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Metasurface-assisted massive backscatter wireless communication with commodity Wi-Fi signals
Hanting Zhao1, Ya Shuang1, Menglin Wei1
1State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, 100871, Beijing, China.
Nature Communications
|August 9, 2020
Summary
This study introduces massive backscatter communication, using programmable metasurfaces to modulate ambient waves for secure, high-speed wireless data transfer. This innovation overcomes limitations of traditional methods and backscatter systems, achieving hundreds of Kbps using Wi-Fi signals.
Area of Science:
- Wireless Communication Engineering
- Metamaterials Science
- Information Theory
Background:
- Conventional wireless systems face spectral and energy limitations.
- Existing backscatter communication offers low data rates and security concerns.
Purpose of the Study:
- To introduce massive backscatter communication leveraging programmable metasurfaces.
- To enable secure and high-speed information transfer by modulating ambient waves.
Main Methods:
- Utilized a programmable metasurface to control the propagation environment.
- Employed stray ambient waves (2.4 GHz Wi-Fi) for information encoding.
- Developed a prototype system for experimental validation.
Main Results:
- Achieved data rates on the order of hundreds of Kbps.
- Demonstrated unprecedented wave control with a large-aperture metasurface.
- Showcased secure and high-speed information transfer capabilities.
Conclusions:
- Massive backscatter communication offers a new paradigm for wireless systems.
- Metasurfaces provide significant degrees of freedom for advanced wave manipulation.
- The technique is broadly applicable to various wave phenomena.
