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Mixed Coherent and ...
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Antonioli, Roberto P.Wireless Telecom Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazil.; Instituto Atlântico, Fortaleza, Brazil.
(författare)
Mixed Coherent and Non-Coherent Transmission for Multi-CPU Cell-Free Systems
- Artikel/kapitelEngelska2023
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Institute of Electrical and Electronics Engineers (IEEE),2023
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LIBRIS-ID:oai:DiVA.org:kth-341465
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-341465URI
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https://doi.org/10.1109/ICC45041.2023.10279001DOI
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Språk:engelska
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Sammanfattning på:engelska
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QC 20240108
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Existing works on cell-free systems consider either coherent or non-coherent downlink data transmission and a network deployment with a single central processing unit (CPU). While it is known that coherent transmission outperforms non-coherent transmission when assuming unlimited fronthaul links, the former requires a perfect timing synchronization, which is practically not viable over a large network. Furthermore, relying on a single CPU for geographically large cell-free networks is not scalable. Thus, to realize the expected gains of cell-free systems in practice, alternative transmission strategies for realistic multi-CPU cell-free systems are required. Therefore, this paper proposes a novel downlink data transmission scheme that combines and generalizes the existing coherent and non-coherent transmissions. The proposed transmission scheme, named mixed transmission, works based on the realistic assumption that only the access points (APs) controlled by a same CPU are synchronized, and thus transmit in a coherent fashion, while APs from different CPUs require no synchronism and transmit in a non-coherent manner. We also propose extensions of existing clustering algorithms for multi-CPU cell-free systems with mixed transmission. Simulation results show that the combination of the proposed clustering algorithms with mixed transmission have the potential to perform close to the ideal coherent transmission.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Braga, Iran M.Wireless Telecom Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazil.
(författare)
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Fodor, Gabor,1964-KTH,Reglerteknik,Ericsson Research, Stockholm, Sweden(Swepub:kth)u1cec4wg
(författare)
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Silva, Yuri C.B.Wireless Telecom Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazil.
(författare)
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Freitas, Walter C.Wireless Telecom Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazil.
(författare)
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Wireless Telecom Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazil.; Instituto Atlântico, Fortaleza, Brazil.Wireless Telecom Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazil.
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:ICC 2023 - IEEE International Conference on Communications: Sustainable Communications for Renaissance: Institute of Electrical and Electronics Engineers (IEEE), s. 1068-1073
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