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PNT

February 10, 2021

Link-Layer Coding: A Way to Speed-Up Nex-Gen GNSS

A new approach to facilitate fast and/or reliable reception and decoding of the navigation message in harsh radio propagation conditions derives from digital communications. Link-layer coding (LLC) techniques improve times-to-first-fix (TTFFs) over legacy carousel transmissions and achieve near-optimal performance with a limited complexity increase.

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By Inside GNSS
February 4, 2021

Supercorrelation Plus 3D Mapping-Aided GNSS

Inertially-aided extended coherent integration makes a GNSS receiver more sensitive to directly received signals than to reflected signals whenever the receiver is moving. 3D-mapping-aided GNSS uses predictions of which signals are NLOS to enhance the positioning algorithms. Both techniques can improve positioning accuracy in dense urban areas by more than a factor of two. This article investigates the benefits of combining them.

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By Inside GNSS