A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response
Jinpeng Wang1, Wenyu Jiang2, Kaizhi Huang2
1School of Cyber Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
Entropy (Basel, Switzerland)
|December 23, 2023
Summary
This study introduces an angular-response reconfigurable intelligent surface (RIS) to improve anti-jamming in communication systems. The novel approach enhances legitimate signal strength while attenuating jamming signals, boosting channel capacity.
Area of Science:
- Wireless communication
- Electromagnetics
- Signal processing
Background:
- Reconfigurable intelligent surfaces (RIS) enhance wireless communication by optimizing reflection coefficients.
- Existing anti-jamming schemes often overlook the crucial link between RIS reflection and electromagnetic wave incident angles.
Purpose of the Study:
- To propose a novel anti-jamming scheme for communication systems utilizing a reconfigurable intelligent surface (RIS) with angular response.
- To optimize RIS reflection coefficients to amplify legitimate signals and attenuate jamming signals, thereby increasing channel capacity.
Main Methods:
- Formulated an optimization problem to enhance legitimate signals and suppress jamming signals.
- Addressed the non-convexity arising from the coupling between incident angles and RIS reflection coefficients.
- Employed complex Taylor expansion and multidimensional complex quadratic transform (MCQT) to convert the problem into a quadratically constrained quadratic programming (QCQP) problem.
- Utilized the alternating direction method of multipliers (ADMM) algorithm for solving the optimization problem.
Main Results:
- The proposed RIS scheme with angular response significantly improves anti-jamming performance compared to schemes without angular consideration.
- Demonstrated effective amplification of legitimate signals and attenuation of jamming signals through optimized RIS reflection coefficients.
- Validated the effectiveness of the ADMM algorithm in solving the complex optimization problem.
Conclusions:
- The integration of angular response in RIS is critical for effective anti-jamming in wireless communication systems.
- The proposed optimization strategy and solution method provide a robust framework for enhancing communication security and reliability.
- This research offers a significant advancement in RIS-assisted anti-jamming techniques, paving the way for more resilient communication networks.
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