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Near-Field Hierarchical Beam Management for RIS-Enabled Millimeter Wave Multi-Antenna Systems

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posted on 04.04.2022, 03:58 by George C. Alexandropoulos, Vahid JamaliVahid Jamali, Robert Schober, H. Vincent Poor
In this paper, we present a low overhead beam management approach for near-field millimeter-wave multi-antenna communication systems enabled by Reconfigurable Intelligent Surfaces (RISs). We devise a novel variable-width hierarchical phase-shift codebook suitable for both the near- and far-field of the RIS, and present a fast alignment algorithm for the RIS phase shifts and the transceiver beamformers.

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Email Address of Submitting Author

jamali@princeton.edu

Submitting Author's Institution

Princeton University

Submitting Author's Country

United States of America