Geometry-Based Multi-Link Channel Modeling for High-Speed Train Communication Networks

Geometry-Based Multi-Link Channel Modeling for High-Speed Train Communication Networks
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高速列车通信网络基于几何的多链路信道建模

DOI:
10.1109/tits.2019.2905036
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发表时间:
2020-03
影响因子:
8.5
通讯作者:
Liu Liu
Liu Liu
中科院分区:
工程技术1区
文献类型:
--
作者:
Zhou Tao;Tao Cheng;Salous Sana;Liu Liu

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分布式通信系统的性能通常受到多链路信道的互相关特性的影响。基于经典的几何随机模型(GBSM),研究了分布式基站高速列车通信网络中多链路小尺度衰落(SSF)信道的建模问题。为了恰当描述HST通信网络中的多链路传播场景,提出了一种新的考虑视距分量的几何模型、单跳单环模型和双跳椭圆环模型.基于所提出的GBSM,多链路信道冲激响应(CIR)的表达式,多链路互相关函数的推导和用于数值分析。此外,现实的信道测量进行在现有的HST长期演进(LTE)网络和多链路信道干扰比获得使用基于时间延迟窗口的分割方案。最后,利用多链路信道数据提取SSF互相关系数,验证了该模型的有效性。
The performance of distributed communication systems is commonly subject to the cross-correlation characteristics of multi-link channels. In this paper, we concentrate on the modeling of multi-link small-scale fading (SSF) channels in high-speed train (HST) communication networks with distributed base stations according to the classical geometry-based stochastic model (GBSM). To appropriately describe a multi-link propagation scenario in the HST communication network, a novel geometrical model considering a line-of-sight component, a single-bounced one-ring model, and a double-bounced ellipse-ring model is proposed. Based on the proposed GBSM, the expression of multi-link channel impulse responses (CIRs) is obtained, and multi-link cross-correlation functions are derived and used for numerical analysis. In addition, realistic channel measurements are conducted in the existing HST long-term evolution (LTE) networks and multi-link CIRs are acquired using a time delay window-based partitioning scheme. Finally, the SSF cross-correlation coefficient is extracted by the multi-link channel data and is used to validate the utility of the proposed model.
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