NOMA-Based UAV Communications for Maritime Coverage Enhancement

• 作 者: Rui Tang Wei Feng Yunfei Chen Ning Ge
• 机 构: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;School of Engineeri
• 出 处: 中国通信（英文版）
• 发表日期: 2021年4期
• 关键词: large-scale channel state information (CSI) maritime communications non-orthogon

The lack of communication infrastructure in the ocean inevitably leads to coverage blind zones. In addition to high-throughput marine satellites, un-manned aerial vehicles (UAVs) can be used to provide coverage for these blind zones along with onshore base stations. In this paper, we consider the use of UAV for maritime coverage enhancement. Particularly, to serve more ships on the vast oceanic area with limited spec-trum resources, we employ non-orthogonal multiple access (NOMA). A joint power and transmission du-ration allocation problem is formulated to maximize the minimum ship throughput, with the constraints on onboard communication energy. Different from pre-vious works, we only assume the slowly time-varying large-scale channel state information (CSI) to reduce the system cost, as the large-scale CSI is location-dependent and can be obtained according to a priori radio map. To solve the non-convex problem, we de-compose it into two subproblems and solve them in an iterative way. Simulation results show the effective-ness of the proposed solution.