Pilot Decontamination in Massive Multiantenna Systems

大规模多天线系统中的先导净化

• 批准号: 251880705
• 负责人: Professor Dr.-Ing. Wolfgang Gerstacker
• 金额: --
• 依托单位: Department Elektrotechnik-Elektronik-Informationstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/251880705?language=en
• 关键词: Pilot; Decontamination; Massive; Multiantenna; Systems

This research proposal aims to reduce the energy consumption of wireless communication systems while striving for higher data rates. A promising approach to this end are multi-antenna systems with a large number of antenna elements. In literature, these are commonly referred to as "massive" multi-antenna systems.Massive multi-antenna systems allow for a drastic reduction of radiated signal power. Most currently proposed systems suffer from an adverse effect called "pilot contamination". This effect is due to unavoidable reuse of pilot signal is adjacent cells and was believed by many researchers to be a fundamental shortcoming of massive multi-antenna systems. Recently, some of the applicants have outlined a method, referred to as "pilot decontamination" to overcome pilot contamination based on singular value decomposition and power control. Initial theoretical studies on the uplink channel indicate that the method is very powerful and that pilot contamination is not a fundamental effect, but can be overcome by means of nonlinear channel estimation. In this project, pilot decontamination shall be studied in greater detail.In particular, it shall be investigated how it can be utilized for downlink transmission and which handover protocols are suitable.Furthermore, it shall be studied how massive a multi-antenna system needs to be such that pilot decontamination will work reliably.Particular effort shall be devoted to find an efficient way to implement pilot decontamination in practice.

该研究提案旨在降低无线通信系统的能耗，同时争取更高的数据速率。为此，一种有前途的方法是具有大量天线元件的多天线系统。在文献中，这些通常被称为“大规模”多天线系统。大规模多天线系统可以大幅降低辐射信号功率。大多数目前提出的系统遭受称为“导频污染”的不利影响。这种效应是由于相邻小区不可避免地重复使用导频信号，许多研究人员认为这是大规模多天线系统的一个根本缺点。最近，一些申请人已经概述了一种称为“导频净化”的方法，以基于奇异值分解和功率控制来克服导频污染。对上行信道的初步理论研究表明，该方法是非常强大的，导频污染不是一个根本的影响，但可以克服的非线性信道估计。在本项目中，应更详细地研究导频去污。特别是，应研究如何将其用于下行链路传输以及哪种切换协议是合适的。此外，应研究多天线系统需要多大的规模才能使导频去污可靠地工作。应特别努力找到在实践中实施导频去污的有效方法。

项目成果

Blind Pilot Decontamination in Massive MIMO by Independent Component Analysis

• DOI: 10.1109/glocomw.2017.8269156
• 发表时间: 2017-12
• 期刊: 2017 IEEE Globecom Workshops (GC Wkshps)
• 作者: Ebrahim Amiri;R. Müller;W. Gerstacker

Semi-Blind Channel Estimation for Massive MIMO Systems Exploiting Low-Rank Matrix Reconstruction

利用低秩矩阵重构的大规模 MIMO 系统的半盲信道估计

• DOI: 10.1109/wpmc50192.2020.9309518
• 发表时间: 2020
• 期刊: 2020 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC)
• 作者: Ebrahim;Müller;Gerstacker;Wolfgang
• 通讯作者: Wolfgang