28 GHz城市微蜂窝场景中上行与下行信道空间特性

姜涛; 张建华; 唐盼; 田磊

doi:10.1631/FITEE.2000443

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28 GHz城市微蜂窝场景中上行与下行信道空间特性

高通量毫米波无线通信专辑 | Updated：2022-05-19

- 28 GHz城市微蜂窝场景中上行与下行信道空间特性
- A study of uplink and downlink channel spatial characteristics in an urban micro scenario at 28 GHz
- 信息与电子工程前沿（英文） 2021年22卷第4期页码：488-502
- Affiliations：
  
  State Key Lab of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China
- Author bio：
  
  [ "JIANG Tao, E-mail: jet@bupt.edu.cn" ]
  Jianhua ZHANG, jhzhang@bupt.edu.cn
- Funds：
  
  Project supported by the Outstanding Youth Fund of National Natural Science Foundation of China (No. 61925102), the National Key R&D Program of China (No. 2020YFB1805002), the National Natural Science Foundation of China (No. 62031019), and the BUPT-CMCC Joint Innovation Center
- DOI：10.1631/FITEE.2000443
  中图分类号： TN928
- 收稿：2020-08-31，
  
  修回：2021-;2-;4，
  
  网络出版：2021-03-29，
  
  纸质出版：2021-04
- Accepted：
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姜涛, 张建华, 唐盼, 等. 28 GHz城市微蜂窝场景中上行与下行信道空间特性[J]. 信息与电子工程前沿（英文）, 2021,22(4):488-502.

Tao JIANG, Jianhua ZHANG, Pan TANG, et al. A study of uplink and downlink channel spatial characteristics in an urban micro scenario at 28 GHz[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(4): 488-502.
姜涛, 张建华, 唐盼, 等. 28 GHz城市微蜂窝场景中上行与下行信道空间特性[J]. 信息与电子工程前沿（英文）, 2021,22(4):488-502. DOI： 10.1631/FITEE.2000443.

Tao JIANG, Jianhua ZHANG, Pan TANG, et al. A study of uplink and downlink channel spatial characteristics in an urban micro scenario at 28 GHz[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(4): 488-502. DOI： 10.1631/FITEE.2000443.

摘要

Abstract

This paper presents an empirical study of the uplink and downlink azimuth angle of arrival (AoA) in an urban micro (UMi) scenario at 28 GHz. At present

most UMi measurements are conducted in the downlink and then the uplink situation is inferred assuming channel reciprocity. Although the channel correlation coefficient of the uplink and downlink can be as high as 0.8

this does not mean that they are the same. Only a real uplink measurement can accurately describe its channel conditions

and this is what this study does. A receiver equipped with a rotatable horn antenna is mounted at the base station and the user terminal

respectively

in simulating the uplink and downlink. To improve the angular resolution

we extract the multipath components (MPCs) using the space-alternating generalized expectation-maximization algorithm. Also

a spatial lobe approach is used to cluster the MPCs in the power angular spectrum. By matching MPCs with objects in the environment

we find that direct propagation and first-order reflections are dominant in line-of-sight and non-line-of-sight cases. By comparing our measurement with those in standard channel models

we verify that the AoA of clusters follows a Gaussian distribution in the uplink and downlink. In addition

a two-dimensional Gaussian distribution for ray AoA and power is established to reflect their correlation.

关键词

Keywords

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