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arXiv · 1903.12589

Coordinated Beam Selection in Millimeter Wave Multi-User MIMO Using Out-of-Band Information

Flavio Maschietti·David Gesbert·Paul de Kerret
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Abstract

Using out-of-band (OOB) side-information has recently been shown to accelerate beam selection in single-user millimeter wave (mmWave) massive 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. To enforce coordination, we propose an exchange protocol exploiting device-to-device communications, where low-rate beam-related information is exchanged between the mobile terminals. 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 side, thereby triggering substantial spectral efficiency gains.

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Flavio Maschietti, David Gesbert, Paul de Kerret. 2019-03-29. Coordinated Beam Selection in Millimeter Wave Multi-User MIMO Using Out-of-Band Information. https://arxiv.org/abs/1903.12589

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