arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2501.01431cs.ITcs.LGeess.SPmath.IT
收藏

利用信道图谱进行CSI压缩

CSI Compression using Channel Charting

Univ Rennes(雷恩大学);INSA Rennes(雷恩国立应用科学学院);CNRS(法国国家科学研究中心);IETR-UMR 6164(雷恩电子与电信研究所);Mitsubishi Electric R&D Centre Europe(三菱电机欧洲研发中心)

Baptiste Chatelier, Vincent Corlay, Matthieu Crussière, Luc Le Magoarou

AI总结:

本文研究将无监督降维方法信道图谱用于FDD系统中的CSI压缩,利用图谱位置作为CSI的低维表示,并在真实感合成数据上与基线方法对比,验证了该方法的有效性。

摘要:

在频分双工(FDD)系统中,要获得多天线通信系统的收益,需要移动用户向基站(BS)上报信道状态信息(CSI)。在过去的几十年中,由于基站天线数量的急剧增加,需要采集的CSI量变得极具挑战性。为了减轻与CSI上报相关的开销,人们提出了压缩CSI技术,其思路是在基站从移动用户发送的压缩版本中恢复原始CSI。信道图谱(Channel Charting)是一种无监督降维方法,通过CSI构建无线电环境地图。由于图谱位置从定义上就是CSI的低维表示,因此该方法可被纳入CSI压缩问题的研究范畴。本文研究了信道图谱在基于任务的CSI压缩应用中的性能。在真实感合成数据上将所提方法与基线方法进行了比较,结果显示出良好的前景。

英文摘要:

Reaping the benefits of multi-antenna communication systems in frequency division duplex (FDD) requires channel state information (CSI) reporting from mobile users to the base station (BS). Over the last decades, the amount of CSI to be collected has become very challenging owing to the dramatic increase of the number of antennas at BSs. To mitigate the overhead associated with CSI reporting, compressed CSI techniques have been proposed with the idea of recovering the original CSI at the BS from its compressed version sent by the mobile users. Channel charting is an unsupervised dimensionality reduction method that consists in building a radio-environment map from CSIs. Such a method can be considered in the context of the CSI compression problem, since a chart location is, by definition, a low-dimensional representation of the CSI. In this paper, the performance of channel charting for a task-based CSI compression application is studied. A comparison of the proposed method against baselines on realistic synthetic data is proposed, showing promising results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