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arXiv 2008.08212eess.SPcs.SYeess.SY
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多无人机通信的联合信道分配和功率分配

Joint Channel Assignment and Power Allocation for Multi-UAV Communication

Lingyun Zhou, Xihan Chen, Mingyi Hong, Shi Jin, Qingjiang Shi

摘要:

无人机群通过利用更有利的视距传播,为未来无线网络实现更好的覆盖和更高的容量提供了一种新的模式。为了获得无人机群的潜在收益,地面控制单元(GCU)发送的遥控信号是必不可少的,而控制信号的质量在实践中由于相邻信道干扰(ACI)和来自分布在该区域的辐射源的外部干扰(EI)的影响而敏感。为了应对这些挑战,本文考虑了多无人机通信系统中的优先级感知资源协调,其中多个无人机由GCU控制以执行具有预定义轨迹的某些任务。具体而言,我们最大化的最小信号干扰噪声比(SINR)之间的所有无人机通过联合优化信道分配和功率分配策略下严格的资源可用性约束。根据ACI的强度,我们考虑了两种情况下的相应问题,即,空ACI和ACI系统。利用Null-ACI情形下的特殊问题结构,我们首先将其转化为等价的更易处理的形式,并通过匈牙利算法获得全局最优解。对于一般的ACI系统,我们发展了一个有效的迭代算法,其解决方案的基础上光滑逼近和交替优化方法。大量的仿真结果表明,所提出的算法可以显着提高所有无人机之间的最小信干噪比,并适应不同的任务优先级的通信资源分配。

英文摘要:

Unmanned aerial vehicle (UAV) swarm has emerged as a promising novel paradigm to achieve better coverage and higher capacity for future wireless network by exploiting the more favorable line-of-sight (LoS) propagation. To reap the potential gains of UAV swarm, the remote control signal sent by ground control unit (GCU) is essential, whereas the control signal quality are susceptible in practice due to the effect of the adjacent channel interference (ACI) and the external interference (EI) from radiation sources distributed across the region. To tackle these challenges, this paper considers priority-aware resource coordination in a multi-UAV communication system, where multiple UAVs are controlled by a GCU to perform certain tasks with a pre-defined trajectory. Specifically, we maximize the minimum signal-to-interference-plus-noise ratio (SINR) among all the UAVs by jointly optimizing channel assignment and power allocation strategy under stringent resource availability constraints. According to the intensity of ACI, we consider the corresponding problem in two scenarios, i.e., Null-ACI and ACI systems. By virtue of the particular problem structure in Null-ACI case, we first recast the formulation into an equivalent yet more tractable form and obtain the global optimal solution via Hungarian algorithm. For general ACI systems, we develop an efficient iterative algorithm for its solution based on the smooth approximation and alternating optimization methods. Extensive simulation results demonstrate that the proposed algorithms can significantly enhance the minimum SINR among all the UAVs and adapt the allocation of communication resources to diverse mission priority.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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