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CSI Quantization for FDD Massive MIMO Communication

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Vehkalahti, Roope
dc.contributor.author Liao, Jialing
dc.contributor.author Pllaha, Tefjol
dc.contributor.author Han, Wei
dc.contributor.author Tirkkonen, Olav
dc.date.accessioned 2021-09-02T08:46:53Z
dc.date.available 2021-09-02T08:46:53Z
dc.date.issued 2021-06-15
dc.identifier.citation Vehkalahti , R , Liao , J , Pllaha , T , Han , W & Tirkkonen , O 2021 , CSI Quantization for FDD Massive MIMO Communication . in Proceedings of 93rd IEEE Vehicular Technology Conference, VTC 2021 . , 9449010 , IEEE Vehicular Technology Conference , IEEE , IEEE Vehicular Technology Conference , Helsinki , Finland , 25/04/2021 . https://doi.org/10.1109/VTC2021-Spring51267.2021.9449010 en
dc.identifier.isbn 978-1-7281-8964-2
dc.identifier.issn 1090-3038
dc.identifier.issn 2577-2465
dc.identifier.other PURE UUID: b59d222b-01a7-418b-b6a5-f868dd0df6d8
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/b59d222b-01a7-418b-b6a5-f868dd0df6d8
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85112454830&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/61199117/Vehkalahti2021_Precoding.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/109609
dc.description.abstract We consider high-dimensional multiuser MIMO transmissions in Frequency Division Duplexing systems. For precoding, the frequency selective channel has to be measured, quantized and fed back to the base station by the users. In 5G New Radio (NR), a modular quantization approach has been applied for this, where first a low-dimensional subspace is identified for the whole frequency selective channel, and then subband channels are linearly mapped to this subspace and quantized. We analyze how the components in such a modular scheme contribute to the overall quantization distortion. Based on this analysis we improve the technology components in the modular approach. We compare the improved quantization scheme to the 5G NR standardized version by simulation in a scenario with a realistic spatial channel model. The improvements lead to a more than 25% improvement in spectral efficiency. en
dc.format.extent 5
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartof IEEE Vehicular Technology Conference en
dc.relation.ispartofseries Proceedings of 93rd IEEE Vehicular Technology Conference, VTC 2021 en
dc.relation.ispartofseries IEEE Vehicular Technology Conference en
dc.rights openAccess en
dc.title CSI Quantization for FDD Massive MIMO Communication en
dc.type A4 Artikkeli konferenssijulkaisussa fi
dc.description.version Peer reviewed en
dc.contributor.department Communications Theory
dc.contributor.department Department of Communications and Networking
dc.contributor.department Huawei Technologies Co., Ltd.
dc.identifier.urn URN:NBN:fi:aalto-202109028841
dc.identifier.doi 10.1109/VTC2021-Spring51267.2021.9449010
dc.type.version acceptedVersion

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