SISO RIS-Enabled Joint 3D Downlink Localization and Synchronization
Paper in proceeding, 2021

We consider the problem of joint three-dimensional localization and synchronization for a single-input single-output (SISO) multi-carrier system in the presence of a reconfigurable intelligent surface (RIS), equipped with a uniform planar array. First, we derive the Cramér-Rao bounds (CRBs) on the estimation error of the channel parameters, namely, the angle-of-departure (AOD), composed of azimuth and elevation, from RIS to the user equipment (UE) and times-of-arrival (TOAs) for the path from the base station (BS) to UE and BS-RISUE reflection. In order to avoid high-dimensional search over the parameter space, we devise a low-complexity estimation algorithm that performs two 1D searches over the TOAs and one 2D search over the AODs. Simulation results demonstrate that the considered RIS-aided wireless system can provide submeter-level positioning and synchronization accuracy, materializing the positioning capability of Beyond 5G networks even with single-antenna BS and UE. Furthermore, the proposed estimator is shown to attain the CRB at a wide interval of distances between UE and RIS. Finally, we also investigate the scaling of the position error bound with the number of RIS elements.

Reconfigurable intelligent surface

localization

Cramér-Rao bound

position error bound

Author

Kamran Keykhosravi

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Furkan Keskin

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

G. Seco-Granados

Universitat Autonoma de Barcelona (UAB)

Henk Wymeersch

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

IEEE International Conference on Communications

15503607 (ISSN)

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

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Swedish Research Council (VR) (2018-03701), 2018-12-01 -- 2021-12-31.

A New Waveform for Joint Radar and Communications Beyond 5G

European Commission (EC) (888913-OTFS-RADCOM), 2020-09-01 -- 2022-08-31.

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/ICC42927.2021.9500281

More information

Latest update

12/2/2021