RIS-Enabled and Access-Point-Free Simultaneous Radio Localization and Mapping
Journal article, 2024

In the upcoming sixth generation (6G) of wireless communication systems, reconfigurable intelligent surfaces (RISs) are regarded as one of the promising technological enablers, which can provide programmable signal propagation. Therefore, simultaneous radio localization and mapping (SLAM) with RISs appears as an emerging research direction within the 6G ecosystem. In this paper, we propose a novel framework of RIS-enabled radio SLAM for wireless operation without the intervention of access points (APs). We first design the RIS phase profiles leveraging prior information for the user equipment (UE), such that they uniformly illuminate the angular sector where the UE is probabilistically located. Second, we modify the marginal Poisson multi-Bernoulli SLAM filter and estimate the UE state and landmarks, which enables efficient mapping of the radio propagation environment. Third, we derive the theoretical Cramér-Rao lower bounds on the estimators for the channel parameters and the UE state. We finally evaluate the performance of the proposed method under scenarios with a limited number of transmissions, taking into account the channel coherence time. Our results demonstrate that the RIS enables solving the radio SLAM problem with zero APs, and that the consideration of the Doppler shift contributes to improving the UE speed estimates.

phase profile design

Wireless sensor networks

localization

mapping

Location awareness

6G mobile communication

6G

Simultaneous localization and mapping

Sensors

SLAM

Signal to noise ratio

Poisson multi-Bernoulli

reconfigurable intelligent surface

Doppler shift

Wireless communication

Author

Hyowon Kim

Chungnam National University

Hui Chen

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Musa Furkan Keskin

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Yu Ge

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Kamran Keykhosravi

Ericsson

G. C. Alexandropoulos

University of Athens

Sunwoo Kim

Hanyang University

Henk Wymeersch

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

IEEE Transactions on Wireless Communications

15361276 (ISSN) 15582248 (eISSN)

Vol. 23 4 3344-3360

Integrated Sensing, Localization, and Communications in 6G THz Systems

European Commission (EC) (101065422-6G-ISLAC), 2023-01-01 -- 2024-12-31.

Reconfigurable Intelligent Sustainable Environments for 6G Wireless Networks

European Commission (EC) (EC/2020/101017011), 2021-01-01 -- 2023-12-31.

Areas of Advance

Information and Communication Technology

Transport

Subject Categories

Telecommunications

Human Aspects of ICT

Communication Systems

Signal Processing

DOI

10.1109/TWC.2023.3307455

More information

Latest update

4/27/2024