Cooperative Ambient Backscatter Communications for Green Internet-of-Things
By Gang Yang, Qianqian Zhang, Ying-Chang Liang. IEEE Internet of Things Journal, 2018
358 citations recorded by the source corpus.
Ambient backscatter communication (AmBC) enables a passive backscatter device to transmit information to a reader using ambient RF signals, and has emerged as a promising solution to green Internet-of-Things (IoT). Conventional AmBC receivers are interested in recovering the information from the ambient backscatter device (A-BD) only. In this paper, we propose a cooperative AmBC (CABC) system in which the reader recovers information not only from the A-BD, but also from the RF source. We first establish the system model for the CABC system from spread spectrum and spectrum sharing perspectives. Then, for flat fading channels, we derive the optimal maximum-likelihood (ML) detector, suboptimal linear detectors as well as successive interference-cancellation (SIC) based detectors. For frequency-selective fading channels, the system model for the CABC system over ambient orthogonal frequency division multiplexing carriers is proposed, upon which a low-complexity optimal ML detector is derived. For both kinds of channels, the bit-error-rate expressions for the proposed detectors are derived in closed forms. Finally, extensive numerical results have shown that, when the A-BD signal and the RF-source signal have equal symbol period, the proposed SIC-based detectors can achieve near-ML detection performance for typical application scenarios, and when the A-BD symbol period is longer than the RF-source symbol period, the existence of backscattered signal in the CABC system can enhance the ML detection performance of the RF-source signal, thanks to the beneficial effect of the backscatter link when the A-BD transmits at a lower rate than the RF source.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/dca5faa3bc3b7a875f184830e17582f2cc01ca90
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Citations in the corpus
- Federated learning for 6G communications: Challenges, methods, and future directions (2020, background): “ackscatter communication, that enables network devices to utilize ambient RF signals to transmit information without requiring active RF transmission, making battery-free communication possible [11], [13]. Smart energy management CHINA COMMUNICATIONS 3 is another promising mechanism with the goal of”
- A Survey on Green 6G Network: Architecture and Technologies (2019, background): “out requiring active RF transmission, making battery-free communication possible [79].”
- Symbiotic Radio: A New Communication Paradigm for Passive Internet of Things (2018, background): “In [13], a cooperative receiver with multiple antennas is designed to decode both the primary signal and the backscattered signal.”
- Large Intelligent Surface/Antennas (LISA): Making Reflective Radios Smart (2019, background): “Apromising solution to suppress the direct-link interference in AmBC is to deploy a cooperative receiver, which jointly recovers both primary and RD’s signals [24]–[26].”
- Ambient Backscatter Communications: A Contemporary Survey (2017, background): “[146] introduce a successive interferencecancellation (SIC) based detector to improve BER performance of ABCSs.”
- Intelligent Reflecting Surface: A Programmable Wireless Environment for Physical Layer Security (2019, neutral): “Besides, IRS only attempts to assist the transmission of the signals between the intended transmitter and receiver pair with no intention for its own information transmission while backscatter communication needs to support the information transmission of the backscatter device [16], [17].”