词

Backscatter; Lead; Radio frequency; Relays; Fading channels; Topology; Radiofrequency identification; Bistatic backscatter communication; coverage; placement optimization; power beacons

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This paper studies the placement of power beacons (PBs) in bistatic backscatter networks to maximize the guaranteed coverage distance (GCD). By optimizing a symmetric PB placement scheme, the optimal PB placement is obtained. Numerical results provide insights into the impact of system parameters on PB placement and the resulting GCD, as well as the advantages of the adopted symmetric placement scheme over other benchmark schemes.
The bistatic backscatter architecture, with its extended range, enables flexible deployment opportunities for backscatter devices. In this paper, we study the placement of power beacons (PBs) in bistatic backscatter networks to maximize the guaranteed coverage distance (GCD), defined as the distance from the reader within which backscatter devices are able to satisfy a given quality-of-service constraint. This work departs from conventional energy source placement problems by considering the performance of the additional backscatter link on top of the energy transfer link. We adopt and optimize a symmetric PB placement scheme to maximize the GCD. The optimal PB placement under this scheme is obtained using either analytically tractable expressions or an efficient algorithm. Numerical results provide useful insights into the impacts of various system parameters on the PB placement and the resulting GCD, plus the advantages of the adopted symmetric placement scheme over other benchmark schemes.

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