{"title":"Downlink Performance Analysis of Extremely Large-Scale MIMO-OFDM Systems for High-Speed Railway","authors":"Wenhui Yi;Jiayi Zhang;Zhe Wang;Huahua Xiao;Bo Ai","doi":"10.1109/TVT.2025.3547384","DOIUrl":null,"url":null,"abstract":"Thepotential of extremely large-scale multiple-input multiple-output (XL-MIMO) systems to enhance the performance of high-speed railway (HSR) wireless networks is vast. In this correspondence, we examine the performance characteristics of the XL-MIMO-OFDM HSR system, focusing on uniform planar array (UPA) and uniform linear array (ULA) configurations. Considering the multipath spherical wave channel model, we develop a system model that accounts for the Doppler frequency offset (DFO) caused by train movement. Our analysis includes the performance of effective degrees of freedom (EDoF), deriving closed-form expressions for both UPA- and ULA-based systems. Additionally, we investigate the integration of XL-MIMO with orthogonal frequency-division multiplexing (OFDM), which enhances the signal-to-interference plus noise ratio (SINR) and spectral efficiency (SE) of individual base stations. Simulation results demonstrate the superior EDoF performance of UPA- and ULA-based XL-MIMO-OFDM systems. Moreover, the intercarrier interference resulting from train movement increases with speed, and the degradation in signal quality caused by this interference can be mitigated by configuring the XL-MIMO-OFDM system. Notably, the adoption of XL-MIMO technology with a near-field channel model significantly improves coverage reliability compared to traditional MIMO configurations using a far-field channel model.","PeriodicalId":13421,"journal":{"name":"IEEE Transactions on Vehicular Technology","volume":"74 7","pages":"11609-11614"},"PeriodicalIF":7.1000,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Vehicular Technology","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10915611/","RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Thepotential of extremely large-scale multiple-input multiple-output (XL-MIMO) systems to enhance the performance of high-speed railway (HSR) wireless networks is vast. In this correspondence, we examine the performance characteristics of the XL-MIMO-OFDM HSR system, focusing on uniform planar array (UPA) and uniform linear array (ULA) configurations. Considering the multipath spherical wave channel model, we develop a system model that accounts for the Doppler frequency offset (DFO) caused by train movement. Our analysis includes the performance of effective degrees of freedom (EDoF), deriving closed-form expressions for both UPA- and ULA-based systems. Additionally, we investigate the integration of XL-MIMO with orthogonal frequency-division multiplexing (OFDM), which enhances the signal-to-interference plus noise ratio (SINR) and spectral efficiency (SE) of individual base stations. Simulation results demonstrate the superior EDoF performance of UPA- and ULA-based XL-MIMO-OFDM systems. Moreover, the intercarrier interference resulting from train movement increases with speed, and the degradation in signal quality caused by this interference can be mitigated by configuring the XL-MIMO-OFDM system. Notably, the adoption of XL-MIMO technology with a near-field channel model significantly improves coverage reliability compared to traditional MIMO configurations using a far-field channel model.
期刊介绍：
The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.
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