Results 71 to 80 of about 251 (164)

Comparing Positioning Performance of LEO Mega-Constellations and GNSS in Urban Canyons

IEEE Access
The use of Low Earth Orbit (LEO) mega-constellations for Positioning, Navigation, and Timing (PNT) services has attracted a great deal of interest, as they could complement the Global Navigation Satellite System (GNSS) in specific conditions/environments.
Harshal More, Ernestina Cianca, Mauro De Sanctis   +2 more
doaj   +1 more source

Joint pseudo-range and Doppler positioning method with LEO Satellites‘ signals of opportunity

Satellite Navigation
Low Earth Orbit (LEO) satellites, with their wide coverage and large number, have gradually become a crucial platform and means for navigation and positioning services. Compared to other LEO constellations, Starlink has over 6000 satellites in orbit, and
Ying Xu, Yue Liu, Ming Lei, Ming Gao, Zhibo Fang, Cheng Jiang   +5 more
doaj   +1 more source

A Fast Satellite Selection Algorithm Based on NSWOA for Multi-Constellation LEO Satellite Dynamic Opportunistic Navigation

Applied Sciences
In Global Navigation Satellite System (GNSS)-denied environments, opportunistic positioning using non-cooperative Low Earth Orbit (LEO) satellite signals has shown strong potential.
Chuanjin Dai, Yuqiang Chen, Bo Zang, Lin Li, Liang Zhang, Ke Wang, Meng Wu   +6 more
doaj   +1 more source

OFDM-Based Positioning With Unknown Data Payloads: Bounds and Applications to LEO PNT

IEEE Transactions on Wireless Communications
This paper presents bounds, estimators, and signal design strategies for exploiting both known pilot resources and unknown data payload resources in time-of-arrival (TOA)-based positioning systems with orthogonal frequency-division multiplexing (OFDM) signals.
Andrew M. Graff, Todd E. Humphreys
openaire   +2 more sources

Optimization design of two-layer Walker constellation for LEO navigation augmentation using a dynamic multi-objective differential evolutionary algorithm based on elite guidance. [PDF]

GPS Solut, 2023
Deng Z, Ge W, Yin L, Dai S.
europepmc   +1 more source

Unveiling Starlink for PNT

Navigation
This paper provides a comprehensive theoretical and experimental description of how to exploit Starlink low Earth orbit (LEO) satellites for positioning, navigation, and timing (PNT).
Sharbel Kozhaya, Joe Saroufim, Zaher (Zak) M. Kassas   +2 more
doaj   +1 more source

Survey on Optimization Methods for LEO-Satellite-Based Networks with Applications in Future Autonomous Transportation. [PDF]

Sensors (Basel), 2022
Çelikbilek K, Saleem Z, Morales Ferre R, Praks J, Lohan ES.   +4 more
europepmc   +1 more source

The Severity-Calibrated Aphasia Naming Test. [PDF]

Am J Speech Lang Pathol, 2022
Walker GM, Fridriksson J, Hillis AE, den Ouden DB, Bonilha L, Hickok G.   +5 more
europepmc   +1 more source

Software Defined Radio for GNSS Radio Frequency Interference Localization. [PDF]

Sensors (Basel), 2023
Taylor F, Gattis E, Trapani L, Akos D, Lo S, Walter T, Chen YH.   +6 more
europepmc   +1 more source

Heterogeneity in Meat Food Groups Can Meaningfully Alter Population-Level Intake Estimates of Red Meat and Poultry. [PDF]

Front Nutr, 2021
O'Connor LE, Herrick KA, Parsons R, Reedy J.   +3 more
europepmc   +1 more source