大规模MIMO系统中基于图着色的半动态导频分配

许方敏; 钱慧; 曹海燕

doi:10.11959/j.issn.1000-0801.2020184

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大规模MIMO系统中基于图着色的半动态导频分配

研究与开发 | 更新时间：2024-06-05

- 大规模MIMO系统中基于图着色的半动态导频分配
- Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems
- 电信科学 2020年36卷第11期页码：39-46
- 作者机构：
- 作者简介：
  
  [ "许方敏（1980- ），女，博士，杭州电子科技大学通信工程学院讲师，主要研究方向为大规模天线系统物理层安全、无限资源分配策略等" ]
  [ "钱慧（1994- ），女，杭州电子科技大学通信工程学院硕士生，主要研究方向为无线通信、大规模天线系统的导频污染、导频资源分配策略等" ]
  [ "曹海燕（1975- ），女，博士，杭州电子科技大学通信工程学院副教授，主要研究方向为无线通信系统的信道编码、信号检测、LTE物理层标准等" ]
- 基金信息：
  
  浙江自然科学基金资助项目;The National Natural Science Foundation of Zhejiang Province of China(LY20F10009)
- DOI：10.11959/j.issn.1000-0801.2020184
  中图分类号： TN929.5
- 网络出版日期：2020-11，
  
  纸质出版日期：2020-11-20
- 稿件说明：
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许方敏, 钱慧, 曹海燕. 大规模MIMO系统中基于图着色的半动态导频分配[J]. 电信科学, 2020,36(11):39-46.

Fangmin XU, Hui QIAN, Haiyan CAO. Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems[J]. Telecommunications science, 2020, 36(11): 39-46.
许方敏, 钱慧, 曹海燕. 大规模MIMO系统中基于图着色的半动态导频分配[J]. 电信科学, 2020,36(11):39-46. DOI： 10.11959/j.issn.1000-0801.2020184.

Fangmin XU, Hui QIAN, Haiyan CAO. Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems[J]. Telecommunications science, 2020, 36(11): 39-46. DOI： 10.11959/j.issn.1000-0801.2020184.

摘要

针对大规模MIMO系统中存在的导频污染问题，提出了一种基于图着色的半动态导频分配方案。首先，推导出各个小区可以复用导频的用户与其服务基站的最大距离门限。然后，根据该门限值将系统内各小区的用户分为小区中心用户和小区边缘用户；允许各个小区门限值之内的用户（小区中心用户）复用相同的导频；最后，基于图着色理论协同分配各个小区的小区边缘用户的导频，达到降低导频干扰的目的。仿真结果显示，该方案减少了用户间的导频干扰，有效地提升了整个系统的上行可达和速率。

Abstract

To alleviate the performance loss caused by pilot contamination in massive multiple-input multiple-output (MIMO) systems

a semi-dynamic pilot allocation scheme based on graph coloring was proposed.Firstly

a pilot reuse threshold was derived for users.Then

based on the pilot reuse threshold

users of each cell are divided into cell-center users and cell-edge users

where cell-center users were allowed to reuse the same pilot.Finally

based on the graph coloring theory

the pilot resources were allocated to cell-edge users with serious pilot interference by multi-cell coordination.The simulation results show that the proposed pilot allocation scheme reduces the pilot interference and improves the uplink achievable rate of the whole system effectively.

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references

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