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arXiv 2203.14293eess.SP
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未来小蜂窝网络中基于无人机的mmWave前传上行链路三维信道建模

3D Uplink Channel Modeling of UAV-based mmWave Fronthaul Links for Future Small Cell Networks

Mohammad Taghi Dabiri, Mazen Omar Hasna

摘要:

在这项研究中,我们考虑一个无人机(UAV)辅助的异构网络,提供了一个具有成本效益和易于部署的解决方案,以解决有关的问题,将分布式小细胞的流量转移到核心网络。对于任意给定的小小区基站(SBS)分布,我们首先通过考虑诸如无人机的振动、SBS的分布、无人机在天空中的位置等真实参数来表征SBS到网络化飞行平台(NFP)的精确毫米波(mmWave)信道模型,由3GPP提供的真实三维(3D)天线方向图模型以及由天线旁瓣和频率重用引起的干扰。然后,对于所表征的信道,我们推导出端到端信号噪声干扰比(SINR)的解析封闭形式的表达式。在此基础上,我们推导出所考虑的基于无人机的毫米波上行链路的中断概率和信道容量的封闭形式的表达式。蒙特卡洛模拟验证了推导的解析表达式的准确性。最后,我们研究了不同的信道参数,如天线方向图增益,无人机的振动强度,无人机在天空中的位置,SBS的分布,和频率复用的性能所考虑的基于无人机的上行链路信道的平均容量和中断概率的影响。

英文摘要:

In this study, we consider an unmanned aerial vehicle (UAV)-assisted heterogeneous network that is offered as a cost-effective and easy to deploy solution to solve the problem related to transferring traffic of distributed small cells to the core network. For any given distribution of small cell base stations (SBSs), we first characterize an accurate millimeter wave (mmWave) channel model for SBS to networked flying platform (NFP) by taking into consideration real parameters such as UAV's vibrations, distribution of SBSs, position of UAVs in the sky, real three-dimensional (3D) antenna pattern model provided by 3GPP along with interference caused by antenna side lobes and frequency reuse. Then, for the characterized channel, we derive an analytical closed-form expression for the end-to-end signal-to-noise plus interference ratio (SINR). Based on that, we derive the closed-form expressions for the outage probability and channel capacity of the considered UAV-based mmWave uplinks. The accuracy of the derived analytical expressions is verified by Monte Carlo simulations. Finally, we investigate the effects of different channel parameters such as antenna pattern gain, strength of UAV's vibrations, UAVs' positions in the sky, distribution of SBSs, and frequency reuse on the performance of the considered UAV-based uplink channel in terms of average capacity and outage probability.

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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