260059 EP丨Reproduction Code for "Secure and Covert MIMO Short-Packet Communications with Location-Uncertain Malicious Nodes"

Abstract

This paper investigates the secure covert communication of multiple input multiple output (MIMO) short packets under quasi-static Rayleigh fading for malicious nodes with uncertain locations. Based on random geometry, the monitoring node Willie and eavesdropping node Eve are modeled as Poisson point processes; Alice uses Singular Value Decomposition (SVD) precoding, while Bob uses Maximum Ratio Combining (MRC) reception.

Under the condition of finite block length, the theoretical lower bound of the average minimum detection error probability is derived based on the Chernoff bound, and an approximate analytical expression for the average secrecy rate is derived. Further propose the Average Effective Security Concealment Rate (AESCR) to unify the characterization of system concealment, confidentiality, and reliability. Construct an AESCR maximization problem under average concealment constraints and propose a joint optimization method for packet length and power.

Simulation shows that AESCR increases with the increase of the number of legitimate transmitting and receiving antennas, but decreases with the increase of malicious node density and the number of malicious node antennas, and the system has an optimal packet length.