Filters








5,588 Hits in 5.8 sec

Modeling the Effect of Human Body on TOA Based Indoor Human Tracking

Yishuang Geng, Jie He, Kaveh Pahlavan
2013 International Journal of Wireless Information Networks  
In Time-of-Arrival (TOA) based indoor human tracking system, the human body mounted with the target sensor can cause non-line of sight (NLOS) scenario and result in significant ranging error.  ...  In this paper, measurement of TOA ranging error has been conducted in a typical indoor environment and sources of inaccuracy in TOA-based indoor localization have been analyzed.  ...  Yunxing Ye from CWINS, WPI for building the measurement system. The technical discussion with Dr. Yadong Wan from USTB is of great help. This work has been  ... 
doi:10.1007/s10776-013-0227-3 fatcat:ahruddtsxzbbrpvben7tsmppym

Indoor geolocation in the absence of direct path

Kaveh Pahlavan, Ferit Akgul, Mohammad Heidari, Ahmad Hatami, John Elwell, Robert Tingley
2006 IEEE wireless communications  
of two novel approaches to mitigating the large ranging errors caused by UDP conditions.  ...  The first technique exploits nondirect paths for ranging, while the second approach relies on cooperative localization for wireless sensor and ad hoc networks.  ...  Allen Levesque of WPI for his constructive review and comments, and Dr. Donald Gustafson of Draper Laboratory for constructive discussions.  ... 
doi:10.1109/mwc.2006.275198 fatcat:lbclne27wvg3vl7bapofukoife

Accurate indoor localization with zero start-up cost

Swarun Kumar, Stephanie Gil, Dina Katabi, Daniela Rus
2014 Proceedings of the 20th annual international conference on Mobile computing and networking - MobiCom '14  
We present Ubicarse, an accurate indoor localization system for commodity mobile devices, with no specialized infrastructure or fingerprinting.  ...  We implement Ubicarse on a HP SplitX2 tablet and empirically demonstrate a median error of 39 cm in 3-D device localization and 17 cm in object geotagging in complex indoor settings.  ...  We thank members of the MIT Center for Wireless Networks and Mobile Computing: Amazon, Cisco, Google, Intel, Mediatek, Microsoft, ST Microelectronics, and Telefonica for their interest and general support  ... 
doi:10.1145/2639108.2639142 dblp:conf/mobicom/KumarGKR14 fatcat:lwad6cbuurdw3plvc4gzp7x734

Wideband measurements of angle and delay dispersion for outdoor and indoor peer-to-peer radio channels at 1920 MHz

G.D. Durgin, V. Kukshya, T.S. Rappaport
2003 IEEE Transactions on Antennas and Propagation  
(30 beamwidth) antennas to measure both the angles-of-arrival and time-delays of multipath components.  ...  This paper presents spatio-temporal measurements for the peer-to-peer radio channel at a center frequency of 1920 MHz with 140 MHz of radio-frequency bandwidth.  ...  Puckett for their assistance in measured data collection and processing. They also thank Dr. J. Isaacs of ITT Defense and Electronics for his support and encouragement of this work.  ... 
doi:10.1109/tap.2003.811494 fatcat:c4m2abkw7zgurklflouqd4ccii

Identification of the Absence of Direct Path in Indoor Localization Systems

Mohammad Heidari, Ferit Ozan Akgul, Kaveh Pahlavan
2007 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications  
Ultra-wideband (UWB) indoor positioning systems based on Time of Arrival (TOA) techniques are considered to be the high precision alternatives to those employing received signal strength (RSS) or Angle  ...  of Arrival (AOA) due to their superior time-domain resolution.  ...  Traditional metrics for localization applications are Angle of Arrival (AOA), Received Signal Strength (RSS), Time of Arrival (TOA), and Time Difference of Arrival (TDOA).  ... 
doi:10.1109/pimrc.2007.4394450 dblp:conf/pimrc/HeidariAP07 fatcat:qtr2ured5rg37jrfyaajlvh4ji

Adding Angle of Arrival Modality to Basic RSS Location Management Techniques

Eiman Elnahrawy, John Austen-Francisco, Richard Ma
2007 2007 2nd International Symposium on Wireless Pervasive Computing  
In this paper we describe a radio-based localization approach that is based on the use of rotating directional antennas and a Bayesian network that combines both angle-of-arrival (AoA) and Received Signal  ...  Next, using a combination of synthetic and trace-driven experiments, we show the impact of different signal distortions on localization performance.  ...  We showed that AoA does not help much indoors because of fundamental errors in RSS and angle information, but appears to be a viable technique for outdoor localization.  ... 
doi:10.1109/iswpc.2007.342648 fatcat:3o2uqtqul5ggjjgfmyfkfft2ha

A robust positioning architecture for construction resources localization using wireless sensor networks

Meimanat Soleimanifar, Ming Lu, Ioanis Nikolaidis, SangHyun Lee
2011 Proceedings of the 2011 Winter Simulation Conference (WSC)  
Indoor experiments were conducted, revealing that acceptable position estimation with 1-2 m accuracy can be obtained with this flexible sensor network architecture.  ...  This paper introduces a cost-effective and robust positioning architecture that relies on wireless sensor networks (WSNs) for construction resources localization.  ...  ACKNOWLEDGEMENTS The authors would like to acknowledge the work of Dr. Israat T. Haque and Dr. Pawel Gburzynski for the development of the tools and their support for this project.  ... 
doi:10.1109/wsc.2011.6148050 dblp:conf/wsc/SoleimanifarLNL11 fatcat:o4n6sb33xnhddj336bb3v5qkiq

Impact of the dihedral angle of switched beam antennas in indoor positioning based on RSSI

