@inproceedings{998b582e132c4144bc9394200972786a,
title = "Multi-Stage Estimation for 3D Joint Localization in SIMO Systems with Hybrid RIS",
abstract = "This paper focuses on the joint three-dimensional (3D) localization and synchronization problem for a user equipment (UE) and a hybrid reconfigurable intelligent surface (HRIS) in a far-field scenario under single-input multiple-output (SIMO) system. A multi-stage estimation approach, which consists of constructing a maximum likelihood (ML) framework. First, root-MUSIC algorithm is used to estimate the time-of-arrival (TOA) in each channel. Subsequently, the signal received at the HRIS terminal is exploited to formulate an ML estimator. The angular parameters in the channel are estimated through 2D searchs. Finally, derive the location parameters based on the channel parameters. The simulation results indicate that the mean square error performance of the estimated channel and position parameters approaches the Cram{\'e}r-Rao bound.",
keywords = "Cram{\'e}r-Rao bound, Hybrid reconfigurable intelligent surface, localization, OFDM, synchronization",
author = "Tao Gong and Hua Chen and Songjie Yang and Wei Liu and Chau Yuen and So, \{Hing Cheung\}",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 2025 IEEE/CIC International Conference on Communications in China, ICCC 2025 ; Conference date: 10-08-2025 Through 13-08-2025",
year = "2025",
month = sep,
doi = "10.1109/ICCC65529.2025.11148902",
language = "English",
series = "2025 IEEE/CIC International Conference on Communications in China:Shaping the Future of Integrated Connectivity, ICCC 2025",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1--5",
booktitle = "2025 IEEE/CIC International Conference on Communications in China:Shaping the Future of Integrated Connectivity, ICCC 2025",
}