Objective
Radio localization is the process of estimating the state (position, orientation, and possibly velocity) of a user equipment with the assistance of one or several base stations within a wireless communication system. With the increased carrier frequency (such as mmWafve and THz band), angle and delay estimation can benefit from the large array size and wide bandwidth, and hence improve localization performance. The estimated position and orientation can, in return, assist communication to increase beamforming gain and reduce delay via proactive resource allocation. As a result, simultaneous localization and communication (SLAC) in the 6G systems will support new use cases that require low latency, high data rate, and high localization accuracy, such as digital twins, virtual reality, and tactile networks. To support SLAC systems, reconfigurable intelligent surface (RIS) is a key technique that can provide increased channel gain and coverage for communication, which can also act as a passive anchor to enable/enhance localization. However, the system models used in existing localization works are either too simple or too ideal. To fully exploit the potential of RIS-aided localization, the impairment factors need to be considered, including the near-field effect, multipath, anchor calibration error, and hardware impairments. In this project, we will first develop a RIS-aided SLAC system model with performance analysis on the effect of the impairment factors. Then, a localization pipeline will be formulated with corresponding model-based algorithms designed by treating the dominant factors as unknowns. Benchmarked by the model-based methods, the learning-based method will also be developed to solve the challenging localization subtasks. Finally, based on the improvement of new SLAC performance metrics with localization information, we will propose a structured model- and learning-based localization (SMALL) solution to support RIS-aided 6G systems.
Keywords
Programme(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Funding Scheme
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European FellowshipsCoordinator
WC1E 6BT London
United Kingdom