Millimeter-Wave Enhanced Local Area Systems: A High-Data-Rate Approach for Future Wireless Networks
Millimeter-Wave Enhanced Local Area Systems: A High-Data-Rate Approach for Future Wireless Networks
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DOI：
10.1109/jsac.2014.2328111
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发表时间：
2014-06-01
影响因子：
16.4
通讯作者：
Nie, Shuai
中科院分区：
文献类型：
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作者：
Ghosh, Amitava;Thomas, Timothy A.;Nie, Shuai
无线数据流量预计将在未来20年内飙升10000倍。为了解决无线数据流量的这种令人难以置信的增长，第一种方法是通过使用更先进的频谱效率技术来进一步提高频谱效率系统，例如6GHz以下频段的4G LTE。然而，所需的系统复杂性的显著增加沿着对硬件实现和信道条件的基本限制可能限制该方法的可行性。此外，最终的结果将是一个频谱效率极高的系统，未来的改进空间很小，以满足不断增长的无线数据使用。第二种方法是在频率上移动，进入未使用的非传统频谱，其中有巨大的带宽可用，例如毫米波（mmWave）。毫米波选项使得能够使用简单的空中接口，因为可以利用大带宽（例如，2GHz）来实现高数据速率，而不是依赖于最初旨在以较小带宽实现高频谱效率的高度复杂的技术。此外，毫米波系统将很容易发展到更高的系统容量，因为随着数据需求的进一步增加，将有足够的空间来提高频谱效率。本文通过概述毫米波增强型局域网（eLA）技术，重点介绍了5G需求、频谱考虑、传播和信道建模、空中接口和多天线设计以及网络架构解决方案，介绍了将毫米波用于超密集网络的第五代（5G）无线系统的案例。
Wireless data traffic is projected to skyrocket 10 000 fold within the next 20 years. To tackle this incredible increase in wireless data traffic, a first approach is to further improve spectrally efficient systems such as 4G LTE in bands below 6 GHz by using more advanced spectral efficiency techniques. However, the required substantial increase in system complexity along with fundamental limits on hardware implementation and channel conditions may limit the viability of this approach. Furthermore, the end result would be an extremely spectrally efficient system with little room for future improvement to meet the ever-growing wireless data usage. The second approach is to move up in frequency, into an unused nontraditional spectrum where enormous bandwidths are available, such as at millimeter wave (mmWave). The mmWave option enables the use of simple air interfaces since large bandwidths can be exploited (e.g., 2 GHz) to achieve high data rates rather than relying on highly complex techniques originally aimed at achieving a high spectral efficiency with smaller bandwidths. In addition, mmWave systems will easily evolve to even higher system capacities, because there will be plenty of margin to improve the spectral efficiency as data demands further increase. In this paper, a case is made for using mmWave for a fifth generation (5G) wireless system for ultradense networks by presenting an overview of enhanced local area (eLA) technology at mmWave with emphasis on 5G requirements, spectrum considerations, propagation and channel modeling, air-interface and multiantenna design, and network architecture solutions.