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Data-Driven Robust Beamforming for Initial Access
Linköpings universitet, Institutionen för systemteknik, Kommunikationssystem. Linköpings universitet, Tekniska fakulteten.
Ericsson Res, Sweden.
Linköpings universitet, Institutionen för systemteknik, Kommunikationssystem. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0002-7599-4367
2023 (Engelska)Ingår i: IEEE CONFERENCE ON GLOBAL COMMUNICATIONS, GLOBECOM, IEEE , 2023, s. 5757-5762Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We consider a robust beamforming problem where large amount of downlink (DL) channel state information (CSI) data available at a multiple antenna access point (AP) is used to improve the link quality to a user equipment (UE) for beyond-5G and 6G applications such as environment-specific initial access (IA) or wireless power transfer (WPT). As the DL CSI available at the current instant may be imperfect or outdated, we propose a novel scheme which utilizes the (unknown) correlation between the antenna domain and physical domain to localize the possible future UE positions from the historical CSI database. Then, we develop a codebook design procedure to maximize the minimum sum beamforming gain to that localized CSI neighborhood. We also incorporate a UE specific parameter to enlarge the neighborhood to robustify the link further. We adopt an indoor channel model to demonstrate the performance of our solution, and benchmark against a usually optimal (but now sub-optimal due to outdated CSI) maximum ratio transmission (MRT) and a subspace based method. We numerically show that our algorithm outperforms the other methods by a large margin. This shows that customized environment-specific solutions are important to solve many future wireless applications, and we have paved the way to develop further data-driven approaches.

Ort, förlag, år, upplaga, sidor
IEEE , 2023. s. 5757-5762
Serie
IEEE Global Communications Conference, ISSN 2334-0983, E-ISSN 2576-6813
Nyckelord [en]
6G; beyond-5G; codebook; data-driven; initial access; robust beamforming
Nationell ämneskategori
Kommunikationssystem
Identifikatorer
URN: urn:nbn:se:liu:diva-202556DOI: 10.1109/GLOBECOM54140.2023.10437781ISI: 001178562006053ISBN: 9798350310900 (digital)ISBN: 9798350310917 (tryckt)OAI: oai:DiVA.org:liu-202556DiVA, id: diva2:1852000
Konferens
IEEE Conference on Global Communications (IEEE GLOBECOM) - Intelligent Communications for Shared Prosperity, Kuala Lumpur, MALAYSIA, dec 04-08, 2023
Anmärkning

Funding Agencies|REINDEER project of the European Union's Horizon 2020 research and innovation program [101013425]

Tillgänglig från: 2024-04-16 Skapad: 2024-04-16 Senast uppdaterad: 2024-04-16

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Thoota, Sai SubramanyamLarsson, Erik G
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