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On the Energy Efficiency of Limited-Backhaul Cell-Free Massive MIMO
Univ York, England; Univ Surrey, England.
Univ York, England.
Univ York, England.
Queens Univ Belfast, North Ireland.
Visa övriga samt affilieringar
2019 (Engelska)Ingår i: ICC 2019 - 2019 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC), IEEE , 2019Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We investigate the energy efficiency performance of cell-free Massive multiple-input multiple-output (MIMO), where the access points (APs) are connected to a central processing unit (CPU) via limited-capacity links. Thanks to the distributed maximum ratio combining (MRC) weighting at the APs, we propose that only the quantized version of the weighted signals are sent back to the CPU. Considering the effects of channel estimation errors and using the Bussgang theorem to model the quantization errors, an energy efficiency maximization problem is formulated with per-user power and backhaul capacity constraints as well as with throughput requirement constraints. To handle this non-convex optimization problem, we decompose the original problem into two sub-problems and exploit a successive convex approximation (SCA) to solve original energy efficiency maximization problem. Numerical results confirm the superiority of the proposed optimization scheme.

Ort, förlag, år, upplaga, sidor
IEEE , 2019.
Serie
IEEE International Conference on Communications, ISSN 1550-3607, E-ISSN 1938-1883
Nationell ämneskategori
Telekommunikation
Identifikatorer
URN: urn:nbn:se:liu:diva-161869DOI: 10.1109/ICC.2019.8761134ISI: 000492038800088ISBN: 978-1-5386-8088-9 (digital)ISBN: 978-1-5386-8089-6 (tryckt)OAI: oai:DiVA.org:liu-161869DiVA, id: diva2:1369326
Konferens
IEEE International Conference on Communications (ICC)
Anmärkning

Funding Agencies|H2020-MSCA-RISE-2015 [690750]; U.K. Engineering and Physical Sciences Research CouncilEngineering & Physical Sciences Research Council (EPSRC) [EP/N020391/1]

Tillgänglig från: 2019-11-11 Skapad: 2019-11-11 Senast uppdaterad: 2019-11-11

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Larsson, Erik G
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