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Träfflista för sökning "WFRF:(Widmer Joerg) srt2:(2021)"

Sökning: WFRF:(Widmer Joerg) > (2021)

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1.
  • Bartoletti, Stefania, et al. (författare)
  • Positioning and Sensing for Vehicular Safety Applications in 5G and Beyond
  • 2021
  • Ingår i: IEEE Communications Magazine. - 0163-6804 .- 1558-1896. ; 59:11, s. 15-21
  • Tidskriftsartikel (refereegranskat)abstract
    • This article presents a shared vision among stakeholders across the value chain on the use of radio positioning and sensing for road safety in the 5G ecosystem. The key enabling technologies and architectural functionalities are explored, focusing on the extremely stringent localization and communication requirements. A case study for joint radar and communication using experimental data showcases the potential of the new enablers that are paving the way toward enhanced road safety in beyond 5G scenarios.
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2.
  • Subramanyam Thoota, Sai, et al. (författare)
  • Site-specific millimeter-wave compressive channel estimation algorithms with hybrid MIMO architectures
  • 2021
  • Ingår i: ITU Journal on Future and Evolving Technologies. - : International Telecommunication Union. - 2616-8375. ; 2:4
  • Tidskriftsartikel (refereegranskat)abstract
    • In this paper, we present and compare three novel model-cum-data-driven channel estimation procedures in a millimeter-wave Multi-Input Multi-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) wireless communication system. The transceivers employ a hybrid analog-digital architecture. We adapt techniques from a wide range of signal processing methods, such as detection and estimation theories, compressed sensing, and Bayesian inference, to learn the unknown virtual beamspace domain dictionary, as well as the delay-and-beamspace sparse channel. We train the model-based algorithms with a site-specific training dataset generated using a realistic ray tracing-based wireless channel simulation tool. We assess the performance of the proposed channel estimation algorithms with the same site's test data. We benchmark the performance of our novel procedures in terms of normalized mean squared error against an existing fast greedy method and empirically show that model-based approaches combined with data-driven customization unanimously outperform the state-of-the-art techniques by a large margin. The proposed algorithms were selected as the top three solutions in the "ML5G-PHY Channel Estimation Global Challenge 2020" organized by the International Telecommunication Union.
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