Reconfigurable Intelligent Surface aided Integrated-Navigation-and-Communication in Urban Canyons: A Satellite Selection Approach
Journal:
arXiv
Published Date:
Jul 2, 2025
Abstract
This study investigates the application of a simultaneous transmitting and
reflecting reconfigurable intelligent surface (STAR-RIS)-aided
medium-Earth-orbit (MEO) satellite network for providing both global
positioning services and communication services in the urban canyons, where the
direct satellite-user links are obstructed. Superposition coding (SC) and
successive interference cancellation (SIC) techniques are utilized for the
integrated navigation and communication (INAC) networks, and the composed
navigation and communication signals are reflected or transmitted to ground
users or indoor users located in urban canyons. To meet diverse application
needs, navigation-oriented (NO)-INAC and communication-oriented (CO)-INAC have
been developed, each tailored according to distinct power allocation factors.
We then proposed two algorithms, namely navigation-prioritized-algorithm (NPA)
and communication-prioritized-algorithm (CPA), to improve the navigation or
communication performance by selecting the satellite with the optimized
position dilution of precision (PDoP) or with the best channel gain. The
effectiveness of the proposed STAR-RIS-aided INAC network is quantified by
analyzing the positioning error for navigation services and by evaluating
communication performance through achievable ergodic rate metrics. Our
satellite selection approach indicates that: the positioning services at the
urban canyon users can be completed with the aid of STAR-RIS. 2) Additionally,
it is observed that while a single STAR-RIS array can extend the navigational
link, it fails to serve users in indoor scenarios, highlighting a limitation in
the current system design.
