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毫米波信道中波束成形矢量的波束宽度
Beamwidth of beamforming vectors in millimeter-wave channels
- 电信科学 2022年38卷第11期 页码：47-56
- 作者机构：
- 作者简介：
[ "楼斌剑（1998- ），男，杭州电子科技大学硕士生，主要研究方向为信号与信息处理" ]
[ "王海泉（1964- ），男，博士，杭州电子科技大学教授、博士生导师，主要研究方向为无线通信、多天线系统、信号检测、信息论等" ]
[ "黄怡（1987- ），女，杭州电子科技大学博士生，主要研究方向为无线通信、多天线系统、信号检测、信息论等" ]
[ "李紫薇（1998- ），女，杭州电子科技大学硕士生，主要研究方向为信号与信息处理" ]
[ "俞芸芸（1997- ），女，杭州电子科技大学硕士生，主要研究方向为信号与信息处理" ]
- 基金信息：
DOI：10.11959/j.issn.1000-0801.2022288
中图分类号： TN91-
网络出版日期：2022-11，
纸质出版日期：2022-11-20
- 稿件说明：
移动端阅览
楼斌剑, 王海泉, 黄怡, 等. 毫米波信道中波束成形矢量的波束宽度[J]. 电信科学, 2022,38(11):47-56.
Binjian LOU, Haiquan WANG, Yi HUANG, et al. Beamwidth of beamforming vectors in millimeter-wave channels[J]. Telecommunications science, 2022, 38(11): 47-56.
楼斌剑, 王海泉, 黄怡, 等. 毫米波信道中波束成形矢量的波束宽度[J]. 电信科学, 2022,38(11):47-56. DOI： 10.11959/j.issn.1000-0801.2022288.
Binjian LOU, Haiquan WANG, Yi HUANG, et al. Beamwidth of beamforming vectors in millimeter-wave channels[J]. Telecommunications science, 2022, 38(11): 47-56. DOI： 10.11959/j.issn.1000-0801.2022288.
摘要
波束成形矢量技术能够集中所发送的能量于某一指定区域，从而提高系统性能，是5G的核心技术之一。但正是由于能量被集中这一特点，信道的任何变化都可能会使接收方越出此特定区域，从而使系统的鲁棒性能降低。波束成形矢量的波束宽度这一概念就是衡量这对矛盾的指标之一。已有的波束宽度大多针对天线而言，并非针对波束成形矢量。针对波束成形矢量，借助格拉斯曼流形中的概念，给出并研究了波束宽度的定义，在此基础上，探讨了拓宽波束宽度的方法。研究发现，天线数越多，能量越能够集中，但波束宽度受限，从而鲁棒性越弱。
Abstract
The beamforming technology is one of the core technologies in 5G and it can concentrate the transmitted energy in a specified area
thereby improving the performance of the system.But it is because of this feature that the energy is concentrated，any changes of the channel may cause to keep the receiver outside the specified area
and therefore
the performance of robustness is reduced.The concept of the beam width of a beamforming is one of the indicators to measure this tradeoff.Existing definition of beam widths are based on antennas
not on beamforming.Interms of beamforming
the definition of beam width was given and studied with the help of the concept in Grassmannian manifolds.On this basis
the method of beam width was discussed.It is found that the beam width of beamforming is closely related to the number of the transmitting antennas.The more the number of antennas
the more concentrated the energy
and the weaker robustness is.
关键词
Keywords
references
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