RIS-Enabled Self-Localization: Leveraging Controllable Reflections With Zero Access Points
Paper i proceeding, 2022

Reconfigurable intelligent surfaces (RISs) are one of the most promising technological enablers of the next (6th) generation of wireless systems. In this paper, we introduce a novel use-case of the RIS technology in radio localization, which is enabling the user to estimate its own position via transmitting orthogonal frequency-division multiplexing (OFDM) pilots and processing the signal reflected from the RIS. We demonstrate that user localization in this scenario is possible by deriving Cramér-Rao lower bounds on the positioning error and devising a low-complexity position estimation algorithm. We consider random and directional RIS phase profiles and apply a specific temporal coding to them, such that the reflected signal from the RIS can be separated from the uncontrolled multipath. Finally, we assess the performance of our position estimator for an example system, and show that the proposed algorithm can attain the derived bound at high signal-to-noise ratio values.

Radio localization

reconfigurable intelligent surface

maximum likelihood estimation

radar

Författare

Kamran Keykhosravi

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

G. Seco-Granados

Universitat Autonoma de Barcelona (UAB)

G. C. Alexandropoulos

University of Athens

Henk Wymeersch

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

IEEE International Conference on Communications

15503607 (ISSN)

Vol. 2022-May 2852-2857
9781538683477 (ISBN)

2022 IEEE International Conference on Communications, ICC 2022
Seoul, South Korea,

Multidimensionell signalbehandling med frekvenskammar

Vetenskapsrådet (VR) (2018-03701), 2018-12-01 -- 2021-12-31.

Reconfigurable Intelligent Sustainable Environments for 6G Wireless Networks

Europeiska kommissionen (EU) (EC/2020/101017011), 2021-01-01 -- 2023-12-31.

Ämneskategorier

Telekommunikation

Kommunikationssystem

Signalbehandling

DOI

10.1109/ICC45855.2022.9839225

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Senast uppdaterat

2024-01-03