8,614 Hits in 4.3 sec

Orientation Estimation using Wireless Device Radiation Patterns [article]

Thomas Burton, Kasper Rasmussen
2022 arXiv   pre-print
Wireless devices inherently have a non-uniform distribution of energy from their antenna or antennas. The shape that this forms is commonly called a radiation pattern or antenna pattern.  ...  We demonstrate that orientation can be estimated without the cooperation of the target device despite only having a small number of RSS measurements per packet.  ...  We propose using radiation patterns to estimate the orientation of a device remotely and non-cooperatively and classify orientation values as outliers if they show unrealistic changes in orientation.  ... 
arXiv:2203.10052v1 fatcat:o5dc4c6exndmlk7fjgn2m7e57u

Orientation-awareness and wireless systems

D. Tunon, J.-F. Chamberland, G. H. Huff
2015 2015 Information Theory and Applications Workshop (ITA)  
Indeed, orientation information combined with the asymmetry of antenna radiation patterns can lead to substantial performance gains in localization algorithms.  ...  This work explores the potential benefits of orientation awareness in wireless systems in the context of source localization.  ...  As a result, the radiation patterns of mobile devices are frequently asymmetrical.  ... 
doi:10.1109/ita.2015.7308993 dblp:conf/ita/TunonCH15 fatcat:ertui5tsi5htlhuu6gmyhj6qni

Approach to Sensor Node Calibration for Efficient Localisation in Wireless Sensor Networks in Realistic Scenarios

Martin K. Mwila, Karim Djouani, Anish Kurien
2014 Procedia Computer Science  
Non-linearities in RSSI circuits, the antenna radiation pattern and path loss model parameter estimation may result in accuracy of the localisation algorithm.  ...  Localisation or position determination is one of the most important applications for the wireless sensor networks.  ...  In the proposed algorithm, orientation data, accelerometer data as well as the RSS data, coupled with the antennae radiation patterns are used to provide an initial estimate from which the final position  ... 
doi:10.1016/j.procs.2014.05.411 fatcat:tilduaeznbfhzpb4cneqa42oma

Identification of Patch Phase Array Antenna at 28GHz in Different Orientation for 5th Generation Wireless Application

Simpal Kumari, Deepak Kumar Barik, Satyasis Mishra
2017 Circulation in Computer Science  
The parameter presented , ,radiation pattern ,gain, directivity after simulation using HFSS software.  ...  With different orientation the excitation are changed to study the radiation pattern of each patch array antenna.  ...  At different excitation phase a simulated far-field radiation pattern are shown in Fig. 4 The radiation pattern of all three designed antennas have been shown.  ... 
doi:10.22632/ccs-2017-mcsp031 fatcat:akomiiqcbfgghekfrmxpuhm25y

Optimizing transmission cycle for energy efficiency of body worn gateway node

Jaspal Singh, R. K. Sharma, A.K. Gupta
2016 2016 5th International Conference on Wireless Networks and Embedded Systems (WECON)  
frequency of the wireless communications link.  ...  This paper describes the technical tradeoffs that should be considered for the design of an on-body wireless link for physiological monitoring in an indoor environment.  ...  In addition to the wireless projects that are the primary concentration of this paper, a significant amount of work preceded the wireless tasks, specifically the development of the (non-wireless) biomedical  ... 
doi:10.1109/wecon.2016.7993432 fatcat:zz6np7t7lnfd3csod5vbiojqui

Characterizing the RF performance of the eZ430-Chronos wrist watch

Francisco J. Mora-Becerra, Pedro Sathler, Jay D. Carlson, Eric T. Psota, Lance C. Perez
2014 IEEE International Conference on Electro/Information Technology  
The RF performance of the Chronos watch is compared with an Angelos Ambient wireless mote that uses a common type of ceramic chip antenna.  ...  The Texas Instruments eZ430-Chronos development kit is a popular wireless platform for researchers, commercial developers, and hobbyists.  ...  ACKNOWLEDGMENT We would like to thank the Nebraska Center For Excellence in Electronics for allowing us to use their facilities and equipment for testing.  ... 
doi:10.1109/eit.2014.6871797 dblp:conf/eit/Mora-BecerraSCPP14 fatcat:6jt3mfsa6refvck7mavhpblvge

Electromagnetic radiation from ingested sources in the human intestine between 150 MHz and 1.2 GHz

L.C. Chirwa, P.A. Hammond, S. Roy, D.R.S. Cumming
2003 IEEE Transactions on Biomedical Engineering  
As a result, there is considerable ongoing work in developing wireless sensors that can be used in the small intestine.  ...  In addition, the compact antennas used are electrically small, making them inefficient radiators.  ...  An accurate estimate of radiation characteristics is important in wireless telemetry systems especially in this case where the radiation efficiency and source power are very low and the radiation characteristics  ... 
doi:10.1109/tbme.2003.809474 pmid:12723060 fatcat:4odacduutbb27dc2e26cprxdru

Design of a networked robotic system capable of enhancing wireless communication capabilities

Byung-Cheol Min, Eric T. Matson, Bakytgul Khaday
2013 2013 IEEE International Symposium on Safety, Security, and Rescue Robotics (SSRR)  
In addition, we use network devices such as access points (AP), and network switches to create broadband networks between the robot and the command center.  ...  capabilities with off-the-shelf network devices.  ...  In this paper, we examine the directionality of the radiation pattern with a stand-alone directional antenna for DOA estimation.  ... 
doi:10.1109/ssrr.2013.6719347 dblp:conf/ssrr/MinMK13 fatcat:sjgmxfztkfcrtb7busanu3w3wy

Electromagnetic Characterization of UHF-RFID Fixed Reader in Healthcare Centers Related to the Personal and Labor Health

