arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1907.05085eess.SPcs.ITmath.IT
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走向互联天空:地面和UAV用户共存的下倾斜天线波束形成性能

Towards a Connected Sky: Performance of Beamforming with Down-tilted Antennas for Ground and UAV User Co-existence

Ramy Amer, Walid Saad, Nicola Marchetti

摘要:

为空中用户(例如蜂窝连接的无人机)提供连接是未来蜂窝系统的关键挑战。在本文中,使用共轭波束形成的同时内容交付与多个地面用户共存的AU进行了研究。特别地,考虑通过空间复用服务空中和地面用户的均匀分布的大规模多输入多输出使能的地面基站的内容递送网络。对于该模型,成功的内容递送概率被导出为系统参数的函数。各种系统参数,如天线下倾角,AU海拔高度,调度用户的数量,和天线的数量上可实现的性能的影响进行了研究。结果表明,每当AU的高度低于BS的高度,天线下倾角产生的AU和GU的性能之间的内在权衡。然而,如果AU高度超过BS高度,则以相当大的角度向下倾斜BS天线改善AU和GU两者的性能。

英文摘要:

Providing connectivity to aerial users such as cellular connected unmanned aerial vehicles is a key challenge for future cellular systems. In this paper, the use of conjugate beamforming for simultaneous content delivery to an AU coexisting with multiple ground users is investigated. In particular, a content delivery network of uniformly distributed massive MIMO enabled ground base stations serving both aerial and ground users through spatial multiplexing is considered. For this model, the successful content delivery probability is derived as a function of the system parameters. The effects of various system parameters such as antenna down-tilt angle, AU altitude, number of scheduled users, and number of antennas on the achievable performance are then investigated. Results reveal that whenever the AU altitude is below the BS height, the antennas down-tilt angles yield an inherent tradeoff between the performance of the AU and the GUs. However, if the AU altitude exceeds the BS height, down-tilting the BS antennas with a considerably large angle improves the performance of both the AU and the GUs.

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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