Interference Suppression for Railway Wireless Communication Systems: A Reconfigurable Intelligent Surface Approach
Interference Suppression for Railway Wireless Communication Systems: A Reconfigurable Intelligent Surface Approach
复制标题
铁路无线通信系统的干扰抑制：可重构智能地面方法
DOI：
10.1109/tvt.2021.3111646
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发表时间：
2021-11-01
影响因子：
6.8
通讯作者：
Zhang, Zhengquan
中科院分区：
文献类型：
--
作者：
Ma, Zheng;Wu, Yanliang;Zhang, Zhengquan
由于列车控制和调度指令的传输，对铁路无线通信系统提出了超高的可靠性要求。然而，在铁路运输中，RWCS的服务质量受到外界干扰和干扰的严重影响。有意或无意源产生的外部干扰和干扰会干扰RWCS的传输，对列车的安全构成极大的威胁。本文提出了一种可重构智能曲面（RIS）方法来抑制RWCS中的干扰和干扰。以信噪比（SINR）为QoS指标，将RIS的干扰抑制问题转化为接收信噪比最大化问题。给出了基于Charnes-Cooper变换和基于单线性规划的两种最优解。为了在RWCS中实际部署RIS，还讨论了两种低复杂度的次优方案，即绕过干扰链路的信道估计和最大化接收期望功率。仿真结果表明，RIS可以应用于RWCS中，具有较好的抗干扰增益。
Due to transmission of train control and dispatch commands, the ultra high reliability is required for railway wireless communication systems (RWCS). However, the quality of service (QoS) of RWCS is affected by external interference and jamming seriously in railway transportation. The external interference and jamming generated from intentional and/or unintentional sources can disturb the transmission of RWCS and be extremely dangerous for the trains' safety. In this paper, a reconfigurable intelligent surface (RIS) approach is proposed to suppress the interference and jamming in RWCS. By taking the signal-to-interference-plus-noise (SINR) as the QoS metrics, the interference suppression problem with RIS is transformed into a maximizing receiving SINR problem. Two optimum solutions, which one is based on Charnes-Cooper transformation and the other is based on single linear programming, are provided. In order to deploy the RIS in RWCS practically, two low-complexity sub-optimum solutions, which one is to bypass the channel estimation for interference links and the other is to maximize the receiving desired power, are also discussed. The simulations results show that the RIS can be employed in RWCS with considerable anti-interference gain.