An Efficient Codebook Design for Uplink SCMA
IEEE Access, 2020 Sparse code multiple access (SCMA) is one of the most intensively investigated non-orthogonal multiple access (NOMA) techniques for the fifth generation communication (5G) system. In this paper, a new multi-stage optimization approach for codebook design
Mengyao Gao +3 more
doaj +1 more source
An assessment of the precise products on static Precise Point Positioning using Multi-Constellation GNSS [PDF]
, 2018 Precise point positioning (PPP) is highly dependent on the precise ephemerides and satellite clock products that are used. Different ephemeris and clock products are available from a variety of different organizations.
Bingley, R.M. +3 more
core +1 more source
Satellite mapping in cities and below cities: how good is it now? [PDF]
, 2016 Global navigation satellite systems (GNSS) have existed since the launch of the US global positioning system constellation in 1978. There is an increasing need for better maps in the digital age, particularly for buried utilities.
Barnes J +21 more
core +1 more source
Accuracy assessment of Precise Point Positioning with multi-constellation GNSS data under ionospheric scintillation effects [PDF]
, 2018 GPS and GLONASS are currently the Global Navigation Satellite Systems (GNSS) with full 16 operational capacity. The integration of GPS, GLONASS and future GNSS constellations can 17 provide better accuracy and more reliability in geodetic positioning, in
Aquino +29 more
core +8 more sources
Fast Multiple Fault Detection and Exclusion (FM-FDE) Algorithm for Standalone GNSS Receivers
IEEE Open Journal of the Communications Society, 2021 Numerous applications and devices use Global Navigation Satellite System (GNSS)-provided position, velocity and time (PVT) information. However, unintentional interference and malicious attacks render GNSS-provided information unreliable.
Kewei Zhang, Panos Papadimitratos
doaj +1 more source
Multi-Frequency Precise Point Positioning using GPS and Galileo data with smoothed ionospheric corrections [PDF]
, 2018 The poor signal visibility and continuity associated with urban environments together with the slow convergence/reconvergence time of Precise Point Positioning (PPP), usually makes PPP unsuitable for land navigation in cities.
Basile, Francesco +4 more
core +1 more source
Multi-constellation GBAS: How to benefit from a second constellation [PDF]
2016 IEEE/ION Position, Location and Navigation Symposium (PLANS), 2016 In this paper we analyze and discuss the impact of ionospheric scintillations and multipath on the availability of the current single-frequency single-constellation Ground Based Augmentation System (GBAS). Scintillation effects, which usually occur around plasma bubbles, cause the receiver to lose lock of one or more satellites, leading to potentially ...
Caamano, Maria +3 more
openaire +3 more sources
L1 SFMC SBAS Message for Service Expansion of Multi-Constellation GNSS Support
IEEE Access, 2023 Currently operating satellite-based augmentation systems (SBASs) provide an augmentation service that improves global positioning system (GPS) performance at 250 bps via the L1 signal.
Cheolsoon Lim +2 more
doaj +1 more source
Multisensor navigation systems: a remedy for GNSS vulnerabilities? [PDF]
, 2016 Space-based positioning, navigation, and timing (PNT) technologies, such as the global navigation satellite systems (GNSS) provide position, velocity, and timing information to an unlimited number of users around the world.
Grejner-Brzezinska, Dorota A. +5 more
core +2 more sources
High-precision multi-constellation GNSS: methods, selected applications and challenges [PDF]
Measurement Science and Technology, 2019 In recent years, significant advances have been made in the field of global navigation satellite systems (GNSS) algorithms and new applications.
Paziewski, Jacek, Crespi, Mattia
openaire +2 more sources