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HSGPS Signal Analysis and Performance under Various Indoor Conditions
2004
Navigation
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The focus of this paper is on improving static-mode HSGPS positioning performance in terms of accuracy and reliability. ...
An XTrac-LP TM HSGPS evaluation kit, developed by SiRF Technologies Inc., is used to investigate some indoor environments by analyzing the fading and pseudorange error conditions. ...
In addition, the authors acknowledge the support of the PLAN group, University of Calgary; the Tampere University of Technology, Finland; and the Nokia Foundation. ...
doi:10.1002/j.2161-4296.2004.tb00339.x
fatcat:d4l2gkanxncxjj6adgavfzhywm
GNSS Indoor Location Technologies
2004
Journal of Global Positioning Systems
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This paper presents an overview of GNSSbased indoor location technologies. Current and emerging users and their potential requirements are first discussed. ...
The possibility of using a GNSS hardware simulator to create reproducible indoor environments in order to overcome the controllability issue encountered with real environments is analysed. ...
Acknowledgements The assistance of the following researchers in the PLAN Group, Department of Geomatics Engineering, the University of Calgary, are acknowledged: Drs. C. Ma and M. ...
doi:10.5081/jgps.3.1.2
fatcat:zlegxxrlqrcx7gc5p6olljzcbm
Comparing detection performance of polarization and spatial diversity for indoor GNSS applications
2010
IEEE/ION Position, Location and Navigation Symposium
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Theoretical comparison of these antenna diversity structures is investigated along with real GPS signal collection in different indoor locations to evaluate their performance experimentally. ...
Herein, the polarization diversity is formed using two different combinations of orthogonal polarized antennas: one with Right Hand Circular Polarized (RHCP) and Left Hand Circular Polarized (LHCP) antennas ...
Reference [7] has recently proposed a new spatial diversity structure based on the synthetic array concept to enhance the detectability of GPS signal in indoor locations. ...
doi:10.1109/plans.2010.5507259
fatcat:cbqwpgj5nfd6tcocbqq3q4lhva
Investigating GPS Signals Indoors with Extreme High-Sensitivity Detection Techniques
2005
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The technique is used to evaluate signal characteristics in a pair of datasets gathered indoors, with carrier-to-noise density ratios as much as 40 dB or more below nominal open-sky signals. ...
In addition, the high-sensitivity techniques based on precise tracking loop control demonstrate the potential for improved high-sensitivity GPS-based technologies using ultra-tight integration with additional ...
This work was conducted as part of a cooperative research project between Nokia Corporation and the University of Calgary Position, Location, and Navigation (PLAN) group. ...
doi:10.1002/j.2161-4296.2005.tb00363.x
fatcat:bqbybyktsna3lnqwfgrtwfsmoi
Detection Performance of Polarization and Spatial Diversities for Indoor GNSS Applications
2012
International Journal of Antennas and Propagation
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Performance enhancements are quantified from a theoretical perspective and later verified based on several test measurements in various indoor environments. ...
In addition, the processing gain is quantified and the performance of each individual diversity system is evaluated. ...
The spatial diversity main principle is based on the fact that in dense multipath environments the received signals are a random function of antenna location. ...
doi:10.1155/2012/879142
fatcat:u5w5ft3aqngxfk4xnijbi2mmna
Development of a wearable global positioning system for place and health research
2008
International Journal of Health Geographics
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This study focuses on the design of a wearable global positioning system (GPS) data logger for the purpose of objectively measuring the temporal and spatial features of human activities. ...
Results: We designed and tested a lightweight, wearable GPS receiver, capable of logging location information for up to 70 hours continuously before recharging. ...
at the University of Ottawa. ...
doi:10.1186/1476-072x-7-59
pmid:19032783
pmcid:PMC2613379
fatcat:dnlikppltbgg7h5szwmivawfiy
High-Sensitivity GNSS Doppler and Velocity Estimation for Indoor Navigation
[article]
2013
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Finally, the benefits of using such Doppler measurements for consistent navigation are evaluated in two real indoor environments. ...
Thus maintaining track of Doppler frequency with acceptable accuracy in challenged indoor environments is important and will be beneficial for both standalone and integrated solutions. ...
Chapter 4 focuses on characterization of Doppler errors based on real indoor observations from HSGNSS receivers. An indoor signal/multipath model is developed. ...
doi:10.11575/prism/26368
fatcat:o75vpmkg7jchnnlyhpu4ou3bam
Algorithms for map-aided autonomous indoor pedestrian positioning and navigation
2007
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I would like to thank the numerous professors and collaborators of the EPFL for their help and discussions on various thematic. ...
The second algorithm for continuous localization is based on Bayesian inference. For the first time it applies a statistical approach to personal localization using only inertial measurements. ...
Based on a combination of different positioning techniques they give sufficient accuracy.In 2004 Lachapelle presents a method based on HSGPS technology. ...
doi:10.5075/epfl-thesis-3961
fatcat:hk7tdtmgi5hmtdxqrdpo5cjzs4
iCORE Research Report: Volume 3
[article]
2005
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This report outlines activities and achievements of the iCORE research teams, which have been established in collaboration with Alberta universities and companies. ...
NSERC Project SimQuali We have started to discuss general strategy and details of Intellectual Property. This is based on the existing IP policies of the involved parties (U of C, Brycol, and CSER). ...
ALBERTA INGENUITY CENTRE FOR MACHINE LEARNING (AICML) This research centre was formed two years ago, with Jonathan Schaeffer as one of the co-principal investigators. ...
doi:10.11575/prism/10592
fatcat:byiphq4djfb3pomvcksjyfjb7q
Hybridation MEMS/UWB pour la navigation pédestre intra-muros
2009
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The benefit of the MEMS/UWB hybridization filters are evaluated based on this experiment. ...
Abstract Facing the expansion of geolocation needs, illustrated by the GALILEO European project, the growth of Location Based Services (LBS) and the need to identify the location of emergency mobile phone ...
The recent success of AGPS must not hide these technical issues, particularly in terms of availability in urban environments and indoor ones . ...
doi:10.5075/epfl-thesis-4429
fatcat:v3d2wjhdtnavxdd4cqnb76uuym
Human healthscapes as an approach to measuring context in research on place and health
2013
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Specifically, the contextual impact on health status reflects not only the person's immediate neighbourhood, but also locations where other activities of daily life occur. ...
Furthermore, the influence of context on health presumably depends a great deal on the amount of time spent in each space, and the potential for misclassifying context is greater for individuals whose ...
The availability of high-sensitivity GPS (HSGPS) and assisted GPS (AGPS) will help to improve indoor positioning performance [74] ; however, even under ideal indoor conditions, signal accuracy is limited ...
doi:10.20381/ruor-13177
fatcat:o76uiq7rvngg5pwou3emytqofe
Tightly coupled MEMS INS/GPS integration with INS aided receiver tracking loops
[article]
2017
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Based on an analysis of the conventional carrier tracking loop, carrier tracking capability is enhanced by using INS Doppler aiding. ...
This dissertation focuses on the performance enhancement of MEMS INS/GPS integrated navigation systems in signal-attenuated environments. ...
In order to meet the requirements for weak signal positioning in E911, high sensitivity GPS (HSGPS), assisted GPS (AGPS), and cellular network-based solutions which use cellular phone signals, have been ...
doi:10.11575/prism/2130
fatcat:mt5tb2epajf6dbcfricsuzh7dy