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
Map-Assisted Constellation Design for mmWave WDM With OAM in Short-Range LOS Environment
IEEE Open Journal of the Communications Society, 2023 We consider a system that integrates positioning and single-user millimeter wave (mmWave) communication, where the communication part adopts wavelength division multiplexing (WDM) and orbital angular momentum (OAM).
Yuan Wang +3 more
doaj +1 more source
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
Performance assessment of GPS/GLONASS single point positioning in an urban environment [PDF]
, 2013 In signal-degraded environments such as urban canyons and mountainous area, many GNSS signals are either blocked or strongly degraded by natural and artificial obstacles.
Angrisano, A., Gaglione, S., Gioia, C.
core +1 more source
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
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
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
A novel design on multi-layer satellite constellation network
上海师范大学学报. 自然科学版, 2016 With the increasing demand of space technology,the traditional single layer satellite constellation network is restricted in the development of future space technology because of its simple structure.For this reason,more and more researchers have carried
LI Lianqiang +4 more
doaj +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
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