Ultra-low power GNSS L5 band snapshot positioning: A two step approach

Tsang, C.-L., Hoi-Wah, Ng, Luo, Y., Hai, Di, Hsu, L.-T.

IEEE Internet of Things Journal (2026)

journal Q1

A two-step snapshot architecture: Step 1 uses the L1 band for coarse snapshot positioning to refine the position and time uncertainty; Step 2 uses that estimate to narrow the L5 acquisition search range for low-power, high-sensitivity L5 positioning.

Key idea. The two-step approach leverages the L1 band signal to perform coarse snapshot positioning, thereby refining the position estimate and time uncertainty to narrow the L5 band signal’s acquisition search range. This reduces power consumption while simultaneously exploiting the L5 band’s enhanced sensitivity and higher positioning accuracy. (IEEE Internet of Things Journal, 2026, Q1.)