Global Navigation Satellite Systems Engineering, Policy, and Design
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.
Dr. Charles R. Cahn, an important early and continuing contributor to GPS signal and waveform design, passed away in January 2021. His accomplishments spanned a lifetime of contributions to GPS signal and receiver developments.
By Inside GNSS
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.
Development of military Galileo user equipment (MGUE, a new variant) got underway on February 8 with the kick-0ff meeting in Brussels of the Galileo for EU Defence (GEODE) project.
By Inside GNSS
The European Court of Justice in Luxembourg suspended the signing of the €1.47 billion Galileo contracts with Thales Alenia Space and Airbus Defence and Space, after OHB SE, the losing bidder, filed a suit contesting the award.
By Inside GNSS
An international autonomous racing series with electric-powered vehicles will use Trimble’s Applanix POS LVX GNSS-inertial systems in all of its next-generation autonomous race cars in 2021, as part of an extensive technology and marketing partnership.
By Inside GNSS
The value of the GPS SPS PS goes far beyond the specific parameters that it contains. It has a great deal of information regarding how GPS operates and ideally should be read in full (including the appendices) by everyone who works with GPS at the measurement level.
China has released four national technical standards for the BeiDou Navigation Satellite System (BDS), according to the China Satellite Navigation Office, for fields of the data format, map application, ground-based augmentation system and atomic clock.
By Inside 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.
By Inside GNSS
By Logan Scott
The U.S. Department of Transportation’s (DoT’s) “Complementary PNT and GPS Backup Technologies Demonstration Report” released this January has some excellent data on the relative performances of various systems in timing and positioning.
By Inside GNSS
On March 3 a Galileo Performance Workshop, open to anyone interested in GNSS and led by the European GNSS Agency (GSA), will offer an in-depth analysis of the performance of the Galileo constellation and signals and how they are evaluated for users.
By Inside GNSS
A monitoring system developed through a European Space Agency (ESA)-backed project detects interference with satellite navigation signals in use at strategic or safety-critical sites.
By Inside GNSS
The European Navigation Conference and the Royal Institute of Navigation’s (RIN’s) International Navigation Conference are one and the same in 2021. They convene jointly and virtually as Navigation 2021, from November 15 to 18.
By Inside GNSS
