Columns and Editorials Archives - Page 5 of 37 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Columns and Editorials

March 17, 2021

Catching A Ride: Improvements to Position Accuracy for eMobility Applications

eMobility services that provide on-demand eBikes and eScooters rentals are fast growing alternatives to traditional transportation modalities. As they are affordable, convenient, and very green, eMobility services will continue to grow in popularity. This article presents some of the challenges and useful solutions to accurately track eBike and eScooter location in the real world.

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By Inside GNSS
March 15, 2021

Human Engineering: Rui Hirokawa’s Higher Vision

Dr. Rui Hirokawa is Deputy General Manager, Space Systems Department, at Kamakura Works, Mitsubishi Electric Corporation. A fixture in today’s GNSS community, he manages several QZSS-related projects, including the centimeter-level augmentation service (CLAS), and has recently been deeply involved in the international standardization of high-accuracy GNSS.

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By Peter Gutierrez
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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 8, 2021

Carpe Signum: Seize the Signal

Innovative features of cellular fifth-generation (5G) signals enable the wireless system to play a major role in autonomous technologies. Test results of a ground vehicle navigating with signals from five 5G base stations (gNBs) over a trajectory of 773 m traversed in 110 seconds show a position root mean-squared error of 4.1 m.

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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
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January 26, 2021

LEO PNT Performance Report: STL

Alternative PNT from low-Earth orbit (LEO) satellites is being developed or proposed by various entities. Satelles delivers a fully operational Satellite Time and Location (STL) service to back up or augment GNSS, strengthening the resilience of critical infrastructure. This article details STL’s timing synchronization performance with different types of user equipment.

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By Inside GNSS
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