Gaining from Multiple Ambient Sources: Signaling Matrix for Multi-Antenna Backscatter Devices

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022
Major/Subject
Mcode
Degree programme
Language
en
Pages
5
Series
IEEE WIRELESS COMMUNICATIONS LETTERS, articlenumber 9998995
Abstract
The backscatter device (BD) in ambient backscatter communication (AmBC) systems is often illuminated by multiple ambient sources in reality. Although multiple ambient sources can benefit the AmBC systems, this scenario has been rarely studied. This letter gives an answer to the overlooked question of how to effectively obtain the gain from multiple ambient sourcesusing a proper signaling matrix on a multi-antenna BD. We optimize the BD signaling matrix based on the criterion of minimizing the AmBC system bit-error-rate (BER) performance. The derived signaling matrices combine the ambient signals and steer the backscatter signal toward the receiver to increase the received signal strength. The simulation results show that the multi-antenna BD effectively uses multiple ambient sources, and the derived BD signaling matrices robustly achieve a larger communication range or a higher datarate of AmBC systems.
Description
Keywords
Backscatter, Modulation, Signal to noise ratio, Transmitting antennas, System performance, Linear programming, Eigenvalues and eigenfunctions
Other note
Citation
Wang , X , Yiğitler , H & Jäntti , R 2022 , ' Gaining from Multiple Ambient Sources: Signaling Matrix for Multi-Antenna Backscatter Devices ' , IEEE WIRELESS COMMUNICATIONS LETTERS . https://doi.org/10.1109/LWC.2022.3231907