Spectrum Allocation Method for Covert Transmission of Reconnaissance Information in Multi-UAVs Networks

To improve the spectrum efficiency in the covert transmission of reconnaissance information of multiple unmanned aerial vehicles (UAVs) networks, a spectrum allocation method considering covert transmission of reconnaissance information of multi-UAVs is proposed. The satisfaction of information transmission of multi-UAVs networks is determined as a measure of spectrum allocation and block length allocation. The joint optimization of spectrum allocation and block length allocation is a complex NP-problem and non-convex problem, which be decomposed into two sub-problems by the block coordination descent, such as spectrum allocation and block length allocation. The particle swarm optimization algorithm is used to solve the above two sub-problems. Simulation results show that the proposed algorithm can effectively improve the satisfaction of information transmission of multi-UAVs networks, while the information can be covertly transmitted from UAVs to the ground control station.