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Displaying records 11 to 20 of 98 records.
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11. Influence on Q-Factor of Proximity and Orientation with Respect to Large-Form-Factor Loads in a Reverberation Chamber
Topic: Wireless
Published: 8/13/2013
Authors: Willem Burger, Christopher L Holloway, Catherine A Remley
Abstract: In this paper, it is shown that the presence of largeform-factor loads in close proximity to an antenna under test can affect the measured Q-factor (if measured improperly) in a reverberation chamber, possibly influencing the results of further calcu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913687

12. Evaluating Feedback Systems for Residential Building Energy Monitoring
Topic: Wireless
Published: 8/10/2013
Authors: Wenqi Guo, Tania Ullah, MengChu Zhou
Abstract: Rising global energy demand, increasing electricity prices, and the limitation of natural resources have led to increased interest in energy monitoring of residential buildings. Much research has been done to examine the effect of energy use feedback ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913721

13. Proximity and Antenna Orientation Effects for Large-Form-Factor Devices in a Reverberation Chamber
Topic: Wireless
Published: 8/8/2013
Authors: Willem Burger, Catherine A Remley, Christopher L Holloway, John M Ladbury
Abstract: Recent research has shown that large-form-factor devices can affect radiated power measurements in a reverberation chamber due to absorbtion and physical blocking by lossy material present in the device. In this paper, these effects are explained and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913330

14. On the Delay and Data Rate Performance of Throughput-Efficient Multi-Channel Access Algorithms in Cognitive Radio Networks
Topic: Wireless
Published: 7/8/2013
Authors: Kamran Sayrafian, Luca Zappaterra, Hyeong-Ah Choi, Jari Iinatti
Abstract: Cognitive Radio Networks (CRNs) are designed to increase spectrum utilization by allowing unlicensed secondary users (SUs) to operate over existing wireless channels where primary users (PUs) have license to transmit. An SU searches for channels not ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913813

15. Distributed Coverage Optimization in a Network of Static and Mobile Sensors
Topic: Wireless
Published: 6/17/2013
Authors: Kamran Sayrafian, Hamid Mahboubi, Jalal Habibi, Amir Aghdam
Abstract: This paper proposes efficient schemes to increase sensing coverage in a network composed of both mobile and static sensors. The proposed deployment techniques properly assign a virtual weight to every point in the sensing field, based on the infor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913312

16. A Precision Millimeter-Wave Modulated-Signal Source
Topic: Wireless
Published: 6/6/2013
Authors: Catherine A Remley, Paul D Hale, Dylan F Williams, Chih-Ming Wang
Abstract: We develop and characterize a modulated-signal source for use at millimeter-wave frequencies. Components within the source are phase locked by a 10 GHz reference source to minimize drift and improve synchronization. The complex frequency response of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912855

17. MIMO Capacity in 2-D and 3-D Isotropic Environments
Topic: Wireless
Published: 5/21/2013
Authors: Ryan J. Pirkl, Catherine A Remley
Abstract: We analyze the distribution of MIMO channel capacity for different antennas in 2-D and 3-D statistically isotropic environments. These represent possible test environments that may be generated by multi-probe anechoic and reverberation chambers, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910357

18. Cooperative Diversity Routing and Transmission for Wireless Sensor Networks
Topic: Wireless
Published: 4/12/2013
Author: Hamid Gharavi
Abstract: In this paper, we present a novel design framework aimed at developing ‰cooperative diversity‰ in 802.11-based wireless sensor networks. The proposed scheme is a combination of a time-reversed Space-Time Block Code (TR STBC) scheme at the physical la ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913802

19. Experimental Study of the Thermal Impacts on Wireless Sensor Batteries
Topic: Wireless
Published: 4/10/2013
Authors: Wenqi Guo, William M Healy, Mengchu Zhou
Abstract: Wireless sensor networks are being considered for application within buildings to control various equipment in different working environments. As wireless sensors are powered by commercially available batteries, battery performance will directly affe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913358

20. Dynamic Key Refreshment for Smart Grid Mesh Network Security
Topic: Wireless
Published: 2/24/2013
Author: Hamid Gharavi
Abstract: This paper presents a dynamically updating key distribution strategy to enhance mesh network security against cyber attacks. The scheme has been applied to two security protocols known as Simultaneous Authentication of Equals (SAE) and Efficient Mesh ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912924



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