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• W2964954002 abstract "Channel charting (CC) has been proposed recently to enable logical positioning of user equipments (UEs) in the neighborhood of a multi-antenna base-station solely from channel-state information (CSI). CC relies on dimensionality reduction of high-dimensional CSI features in order to construct a channel chart that captures spatial and radio geometries so that UEs close in space are close in the channel chart. In this paper, we demonstrate that autoencoder (AE)-based CC can be augmented with side information that is obtained during the CSI acquisition process. More specifically, we propose to include pairwise representation constraints into AEs with the goal of improving the quality of the learned channel charts. We show that such representation-constrained AEs recover the global geometry of the learned channel charts, which enables CC to perform approximate positioning without global navigation satellite systems or supervised learning methods that rely on extensive and expensive measurement campaigns." @default.
• W2964954002 created "2019-08-13" @default.
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• W2964954002 date "2019-08-07" @default.
• W2964954002 modified "2023-09-25" @default.
• W2964954002 title "Improving Channel Charting with Representation-Constrained Autoencoders" @default.
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• W2964954002 doi "https://doi.org/10.48550/arxiv.1908.02878" @default.
• W2964954002 hasPublicationYear "2019" @default.
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