Ultra-Massive MIMO Channel Modeling for Graphene-Enabled Terahertz-Band Communications
Ultra-Massive MIMO Channel Modeling for Graphene-Enabled Terahertz-Band Communications
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DOI：
10.1109/vtcspring.2018.8417893
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
Chong Han;J. Jornet;I. Akyildiz
中科院分区：
文献类型：
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作者：
Chong Han;J. Jornet;I. Akyildiz
太赫兹（THz）频带通信（0.1-10 THz）被设想为关键的无线技术，以满足对超5G系统中更快数据速率的日益增长的需求，这要归功于其超宽带宽。THz频率下的极高路径损耗和THz收发器的有限传输功率对THz无线通信施加了主要的距离限制。为了增加通信距离和在太赫兹频带频率处可实现的数据速率，已经引入了超大规模MIMO（UM-MIMO）的概念，其集成了非常大量的纳米天线（例如，1024）以非常小的覆盖区（例如，1 mm^2）。在本文中，UM-MIMO通信在太赫兹波段的端到端的模型，通过占石墨烯基等离子体纳米天线阵列的性质和三维太赫兹传播的特点。该模型被用来研究UM- MIMO信道的性能。特别是，路径增益，阵列因子和宽带容量的空间复用和波束形成制度进行了分析。结果表明，在0.3THz和1 THz下，利用1024 × 1024 UM-MIMO系统，在20 m的距离内实现每秒多兆比特的链路传输是可行的。
Terahertz (THz)-band communication (0.1-10 THz) is envisioned as a key wireless technology to satisfy the in- creasing demand for faster data-rates in beyond 5G systems, thanks to its ultra-broad bandwidth. The very high path loss at THz frequencies and the limited transmission power of THz transceivers impose a major distance limitation for THz wireless communications. To increase the communication distance and the achievable data rates at THz-band frequencies, the concept of Ultra-Massive MIMO (UM-MIMO) has been introduced, which integrates a very large number of nano-antennas (e.g., 1024) in very small footprints (e.g., 1 mm^2). In this paper, an end-to-end model for UM-MIMO communication in the THz band is developed, by accounting for the properties of graphene- based plasmonic nano-antenna arrays and the peculiarities of three- dimensional THz propagation. The developed model is utilized to investigate the performance of the UM- MIMO channel. In particular, the path gain, the array factor and the the wideband capacity for both spatial multiplexing and beamforming regimes are analyzed. The results show that multi-Terabit-per-second links are feasible at distances of up to 20 m when utilizing 1024 × 1024 UM-MIMO systems at 0.3 THz and 1 THz.