Graduate School and Research Center in Digital Sciences

Coordinated beam selection in millimeter wave multi-user MIMO using out-of-band information

Maschietti, Flavio; Gesbert, David; de Kerret, Paul

ICC 2019, 53rd IEEE International Conference on Communications, 20-24 May 2019, Shanghai, China

Using out-of-band (OOB) side-information has recently been shown to accelerate beam selection in single-user millimeter wave (mmWave) massive MIMO (m-MIMO) communications. In this paper, we propose a novel OOB-aided beam selection framework for a mmWave uplink multi-user system. In particular, we exploit spatial information extracted from lower (sub-6 GHz) bands in order to assist with an inter-user coordination scheme at mmWave bands. Our strategies consider the existence of a low-rate direct device-to-device (D2D) link between suitable pairs of users (UEs), enabling some information exchange. The decentralized coordination mechanism allows the suppression of the so-called co-beam interference which would otherwise lead to irreducible interference at the base station (BS) side, thereby triggering substantial spectral efficiency (SE) gains.

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Title:Coordinated beam selection in millimeter wave multi-user MIMO using out-of-band information
Department:Communication systems
Eurecom ref:5836
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Bibtex: @inproceedings{EURECOM+5836, doi = {}, year = {2019}, title = {{C}oordinated beam selection in millimeter wave multi-user {MIMO} using out-of-band information}, author = {{M}aschietti, {F}lavio and {G}esbert, {D}avid and de {K}erret, {P}aul}, booktitle = {{ICC} 2019, 53rd {IEEE} {I}nternational {C}onference on {C}ommunications, 20-24 {M}ay 2019, {S}hanghai, {C}hina }, address = {{S}hanghai, {CHINA}}, month = {05}, url = {} }
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