When 5G NTN Meets GNSS: Tracking GNSS Signals under Overlaid 5G Waveforms
Idir Edjekouane, Alejandro Gonz\'alez Garrido, Jorge Querol, Symeon Chatzinotas

TL;DR
This study demonstrates that GNSS signals can be reliably tracked and demodulated even when overlaid with 5G waveforms, enabling joint communication and positioning with minimal receiver modifications.
Contribution
It provides the first quantitative analysis of GNSS performance under hybrid 5G waveform interference, showing feasibility for joint communication and positioning.
Findings
Reliable demodulation across wide SINR ranges for low and medium dynamics
High dynamics impose strict lock limits on GNSS tracking
Feasibility of JCAP with near-legacy GNSS chipsets
Abstract
Global Navigation Satellite Systems (GNSS) provide the backbone of Positioning, Navigation, and Timing (PNT) but remain vulnerable to interference. Low Earth Orbit (LEO) constellations within Fifth-Generation (5G) Non-Terrestrial Networks (NTN) can enhance resilience by jointly supporting communication and navigation. This paper presents the first quantitative analysis of GNSS tracking and navigation message demodulation under a hybrid waveform where a low-power Direct-Sequence Spread Spectrum (DSSS) component is overlaid on an Orthogonal Frequency-Division Multiplexing (OFDM) 5G downlink. We evaluate a minimally modified GNSS receiver that tracks a legacy Global Positioning System (GPS) L1 Coarse/Acquisition (C/A) overlay aligned with 5G frames while treating the 5G waveform as structured interference. Using Monte Carlo simulations under realistic LEO Doppler dynamics, we analyze the…
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Taxonomy
TopicsGNSS positioning and interference · Satellite Communication Systems · Soil Moisture and Remote Sensing
