论文标题
空中半质量NOMA系统的中断分析
Outage Analysis of Aerial Semi-Grant-Free NOMA Systems
论文作者
论文摘要
在本文中，我们分析了无人驾驶汽车（UAV）的停电性能，其启用的下行链路非正交多访问（NOMA）通信系统具有半偏见的（SGF）传输方案。无人机为基于赠款（GB）的用户提供覆盖范围服务，并允许一位用户机会地利用相同的渠道资源。混合连续的干扰取消方案首次在下行链路NOMA场景中实施。得出了无赠款（GF）用户的确切和渐近中断概率（OP）的分析表达式。结果表明，只有在用户服务质量要求的严格条件下，才能实现无零多样性顺序。随后，我们提出了一个有效的动态功率分配（DPA）方案，以放宽此类数据速率约束以解决此问题。使用DPA方案的GF用户的确切和渐近OP的分析表达式得出。最后，提出了蒙特卡洛模拟结果，以验证衍生分析表达式的正确性，并证明无人机的位置和高度对GF用户的OP的影响。
In this paper, we analyze the outage performance of unmanned aerial vehicles (UAVs)-enabled downlink non-orthogonal multiple access (NOMA) communication systems with the semi-grant-free (SGF) transmission scheme. A UAV provides coverage services for a grant-based (GB) user and one user is allowed to utilize the same channel resource opportunistically. The hybrid successive interference cancellation scheme is implemented in the downlink NOMA scenarios for the first time. The analytical expressions for the exact and asymptotic outage probability (OP) of the grant-free (GF) user are derived. The results demonstrate that no-zero diversity order can be achieved only under stringent conditions on users' quality of service requirements. Subsequently, we propose an efficient dynamic power allocation (DPA) scheme to relax such data rate constraints to address this issue. The analytical expressions for the exact and asymptotic OP of the GF user with the DPA scheme are derived. Finally, Monte Carlo simulation results are presented to validate the correctness of the derived analytical expressions and demonstrate the effects of the UAV's location and altitude on the OP of the GF user.
