Near-field Localization with a Reconfigurable Intelligent Surface Acting as Lens
Paper i proceeding, 2021

Exploiting wavefront curvature enables localization with limited infrastructure and hardware complexity. With the introduction of reconfigurable intelligent surfaces (RISs), new opportunities arise, in particular when the RIS is functioning as a lens receiver. We investigate the localization of a transmitter using a RIS-based lens in close proximity to a single receive antenna element attached to reception radio frequency chain. We perform a Fisher information analysis, evaluate the impact of different lens configurations, and propose a two-stage localization algorithm. Our results indicate that positional beamforming can lead to better performance when a priori location information is available, while random beamforming is preferred when a priori information is lacking. Our simulation results for a moderate size lens operating at 28 GHz showcased that decimeter-level accuracy can be attained within 3 meters to the lens.


Z. Abu-Shaban

Cohda Wireless

Kamran Keykhosravi

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Musa Furkan Keskin

Cohda Wireless

G. C. Alexandropoulos

Cohda Wireless

G. Seco-Granados

Cohda Wireless

Henk Wymeersch

Cohda Wireless

IEEE International Conference on Communications

15503607 (ISSN)

Vol. June 2021

2021 IEEE International Conference on Communications, ICC 2021
Virtual, Online, Canada,







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