期刊
IEEE ACCESS
卷 10, 期 -, 页码 65000-65010出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2022.3184017
关键词
Backscatter; Bit error rate; Internet of Things; Optimization; Radio frequency; Channel estimation; Wireless networks; Ambient backscatter communication; intelligent reflecting surface (IRS); interference cancellation; bit error rate; multiple antennas; Internet of Things (IoT)
资金
- Australian Research Council's Discovery Project Funding Scheme [DP170100939]
Passive technologies like AmBC and IRS have great potential for providing ubiquitous connectivity to IoT devices in future wireless networks. However, AmBC has not been able to fulfill its potential due to interference from direct-link signals, limiting its transmission rate and range. In this work, we propose a novel scheme using an IRS to improve the detection performance of an AmBC system, ultimately enhancing the signal quality.
Passive technologies like ambient backscatter communication (AmBC) and intelligent reflecting surface (IRS) hold enormous potential for ubiquitous connectivity of Internet of Things (IoT) devices in future wireless networks. However, despite many research efforts, AmBC has so far been unable to fulfil its potential for widespread deployment, due to the weakness of backscatter signal in the presence of strong direct-link interference from the original RF source. This limits the bit error rate (BER) and hence the transmission rate and range of AmBC systems. Meanwhile, the IRS offers new degrees of freedom in enhancing a variety of systems by transforming their propagation medium and signals. In this work, we devise a novel scheme to improve the detection performance of an AmBC system using an IRS located in its proximity. The IRS augments the backscatter signal quality at the receiver by adjusting its phase shifts to balance signal strengths, ultimately improving the performance of energy detection at the receiver. Our results clearly show that an IRS of reasonable size can considerably improve the BER performance of ambient backscatter, which is an important improvement for low power IoT systems.
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