Eavesdropping occurs when an unauthorized receiver secretly intercepts a transmitted signal. In this paper, we investigate the optimum flight path and transmit power for an unmanned aerial vehicle (UAV) relay to improve secrecy performance in the presence of an eavesdropper. We propose an algorithm based on particle swarm optimization (PSO) where the UAV flight path and power are jointly optimized to maximize the secrecy capacity. Simulation results show that the proposed algorithm is capable of achieving a performance that is close to the ideal secrecy performance. Simulation results also highlight the benefits of power optimization.

中文翻译：

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通过联合优化无人机中继飞行路径和发射功率来提高保密性

当未经授权的接收者秘密拦截传输的信号时，就会发生窃听。在本文中，我们研究了无人飞行器（UAV）中继的最佳飞行路径和发射功率，以改善在有窃听者的情况下的保密性能。我们提出了一种基于粒子群优化（PSO）的算法，其中联合优化了无人机的飞行路径和功率，以最大化保密能力。仿真结果表明，所提算法能够达到接近理想保密性能的性能。仿真结果还凸显了功耗优化的优势。