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Topic Area: Wireless
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Displaying records 41 to 50 of 95 records.
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41. Impacts of 2.4 GHz ISM Band Interference on IEEE 802.15.4 Wireless Sensor Network Reliability in Buildings
Topic: Wireless
Published: 9/9/2012
Authors: Wenqi Guo, William M Healy, Mengchu Zhou
Abstract: With the recent emergence of standards, wireless solutions are ready to be deployed in building automation networks. IEEE 802.15.4 is a standard for short range wireless networks. Its major applications fields are home and building automation, as wel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906735

42. 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

43. Information Efficiency of Multihop Packet Radio Networks and Channel-Adaptive Routing
Topic: Wireless
Published: 1/1/2005
Authors: Michael R Souryal, B R Vojcic, R L Pickholtz
Abstract: We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all ha ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150126

44. Interference Avoidance in Rapidly Deployed Wireless Ad hoc Incident Area Networks
Topic: Wireless
Published: 4/18/2008
Authors: Mohamed T. Refaei, Nader Moayeri, Michael R Souryal
Abstract: A common strategy for responding to indoor emergency scenarios is to rapidly deploy a group of first responders inside the incident area and an incident command center outside of the incident area. First responders are equipped with radios that allow ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152104

45. Interference Tests for 900 MHz Frequency-Hopping Public-Safety Wireless Devices
Topic: Wireless
Published: 8/15/2011
Authors: Catherine A Remley, Michael R Souryal, William F Young, Daniel G. Kuester, David R Novotny, Jeffrey R Guerrieri
Abstract: We discuss free-field measurement methods designed to quantify interference between wireless devices such as RF identification systems and RF-based emergency beacons used by fire fighters. For public safety applications, standardized testing is impor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907716

46. Joint Rate Adaptation and Channel-Adaptive Relaying in 802.11 Ad Hoc Networks
Topic: Wireless
Published: 1/1/2006
Authors: Michael R Souryal, Nader Moayeri
Abstract: Channel-adaptive relaying has recently been proposed as a means to exploit spatial and temporal diversity in multihop ad hoc networks with fading. In conjunction with appropriate routing protocols, adaptive relaying enables each forwarding node in a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50852

47. Link Assessment in an Indoor 802.11 Network
Topic: Wireless
Published: 4/1/2006
Authors: Michael R Souryal, Luke Klein-Berndt, Leonard E. Miller, Nader Moayeri
Abstract: This paper presents the empirical results and analysis of a link variability study for an indoor, stationary 802.11 network subject to external interference. The objective is to characterize the relationships between the packet loss rate on a link an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150597

48. Low probability of detection underwater acoustic communications using direct-sequence spread-spectrum
Topic: Wireless
Published: 12/1/2008
Authors: Wen-Bin Yang, T.C. Yang
Abstract: Direct-sequence spread-spectrum underwater acoustic communications are analyzed in this paper between communication nodes, at least one of which is moving. At-sea data are analyzed which show that the phase change due to source motion is significant. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152173

49. 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

50. Measurement Bandwidth Extension Using Multisine Signals: Propagation of Error
Topic: Wireless
Published: 2/6/2010
Authors: Catherine A Remley, Dominique Schreurs, M. Myslinski, Dylan F Williams
Abstract: We describe a post-processing technique that can extend the effective measurement bandwidth of narrowband vector receivers by phase aligning overlapping measurements. The method requires only knowledge of the desired phases of a periodic, multisine e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901524



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