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arXiv 2104.09934eess.SP
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6 G超大大规模多输入多输出无线通信系统中通用的三维空时频非平稳THz信道模型

A General 3D Space-Time-Frequency Non-Stationary THz Channel Model for 6G Ultra-Massive MIMO Wireless Communication Systems

Jun Wang, Cheng-Xiang Wang, Jie Huang, Haiming Wang, Xiqi Gao

摘要:

针对第六代太赫兹(THz)无线通信系统,提出了一种新的三维空间-时间-频率(STF)非平稳几何随机模型(GBSM)。所提出的THz信道模型是非常通用的,具有在多个THz应用场景中捕获不同信道特性的能力,所述多个THz应用场景诸如室内场景、设备到设备(D2 D)通信、超大规模多输入多输出(MIMO)通信以及用户的长行进路径。此外,所提出的信道模型的通用性证明了它可以很容易地减少到不同的简化信道模型,以适应特定的情况下,通过适当地调整模型参数的事实。所提出的通用信道模型分别考虑了由超大规模多输入多输出、长传播路径和大带宽THz通信引起的空间、时间和频率域的非平稳性。统计特性的建议一般太赫兹信道模型进行了研究。通过将相对角度扩展和均方根时延扩展的仿真结果与相应的信道测量值进行比较,验证了所提出的信道模型的准确性和通用性。

英文摘要:

In this paper, a novel three-dimensional (3D) space-time-frequency (STF) non-stationary geometry-based stochastic model (GBSM) is proposed for the sixth generation (6G) terahertz (THz) wireless communication systems. The proposed THz channel model is very general having the capability to capture different channel characteristics in multiple THz application scenarios such as indoor scenarios, device-to-device (D2D) communications, ultra-massive multiple-input multiple-output (MIMO) communications, and long traveling paths of users. Also, the generality of the proposed channel model is demonstrated by the fact that it can easily be reduced to different simplified channel models to fit specific scenarios by properly adjusting model parameters. The proposed general channel model takes into consideration the non-stationarities in space, time, and frequency domains caused by ultra-massive MIMO, long traveling paths, and large bandwidths of THz communications, respectively. Statistical properties of the proposed general THz channel model are investigated. The accuracy and generality of the proposed channel model are verified by comparing the simulation results of the relative angle spread and root mean square (RMS) delay spread with corresponding channel measurements.

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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