Open AccessFull‐duplex ambient backscatter with physical layer network coding
Author(s) -
Xu Baoyi,
Xiang Zheng,
Ren Peng,
Guo Xiaomeng
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2019.1302
Subject(s) - computer science , physical layer , electronic engineering , single antenna interference cancellation , coding (social sciences) , linear network coding , wireless , telecommunications , decoding methods , computer network , engineering , statistics , mathematics , network packet
Ambient backscatter which utiliees the ambient radio‐frequency signals to enable transmissions between battery‐less devices has attracted considerable attention in academia and industry. This study addresses the questions of full‐duplex (FD) and self‐interference cancellation (SIC) for ambient backscatter which adopts dual‐antenna structure to achieve persistent information transmission and energy harvesting. The authors construct the physical‐layer network coding (PNC) mapping principle of on–off keying in the dual‐antenna structure and propose the PNC‐based FD algorithm to eliminate the self‐interference in the information domain. Furthermore, the bit‐error‐ratio and throughput performances are analysed under conventional half‐duplex mode and the proposed FD mode, respectively. In order to facilitate system complexity and reduce power consumption, they design a hardware prototype to achieve SIC which consists of low‐power passive analogue components. Numerical results are provided to confirm the theoretical studies. Circuit simulations demonstrate that the circuit is commendably consistent with the design concept.