Thresholded cover-free coding with spatial features for anti-denial of URLLC radio access

In this work, we propose a novel method for pilot coding on multidimensional resources to enhance the resilience of pilot signals in 5G and Beyond. Particularly, it is here suggested to take place in two main steps. (1) Develop a thresholded cover-free code based pilot encoding/decoding mechanism on random domain to disperse the effect of attack; (2) Enhance the pilot decoding process by using group spatial channel features. We can derive asymptotic expressions for short-packet decoding performance under spatially correlated channel model. Based on the result, we can derive novel analytical closed-form expressions of failure probability of this URLLC system to describe its reliability. Simulations show that our method can bring ultrahigh reliability and low latency despite attacks on pilots.