Anti-jamming and anti-eavesdropping in A2G communication system with jittering UAV

This paper focuses on anti-jamming and anti-eavesdropping problem in air-to-ground (A2G) communication networks considering the impact of body jitter of unmanned aerial vehicle (UAV). A full-duplex (FD) active ground eavesdropper launches jamming attack while eavesdropping to stimulate the legitimate transmitter (i.e., UAV) to increase its transmission power. The legitimate transmitter's objective is to against the simultaneous wiretapping and jamming with a robust and power-efficient transmission scheme. The active eavesdropper aims to minimize the system secrecy rate. To study the interaction between the legitimate transmitter and the active eavesdropper, a non-cooperative game framework is formulated. Detailed, considering the impact of UAV jitter on antenna array response and secrecy performance, we first investigate the UAV's transmission power minimization problem for the worst scenario with minimum legitimate data rate and maximum eavesdropping data rate under UAV jitter. Then, the active eavesdropper's secrecy rate minimization problem with the worst scenario is investigated by optimizing its jamming strategy. Nash equilibrium is proved to be existed and obtained with the proposed iterative algorithm. Finally, extensive numerical results are provided to evaluate the system secrecy performance and to show the secrecy performance gains of the proposed method.