通信感知一体化中的无线电地图技术

Overview of Radio Map Technologies in Joint Sensing and Communication Systems

大规模多输入多输出(Multiple-Input Multiple-Output,MIMO)技术和毫米波技术赋予了通信系统更强的环境感知能力,而感知到的环境信息也有利于帮助该系统克服固有的窄波束传输和高路径损耗的缺点,共同促进通信感知一体化的产生与发展。无线电地图技术是通信感知一体化的重要组成部分之一,该技术利用感知信息与实际物理位置的关系构建出信息地图,使通信感知结果的展现更加直观和清晰,在感知信息的处理、分析与共享等方面发挥了重要作用。该综述针对无线电地图领域的研究背景和研究现状进行了调研,将现有的无线电地图技术按照实现方式与环境抽象能力的不同分为基于信道参数、基于通信性能和基于无线环境几何特征的3类无线电地图,选取了各类别中典型的研究成果进行详细阐述,并且总结了各类别无线电地图的应用场景与优缺点。

Massive Multiple-Input Multiple-Output(MIMO)and millimeter-wave(mmWave)technologies provide communication systems with powerful sensing abilities.And the captured environment information in return helps the system with its inherent shortcomings of narrow beam transmission and high path loss.Thus they promote the integration of sensing and communication.Radio map technology is one crucial part of joint sensing and communication,which builds information maps according to the relationship between sensing information and its actual physical location.These maps are able to present sensing results in a more straight-forward and clear way,and play an important role in the processing,analyzing and sharing of sensing result.This paper investigates the research background and current progresses in radio map technologies.Current radio map technologies are classified into three categories based on their implementing methods and environment abstraction capabilities.The state-of-the-art radio map algorithms in each category are described in detail and the applicable scenarios,pros and cons of each category are summarized.