RIS-aided joint localization and synchronization with a single-antenna mmwave receiver
Paper in proceeding, 2021

MmWave multiple-input single-output (MISO) systems using a single-antenna receiver are regarded as a promising solution for the near future, before the full-fledged 5G MIMO will be widespread. However, for MISO systems synchronization cannot be performed jointly with user localization unless two-way transmissions are used. In this paper we show that thanks to the use of a reconfigurable intelligent surface (RIS), joint localization and synchronization is possible with only downlink MISO transmissions. The direct maximum likelihood (ML) estimator for the position and clock offset is derived. To obtain a good initialization for the ML optimization, a decoupled, relaxed estimator of position and delays is also devised, which does not require knowledge of the clock offset. Results show that the proposed approach attains the Cramér-Rao lower bound even for moderate values of the system parameters.


Reconfigurable intelligent surface





Alessio Fascista

University of Salento

Angelo Coluccia

University of Salento

Henk Wymeersch

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

G. Seco-Granados

Universitat Autonoma de Barcelona (UAB)

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

15206149 (ISSN)

Vol. 2021-June 4455-4459

2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021
Virtual, Toronto, Canada,

Areas of Advance

Information and Communication Technology

Subject Categories


Communication Systems

Signal Processing



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