The wireless signal that intentionally disrupts the communication is described as the jamming signal. Clustered jamming is the use of jamming signals of the devices that are clustered in groups, whereas non-clustered jamming refers to the use of the jamming signals of the spatially distributed devices that are un-clustered. The efficiency of the unmanned aerial vehicle (UAV)-assisted cellular networks compromises in the presence of clustered as well as non-clustered jammers. Furthermore, the UAV's antenna 3D beam-width vibrates due to strong atmospheric wind, atmospheric pressure, or mechanical noise influencing UAV-assisted networks' efficiency. Thus, the efficiency characterization of UAV-assisted networks considering jamming and beam-width variations is essential. This paper concentrates on the efficiency of the user equipment's connection with the line-of-sight (LOS) UAV, non-LOS UAV, and cellular base station in terms of association, coverage, and spectrum in the presence of clustered as well as non-clustered jammers and beam-width variations. For a network consisting of jammers and beam-width variations, the analytical expressions are derived to assess the user's association and coverage efficiency. The results show that the network's efficiency decreases drastically with the increasing beam-width variations. Moreover, the non-clustered jamming reduces the efficiency of the networks much more when compared with the clustered jamming. Therefore, to enhance the efficiency of the system; network designers need to consider implementing advanced anti-jamming techniques for a system employing non-clustered jamming and UAV antenna beam-width variations.

中文翻译：

---

干扰场景下无人机辅助蜂窝网络的效率


故意破坏通信的无线信号被称为干扰信号。集群干扰是使用聚集成组的设备的干扰信号，而非集群干扰是指使用空间分布的非集群设备的干扰信号。在存在集群和非集群干扰机的情况下，无人机 (UAV) 辅助的蜂窝网络的效率会受到影响。此外，由于强烈的大气风、大气压力或机械噪声影响无人机辅助网络的效率，无人机的天线3D波束宽度会发生振动。因此，考虑干扰和波束宽度变化的无人机辅助网络的效率表征至关重要。本文重点关注在集群和非集群存在的情况下，用户设备与视距 (LOS) 无人机、非视距无人机和蜂窝基站的连接效率，包括关联、覆盖范围和频谱。 - 集群干扰器和波束宽度变化。对于由干扰器和波束宽度变化组成的网络，导出解析表达式来评估用户的关联和覆盖效率。结果表明，随着波束宽度变化的增加，网络的效率急剧下降。此外，与集群干扰相比，非集群干扰会更大程度地降低网络效率。因此，要提升系统的效率；网络设计人员需要考虑为采用非集群干扰和无人机天线波束宽度变化的系统实施先进的抗干扰技术。