Real-Time Robust Receiver Processing for Broadband LEO PNT

Develop robust acquisition and tracking methods and low-complexity receiver architectures that maintain real-time operation for broadband LEO PNT signals under large and rapidly varying Doppler shifts, wide bandwidths, simultaneous multi-satellite processing, and practical computational constraints.

Background

Broadband LEO satellites produce large Doppler shifts and rapid Doppler variations, which enlarge acquisition search spaces and make carrier, phase, and code tracking more difficult. The wide bandwidth of these signals also creates substantial receiver-processing demands, especially when signals from multiple satellites are handled simultaneously.

The paper notes that existing techniques based on Doppler compensation, auxiliary information, and advanced tracking loops can improve adaptability but may increase computational overhead and implementation complexity. It therefore identifies the unresolved need for receiver designs that simultaneously provide robust acquisition and tracking, real-time operation, and low implementation complexity.

References

In practical systems, it remains challenging to maintain robust acquisition and tracking while satisfying the real-time processing and complexity constraints of Broadband LEO PNT receivers.

— Broadband LEO Satellite Constellations for Next-Generation Navigation: Potentials, Enabling Technologies, and Challenges  (2610.02640 - Li et al., 2 Oct 2026) in Section 6, subsection “Robust Receiver Processing”