Multi-Antenna Covert Communication via Full-Duplex Jamming Against a Warden With Uncertain Locations

Covert communication can hide the information transmission process from warden to prevent adversarial eavesdropping. However, it becomes challenging when location of is uncertain. In this paper, we propose a covert scheme against with uncertain locations, which maximizes connectivity throughput between multi-antenna transmitter and full-duplex jamming receiver limit outage probability (the found by warden). First, analyze monotonicity obtain optimal for warden. Then, under worst situation, optimize rate, transmit power maximize connection throughput. This problem solved in two stages. derive transmit-to-jamming ratio maximum allowed probability. With constraint, maximized over fixed rate. Since rate are coupled, bisection method applied via optimizing iteratively. Simulation results presented evaluate effectiveness proposed scheme.