论文标题
关于基于RSMA的无人机通信的下行链路性能
On the Downlink Performance of RSMA-based UAV Communications
论文作者
论文摘要
将无人驾驶汽车（UAV）用作基站（BSS）是第五代（5G）和超过5G网络的关键推动力。具体而言，航空基站（UAV-BS）有望提供无处不在的连通性和高光谱效率。为此，我们在此通信中介绍了对速率分类多个访问（RSMA）与UAV-BSS和下行链路传输的集成的深入探讨。旨在最大化用户加权总和数据速率的非凸面问题，RSMA预编码和速率分解的问题。由于其复杂性，研究了两个子问题，即UAV放置和RSMA参数优化。然后将所得的溶液组合在一起，以提出一种新颖的交替优化方法。模拟结果说明了与基线方法相比，后者的效率。
The use of unmanned aerial vehicles (UAVs) as base stations (BSs) is envisaged as a key enabler for the fifth generation (5G) and beyond-5G networks. Specifically, aerial base stations (UAV-BS) are expected to provide ubiquitous connectivity and high spectral efficiency. To this end, we present in this correspondence an in-depth look into the integration of rate-splitting multiple access (RSMA) with UAV-BSs and downlink transmissions. A non-convex problem of joint UAV placement, RSMA precoding, and rate splitting, aiming to maximize the weighted sum data rate of users is formulated. Due to its complexity, two sub-problems are investigated, namely the UAV placement and RSMA parameters optimization. The resulting solutions are then combined to propose a novel alternating optimization method. Simulation results illustrate the latter's efficiency compared to baseline approaches.
