A Survey on Jamming Techniques in Physical Layer Security and Anti-Jamming Strategies for 6G

In this paper, we present a comprehensive survey on jamming techniques for physical layer security (PLS) and anti-jamming strategies in beyond fifth generation (B5G) and towards the sixth generation (6G) communication systems. A combined study on jamming and anti-jamming methods is important for PLS, and is helpful to study and design PLS algorithms in the presence of jamming, eavesdropping and spoofing. First, we present various approaches for PLS in 6G. Next, we discuss techniques that use jammers for PLS, followed by a detailed study on recently proposed anti-jamming solutions. Further, we discuss the use of machine learning and artificial intelligence for anti-jamming. Moreover, we present a study on the challenges for PLS in 6G, and discuss some future research directions.