Results 91 to 100 of about 1,168 (189)

Precision dilution in triangulation based mobile robot position estimation

, 2003
. When navigating from landmarks, the numerical computation of the differential behavior of the mapping from measurements to states is well understood.
Alonzo Kelly
core  

Simulation of Virtual MIMO base stations for mobile location in IMT-Advanced networks

, 2012
The conventional Location and Positioning (L&P) methods rely on availability of base station (BS) locations as well as mitigation of propagation effects. It is known that the location estimation accuracy suffers from poor geometric dilution of precision (
M. S. I. M. Zin, G. Markarian, M. S. Mohamad Isa, Markarian, Garik, Z. Zakaria, Awang md isa, Azmi, Zin, M. S. I. M., Zakaria, Z., A. Awang Md Isa, Mohd Zin, Mohd Shahril Izuan, Mohamad Isa, Mohd Sa'ari, Isa, Mohamad, Zakaria, Zahriladha   +12 more
core   +1 more source

Efficient AOA Estimation and NLOS Signal Utilization for LEO Constellation-Based Positioning Using Satellite Ephemeris Information

Applied Sciences
As large-scale low Earth orbit (LEO) constellations continue to expand, the potential of their signal strength for positioning applications should be fully leveraged.
Junqi Guo, Yang Wang
doaj   +1 more source

Formation Configuration Design for Low-Earth Orbit Regional Navigation Satellites

Guidance, Navigation and Control
In the event of a significant natural disaster or a local conflict, the demand for a regional satellite navigation becomes imperative. The navigation can provide accurate position information and navigation augmentation services for regional emergency ...
Jiaqi Fan, Wei Li, Qing Li
doaj   +1 more source

Optimal Neural-Based Navigation Satellite Selection

, 1993
The application of neural-based methods to optimal satellite subset selection for navigation use is discussed. The optimal satellite subset is chosen by minimizing a quantity known as Geometric Dilution of Precision (GDOP), which is given by the trace of
El-Sherief, Hossny, Simon, Daniel J.
core  

Geometry of GPS and GLONASS for different number of operational satellites

, 2000
Nowadays there are two world wide satellite navigation systems - American GPS and Russian GLONASS. Distribution (in per cent) and comparison (in per cent) of GDOP (Geometric Dilution Of Precision) coefficient values for different number of operational ...
Januszewski, J.
core  

Visibility and geometry of GPS and GLONASS

, 1999
Actually there are two world-wide satellite navigation systems - American GPS and Russian GLONASS. Distribution (%) of numbers of visible satellites and distribution (%) of GDOP (Geometric Dilution Of Precision) coefficient values for the observer at ...
Januszewski, J.
core  

Enhanced location and positioning in wimax networks with virtual mimo base station [PDF]

, 2015
Location and Positioning (L&P) techniques which utilize wireless broadband networks are often considered by the wireless communications industries to be a means for improving overall system performance and providing value added services. Conventional L&P
Othman, Muhammad Hakim
core  

Integrating GPS, GLONASS, BeiDou, and Galileo Receivers to Overcome Signal Blocking Challenges [PDF]

Iranian Journal of Electrical and Electronic Engineering
Blocking interference poses significant challenges to the accuracy and reliability of navigation systems by obstructing the communication path. Single-frequency receivers are generally more susceptible to blocking interference due to their limited ...
K. Bahmani, A. Sadr, M. R. Mosavi
doaj  

Wireless Location Tracking Algorithms based on GDOP in the Mobile Environment

, 2011
The thesis is to explore wireless location tracking algorithms based on geometric dilution of precision (GDOP) in the mobile environment. The GDOP can be used as an indication of positioning accuracy, affected by the geometric relationship between the ...
Kuo, Ting-Fu
core