基于位置信息辅助的网格化波束切换方法  

Grid-Based Beam Searching Assisted by Location Information

作　　者：邵霞[1] 翟亚坤 罗文宇 许丽[1] SHAO Xia;ZHAI Yakun;LUO Wenyu;XU Li(School of Electronic Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]华北水利水电大学电子工程学院,郑州450045

出　　处：《数据采集与处理》2023年第3期717-726,共10页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(U1804148)。

摘　　要：随着通信技术的发展,越来越高的通信频段得以采纳。然而电磁波衍射能力随频率的增加而降低,新一代通信系统变得更加依赖视距传播。在复杂移动场景下频繁切换波束,增加了过多的系统开销和延迟。针对该问题,提出一种基于位置信息辅助的网格化波束切换方法,利用可视路径中存在时最佳波束对保持不变的特点,划分网格波束一一对应关系及覆盖分布结构,建立位置⁃波束映射表,基于用户位置信息和运动状态计算下一时刻切换点。仿真和分析结果表明,所提方法相比非网格切换方式系统频谱效率显著提高,且所提正六边形网格切换性能优于方格,波束切换概率降低了50%,保障了通信质量,验证了基于位置信息辅助的网格化波束切换方法的合理性。With the development of communication technology,increasingly higher communication frequency bands are adopted.However,the electromagnetic wave diffraction capability decreases with increasing frequency.New generation communication systems become more dependent on line-of-sight propagation.Frequent beam switching is required in complex mobile scenarios,which increases excessive system overhead and delay.To address this problem,a position information-assisted grid-based beam switching method is proposed.The feature that the optimal beam pair remains constant in the presence of line of sight(LOS)path is utilized.The grid beam one-to-one correspondence and coverage distribution structure are divided.A position-beam mapping table is establised.All the next switching points and switching information are predicted based on position information and motion speed.The simulation and analysis results show that the proposed method significantly improves the spectral efficiency of the system compared with the non-grid switching method,and the proposed square hexagonal grid switching performance is better than the square grid,and the beam switching probability is reduced by 50%.It guarantees the communication quality and verifies the rationality of the grid-based beam switching method assisted by the position information.

关 键 词：毫米波通信 视线传播 网格 波束切换 

分 类 号：TN929.5[电子电信—通信与信息系统]