Victoria Ramos, Oscar Javier Suarez, Victor M. Febles Santana, David Samuel Suarez Rodriguez, Erik Aguirre, Silvia De Miguel-Bilbao, Pablo Marina, Luis Enrique Rabassa Lopez-Calleja, Mikel Celaya-Echarri, Francisco Falcone, Jose Angel Hernandez-Armas
2022 IEEE Access  
Hospitals and healthcare centers are experiencing a remarkable implementation of new systems based on wireless communications technologies.  ...  In all cases, insufficient electromagnetic immunity of electronic devices (including AIMD and other medical devices) should be considered and the electromagnetic hazards may be limited also by relevant  ...  However, to obtain insight on the potential impact of different wireless devices and their integration as complete systems requires the use of theoretical estimations.  ... 
doi:10.1109/access.2022.3156477 fatcat:xv4a32udbrchxn6uydiqdyirsq

In-the-Ear Circular-Shaped Balanced Inverted-A Antenna for Hearing Instruments

Nikolaj P. B. Kammersgaard, Sren H. Kvist, Jesper Thaysen, Kaj B. Jakobsen
2016 IEEE Antennas and Wireless Propagation Letters  
The radiation pattern of the antenna is analyzed and the implications of the radiation pattern on the ear-to-ear communication are discussed.  ...  The antenna consists of a bent dipole with a shorting pin used for impedance matching. It is self-resonant and well matched in the entire ISM band from 2.40 GHz to 2.48 GHz.  ...  In [11] an on-body radiation pattern is introduced and used to estimate the magnitude of the creeping wave launched in different directions.  ... 
doi:10.1109/lawp.2016.2538966 fatcat:n54ja5v775ecrebp2ppdweohuy

Human-Induced Effects on RSS Ranging Measurements for Cooperative Positioning

Francescantonio Della Rosa, Mauro Pelosi, Jari Nurmi
2012 International Journal of Navigation and Observation  
Analysis of the errors introduced in the distance estimation using path-loss-based methods has been carried out.  ...  the best of our knowledge, this work is the first attempt to gain insight and understand the impact of both body loss and hand grip on the RSS for enhancing proximity measurements among neighbouring devices  ...  When a standard wireless device rotates around a blocking object such as the user's body, its radiation pattern is affected in such a way to emulate the behavior of a directional antenna.  ... 
doi:10.1155/2012/959140 fatcat:gdpdjrejhnf3tadbktcglpn7iu

Antennas and photovoltaic panels: Toward a green Internet of Things

R. Caso, R. Garroppo, S. Giordano, G. Manara, A. Michel, P. Nepa, L. Tavanti, M. Magnarosa, G. Nenna
2015 2015 IEEE 2nd World Forum on Internet of Things (WF-IoT)  
In particular, solar energy is one of the most promising renewable powers, and it is widely used in autonomous wireless communication systems.  ...  The perspective of a wide use of green power motivates the scientific community to study the possibility of fabricating integrated stand-alone devices.  ...  Fig. 6 6 Normalized radiation pattern of the 3x1 array of antennas for WiFi applications. .  ... 
doi:10.1109/wf-iot.2015.7389039 dblp:conf/wf-iot/CasoGGMMNTMN15 fatcat:wc7ybnfknvfwdbm4z4r2eslt4e

A joint Computer Vision and Reconfigurable Intelligent Meta-surface Approach for Interference Reduction in Beyond 5G Networks

Valeria Loscri, Anna Maria Vegni, Eros Innocenti, Romeo Giuliano, Franco Mazzenga
2021 2021 IEEE 22nd International Conference on High Performance Switching and Routing (HPSR)  
This synergistic approach is used to correctly identify the specific configuration of a radiation pattern, to be used as input for computing optimal coding sequences of the RIM.  ...  Reconfigurable Intelligent Meta-surfaces (RIMs) are particular devices able to control and manipulate radio frequency wireless signals.  ...  In practice, the information gathered with the graph are used to infer the correct radiation pattern, in terms of specific parameters, such as the orientation of the main beam and its width.  ... 
doi:10.1109/hpsr52026.2021.9481794 fatcat:kvaltghzwjdvdfhf7aiz3a5tfe

A Review of Antennas for Indoor Positioning Systems

Luis Brás, Nuno Borges Carvalho, Pedro Pinho, Lukasz Kulas, Krzysztof Nyka
2012 International Journal of Antennas and Propagation  
This paper intends to provide a useful guide for antenna designers who are interested in developing suitable antennas for indoor localization systems.  ...  Antennas with omnidirectional radiation pattern lead to smaller RSSI variances than directional antennas over the entire radiation pattern making its use preferable for fingerprinting.  ...  Mechanical rotation of a directive antenna can also be performed to control the radiation beam, and like this, be used for DoA estimation.  ... 
doi:10.1155/2012/953269 fatcat:nsoup6r7pjherfdg6c6qejrzpa

Evaluation of Diversity Antenna Designs Using Ray Tracing, Measured Radiation Patterns, and MIMO Channel Measurements

Arindam Pal, Chris Williams, Geoff Hilton, Mark Beach
2007 EURASIP Journal on Wireless Communications and Networking  
A channel model which employs the plane-wave approximation was used to combine the embedded antenna radiation patterns of the candidate devices obtained from far-field pattern measurements and multipath  ...  The 4-element candidate arrays were each constructed using a different type of antenna element, and despite the diverse element directivities, pattern characteristics, and polarization purities, all three  ...  Andy Nix for their support in the use of the ray-tracing software, and Phill Rogers for his contribution to the development of the slot multielement PDA.  ... 
doi:10.1155/2007/58769 fatcat:3sk4mxiyizahvi3xbimw4cuxqu
« Previous Showing results 1 — 15 out of 8,614 results