计算机科学 ›› 2020, Vol. 47 ›› Issue (10): 269-274.doi: 10.11896/jsjkx.190800029
蒋锐1,2, 尹惠1,2, 徐友云2
JIANG Rui1,2, YIN Hui1,2, XU You-yun2
摘要: 为了提升高铁无线通信系统信息传输的稳定性和可靠性,提出了一种基于位置公平保证的毫米波波束成形方法。该方法采用交错冗余覆盖网络结构来提高信息传输的可靠性。在该结构中,基站根据其与车顶移动中继之间的距离,发射不同宽度的服务波束进行信号传输,近距离时采用宽波束为列车提供服务,远距离时采用窄波束以补偿较高的路径损耗,从而保持列车在运行过程中数据传输速率的稳定性。此外,为了计算最优的发射波束宽度和波束边界点位置,提出了一种自适应搜索算法来优化服务波束。理论分析和仿真结果表明,所提方法不仅可以有效提升高铁无线通信系统数据传输的稳定性,还可以使系统获得较低的通信中断概率。
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