Symbol Detection of Ambient Backscatter Systems With Manchester Coding

Ambient backscatter communication is a newly emerged paradigm, which utilizes the ambient radio frequency signal as the carrier to reduce the system battery requirement, and is regarded as a promising solution for enabling large-scale deployment of future Internet of Things networks. The key issue o...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2018-06, Vol.17 (6), p.4028-4038
Main Authors: Tao, Qin, Zhong, Caijun, Lin, Hai, Zhang, Zhaoyang
Format: Article
Language:English
Subjects:
ambient backscatter
Backscatter
BER
Bit error rate
Detectors
Encoding
Internet of Things
IoT
Manchester coding
Radio frequency
RF signals
symbol detection
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Summary:Ambient backscatter communication is a newly emerged paradigm, which utilizes the ambient radio frequency signal as the carrier to reduce the system battery requirement, and is regarded as a promising solution for enabling large-scale deployment of future Internet of Things networks. The key issue of ambient backscatter communication systems is how to perform reliable detection. In this paper, we propose novel encoding methods at the information tag and devise the corresponding symbol detection methods at the reader. In particular, Manchester coding and differential Manchester coding are adopted at the information tag, and the corresponding semi-coherent Manchester (SeCoMC) and non-coherent Manchester (NoCoMC) detectors are developed. In addition, analytical bit-error-rate (BER) expressions are characterized for both detectors assuming either complex Gaussian or unknown deterministic ambient signal. Simulation results show that the BER performance of unknown deterministic ambient signal is better, and the SeCoMC detector outperforms the NoCoMC detector. Finally, compared with the prior detectors for ambient backscatter communications, the proposed detectors have the advantages of achieving superior BER performance with lower communication delay.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2018.2819188