5G-R高铁车站场景MIMO天线阵列结构与传输性能研究

Research on MIMO Antenna Array Structure and Transmission Performance for 5G-R in High-speed Railway Station Scenarios

面向5G-R高铁车站应用场景,在2155~2165 MHz频段采用射线跟踪仿真技术,对4种不同天线阵列排布方式的MIMO系统多层传输性能进行对比研究。通过研究采取不同收发端天线阵列排布方式时的信道相关性,计算每个接收点位所能达到的MIMO系统最大传输层数,获取各层数对应的信噪比,计算在不同调制方式、不同天线排布方式下每个接收点位的下行峰值传输速率,确定面向5G-R高铁车站场景的MIMO系统最佳传输层数。仿真验证结果表明,面向5G-R频段高铁车站应用场景,基站端采用线阵、车载端采用方阵排列,可取得最佳峰值传输速率。研究结果可为5G-R专网建设中高铁车站部署MIMO系统提供技术积累和理论依据。

Oriented to the application scenarios for 5G-R high-speed railway stations,a comparison of the MIMO system multi-stream transmission performance with four types of antenna array configurations using ray-tracing simulation technology within the 5G-R frequency band 2155~2165 MHz is conducted.By analyzing channel correlation with various transceiver antenna array configurations,the study estimates the maximum achievable MIMO system spatial streams at each reception point,assesses the signal-to-noise ratio(SNR)for each spatial stream,and calculates the downlink peak throughput at each reception point under different modulation schemes and antenna configurations,determining the optimal number of transmission spatial streams for a MIMO system in a 5G-R high-speed railway station scenario.The simulation results indicate that for applications within the 5G-R frequency band at high-speed railway stations,the best peak throughputs are obtained when a linear array is used at the base station side and a square array at the vehicular side.These findings provide valuable technical insights and a theoretical foundation for the construction and deployment of 5G-R private networks and MIMO systems in high-speed railway stations.