Open Access

ARTICLE

Anti-Jamming Null Space Projection Beamforming Based on Symbiotic Radio

Baofeng Ji^1,2,3,4,*, Yifan Liu^1,2,3,4, Tingpeng Li¹, Ling Xing², Weixing Wang², Shahid Mumtaz⁵, Xiaolong Shang⁶, Wanying Liu², Congzheng Han⁴

1 State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System (CEMEE), Luoyang, 471000, China
2 Research and Innovation Center of Intelligent System, Longmen Laboratory, Luoyang, 471000, China
3 College of Information Engineering, Henan University of Science and Technology, Luoyang, 471000, China
4 Institute of Atmospheric Physics, Chinese Academy of Sciences (LAGEO), Beijing, 100000, China
5 Instituto de Telecomunicaes, Aveiro, 3800-005, Portugal
6 Chinese Academy of Agricultural Mechanization Sciences, Beijing, 100000, China

* Corresponding Author: Baofeng Ji. Email:

(This article belongs to the Special Issue: Recent Advances in Backscatter and Intelligent Reflecting Surface Communications for 6G-enabled Internet of Things Networks)

Computer Modeling in Engineering & Sciences 2024, 138(1), 679-689. https://doi.org/10.32604/cmes.2023.028667

Received 31 December 2022; Accepted 23 April 2023; Issue published 22 September 2023

Abstract

With the development of information technology, more and more devices are connected to the Internet through wireless communication to complete data interconnection. Due to the broadcast characteristics of wireless channels, wireless networks have suffered more and more malicious attacks. Physical layer security has received extensive attention from industry and academia. MIMO is considered to be one of the most important technologies related to physical layer security. Through beamforming technology, messages can be transmitted to legitimate users in an offset direction that is as orthogonal as possible to the interference channel to ensure the reception SINR by legitimate users. Combining the symbiotic radio (SR) technology, this paper considers a symbiotic radio anti-jamming MIMO system equipped with a multi-antenna system at the main base station. In order to avoid the interference signal and improve the SINR of the signal received by the user. The base station is equipped with a uniform rectangular antenna array, and using Null Space Projection (NSP) Beamforming, Intelligent Reflecting Surface (IRS) can assist in changing the beam’s angle. The simulation results show that NSP Beamforming could make a better use of the null space of interference, which can effectively improve the received SINR of users under directional interference, and improve the utilization efficiency of signal energy.

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Keywords

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