Multiple Access MmWave Design for UAV-Aided 5G Communications
Multiple Access MmWave Design for UAV-Aided 5G Communications
复制标题
用于无人机辅助5G通信的多址毫米波设计
DOI：
10.1109/mwc.2018.1800216
复制
发表时间：
2019-02
影响因子：
12.9
通讯作者：
Lu Wang;Y. Che;Jinfeng Long;Lingjie Duan;Kaishun Wu
中科院分区：
文献类型：
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作者：
Lu Wang;Y. Che;Jinfeng Long;Lingjie Duan;Kaishun Wu
无人飞行器（UAV）具有提高无线网络容量的巨大潜力，但是在超密集网络中操作具有挑战性，这主要是由于从UAV的主导视线信道接收到的强干扰。通过形成多个高度定向的波束，毫米波（mmWave）通信技术允许经由波束分多址（BDMA）的并发用户传输，并且因此已经成为减轻第五代（5G）UAV通信的干扰的有前景的解决方案。然而，由于实际毫米波通信系统中生成的波束数量有限，传统的BDMA无法满足不断增长的容量要求。迫切需要一种新的多址技术。在本文中，我们将毫米波通信与无人机辅助的5G超密集网络相结合，设计了一种新的链路自适应星座分多址（CoDMA）技术。我们讨论了有效的多址技术设计的关键挑战，然后研究新的复用方法和波束宽度优化的干扰管理在无人机辅助动态网络的设计原则。进一步将灵活的星座划分应用于无比率编码中，提出了具有波束宽度自适应的CoMDA系统级设计，以释放复用增益。最后，我们证明了我们的设计可以成功地在单个波束内实现多用户接入，而不会引起任何波束内干扰，同时有效地减轻来自相邻波束的干扰。我们还证明了所提出的设计是自适应的无人机网络动态，并可以大大提高系统的吞吐量。
Unmanned aerial vehicles (UAVs) have tremendous potential to improve wireless network capacity, but are challenging to operate in ultra-dense networks, mainly due to the strong interference received from the dominated lineof- sight channels of the UAVs. By forming multiple highly directional beams, millimeter-wave (mmWave) communication technology allows concurrent user transmissions via beam-division multiple access (BDMA), and thus has emerged as a promising solution to mitigate interference for the fifth generation (5G) UAV communication. However, due to the limited number of beams generated in practical mmWave communication systems, conventional BDMA cannot meet the ever increasing capacity requirement. A new multiple access technique is intensely desired. In this article, we integrate mmWave communication with UAV-aided 5G ultra-dense networks, and design a novel link-adaptive constellation- division multiple access (CoDMA) technique. We discuss key challenges in efficient multiple access technique design, and then investigate design principles on new multiplexing methods and beamwidth optimization for interference management in UAV-aided dynamic networks. We further apply flexible constellation division in rateless codes, and put forward the system-level design of CoMDA with beamwidth adaptation to unleash the multiplexing gain. Finally, we show that our design can successfully enable multiple-user access within a single beam without causing any intra-beam interference while efficiently mitigating interference from adjacent beams. We also demonstrate that the proposed design is adaptive to the UAV network dynamics, and can greatly improve the system throughput.