Stefano Maddio, Marco Passafiume, Alessandro Cidronali, Gianfranco Manes
2014 2014 11th European Radar Conference  
In this paper an investigation around the SBA shape is presented, with particular emphasis on the effects of the dihedral angle of regular polyhedron-type SBA.  ...  This paper presents an investigation about Switched Beam Antennas (SBA) for indoor positioning systems based on RSSI measurements.  ...  Fig. 7 : 7 Fig. 7: Distribution of localization error for 4 dihedral angles. Fig. 8 : 8 Fig. 8: Error distribution for the six cases of dihedral angle.  ... 
doi:10.1109/eurad.2014.6991271 fatcat:6usudieperb2fhawygkqd4c23u

Impact of the dihedral angle of Switched Beam Antennas in indoor positioning based on RSSI

Stefano Maddio, Marco Passafiume, Alessandro Cidronali, Gianfranco Manes
2014 2014 44th European Microwave Conference  
In this paper an investigation around the SBA shape is presented, with particular emphasis on the effects of the dihedral angle of regular polyhedron-type SBA.  ...  This paper presents an investigation about Switched Beam Antennas (SBA) for indoor positioning systems based on RSSI measurements.  ...  Fig. 7 : 7 Fig. 7: Distribution of localization error for 4 dihedral angles. Fig. 8 : 8 Fig. 8: Error distribution for the six cases of dihedral angle.  ... 
doi:10.1109/eumc.2014.6986763 fatcat:3gr6aqzqvvewdefhh3pbt4ww24

Avoiding multipath to revive inbuilding WiFi localization

Souvik Sen, Jeongkeun Lee, Kyu-Han Kim, Paul Congdon
2013 Proceeding of the 11th annual international conference on Mobile systems, applications, and services - MobiSys '13  
Despite of several years of innovative research, indoor localization is still not mainstream.  ...  Our main observation is that natural human mobility, when combined with PHY layer information, can help in accurately estimating the angle and distance of a mobile device from an wireless access point  ...  , or crowdsourcing for the purpose of indoor localization.  ... 
doi:10.1145/2462456.2464463 dblp:conf/mobisys/SenLKC13 fatcat:x5ouxih5xbg2zltrbtzucsnnn4

Target Localization with a Single Antenna via Directional Multipath Exploitation

Ali H. Muqaibel, Moeness G. Amin, Fauzia Ahmad
2015 International Journal of Antennas and Propagation  
Target localization in urban sensing can benefit from angle dependency of the pulse shape at a radar receiver antenna.  ...  A single radar unit sensing operation of indoor targets surrounded by interior walls is considered, where interior wall multipaths are exploited to provide target cross-range.  ...  Muqaibel was supported by the Deanship of Scientific Research at King Fahd University of Petroleum and Minerals (KFUPM).  ... 
doi:10.1155/2015/510720 fatcat:qj7graswzvd3lpanvp2jddmtmi

RSSI-based Algorithm for Indoor Localization

Xiuyan Zhu, Yuan Feng
2013 Communications and Network  
Since Indoor localization requests higher accuracy, using GPS or AGPS for indoor localization is not feasible in the current view.  ...  Wireless node localization is one of the key technologies for wireless sensor networks.  ...  Acknowledgements This research is partially supported by National Natural Science Foundation of China under Grant No. 60933011 and 61003238.  ... 
doi:10.4236/cn.2013.52b007 fatcat:aiuqqjfrp5gefnqg2fseo6hesi

A Comparative Performance Evaluation of Indoor Geolocation Technologies

Ahmad HATAMI, Bardia ALAVI, Kaveh PAHLAVAN, Muzaffer KANAAN
2006 Interdisciplinary Information Sciences  
Severe multipath fading in indoor areas, poses a challenging environment for accurate localization. In this article we provide a comprehensive overview of existing indoor localization techniques.  ...  We address the bandwidth requirement, advantages and disadvantages of received-signal-strength (RSS) and time-of-arrival (TOA) based localization algorithms.  ...  Allen Levesque for his constructive review and comments.  ... 
doi:10.4036/iis.2006.133 fatcat:dhbhjgkfnja6zaodcy2cnrsuem

Three-Dimensional Empirical AoA Localization Technique for Indoor Applications

Alma'aitah, Alsaify, Bani-Hani
2019 Sensors  
Consequently, several low-cost localization schemes have been proposed in the literature based on angle of arrival (AoA), time difference of arrival (TDoA), received signal strength indicator (RSSI) or  ...  Based on the performance evaluation, significant location accuracy is achieved by TDEAL; where, for instance, an average error margin of less than 13 cm is achieved using 10 readers in an area of 10 ×  ...  .), such devices, with their typical long lifetime, are ideal for indoor radio frequency (RF) based localization.  ... 
doi:10.3390/s19245544 pmid:31847482 pmcid:PMC6960967 fatcat:bonpdehx6ngbdf25hzahubgwk4

A clustering based channel model for indoor wireless communication

Akshay Kumar, R. Bhattacharjee, Shashank Goel
2011 2011 National Conference on Communications (NCC)  
In this paper, we present a clustering based radio channel model for a wideband frequency selective Single Input Single Output (SISO) indoor wireless channel.  ...  With the transmitter and the receiver located at the foci of an ellipse, the scatterers are modeled to be present in form of clusters of scatterers distributed randomly inside the ellipse.  ...  For beam-forming and emitter localization applications in which an array of sensors is used to receive communication signals, it is necessary to have channel models that provide angle of arrival (AOA)  ... 
doi:10.1109/ncc.2011.5734738 fatcat:y3nv6xkjbvc2nlqrutmxgma6nq
« Previous Showing results 1 — 15 out of 5,588 results