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Time-coding spread-spectrum reconfigurable intelligent surface for secure wireless communication: theory and
Optics Express
|October 7, 2021
Summary
We developed a novel spread-spectrum secure wireless communication system using a time-coding reconfigurable intelligent surface (RIS). This system enhances security by preventing interception and suppressing interference, offering a low-cost encryption solution.
Area of Science:
- Wireless Communication
- Metamaterials
- Information Security
Background:
- Reconfigurable Intelligent Surfaces (RIS) offer tunable electromagnetic properties.
- Secure wireless communication systems require robust encryption and interference mitigation.
Purpose of the Study:
- To introduce a time-coding RIS for spread-spectrum secure wireless communication.
- To demonstrate a low-cost, easy-implementation encryption architecture for enhanced security.
Main Methods:
- Utilizing a time-coding RIS by switching between Perfect Electrical Conductor (PEC) and Perfect Magnetic Conductor (PMC) states.
- Implementing a pseudo-random time sequence for spectrum spreading.
- Conducting theoretical analysis and experimental validation with an 8x8 RIS.
Main Results:
- The time-coding RIS effectively spreads the spectrum.
- Demonstrated interception prevention capabilities.
- Showcased interference suppression features.
Conclusions:
- The time-coding RIS is a viable technology for secure wireless communication.
- This approach provides a cost-effective and simple encryption method.
- The system effectively enhances both security and signal quality.
