Optimal Jammer Placement in UAV-assisted Relay Networks

Abstract

We consider the relaying application of unmanned aerial vehicles (UAVs), in which UAVs are placed between two transceivers (TRs) to increase the throughput of the system. Instead of studying the placement of UAVs as pursued in existing literature, we focus on investigating the placement of a jammer or a major source of interference on the ground to effectively degrade the performance of the system, which is measured by the maximum achievable data rate of transmission between the TRs. We demonstrate that the optimal placement of the jammer is in general a non-convex optimization problem, for which obtaining the solution directly is intractable. Afterward, using the inherent characteristics of the signal-to-interference ratio (SIR) expressions, we propose a tractable approach to find the optimal position of the jammer. Based on the proposed approach, we investigate the optimal positioning of the jammer in both dualhop and multi-hop UAV relaying settings. Numerical simulations are provided to evaluate the performance of our proposed method.

Lifetime Maximization for UAV-assisted Data Gathering Networks in the Presence of Jamming

“…In the second step, given the location of the leader, the locations of the backhaul UAVs are optimized to maximize the lifetime of the backhaul network to deliver the data from the leader to the BS. Another interesting problem is to optimize the positions of the jammers, e.g., [18], which we leave as a future work.…”