Interference analysis of Positioning Reference Signals in 5G NTN
arxiv(2024)
摘要
Accurate asset localization holds paramount importance across various
industries, ranging from transportation management to search and rescue
operations. In scenarios where traditional positioning equations cannot be
adequately solved due to limited measurements obtained by the receiver, the
utilization of Non-Terrestrial Networks (NTN) based on Low Earth Orbit (LEO)
satellites can prove pivotal for precise positioning. The decision to employ
NTN in lieu of conventional Global Navigation Satellite Systems (GNSS) is
rooted in two key factors. Firstly, GNSS systems are susceptible to jamming and
spoofing attacks, thereby compromising their reliability, where LEO satellites
link budgets can benefit from a closer distances and the new mega
constellations could offer more satellites in view than GNSS. Secondly, 5G
service providers seek to reduce dependence on third-party services. Presently,
the NTN operation necessitates a GNSS receiver within the User Equipment (UE),
placing the service provider at the mercy of GNSS reliability. Consequently,
when GNSS signals are unavailable in certain regions, NTN services are also
rendered inaccessible.
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