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Topic Area: Wireless

Displaying records 71 to 80 of 95 records.
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71. Wireless Communications in Tunnels for Urban Search and Rescue Robots
Topic: Wireless
Published: 8/18/2008
Authors: Catherine A Remley, George Hough, Galen H Koepke, Dennis G. Camell, Robert Johnk, Chriss A. Grosvenor
Abstract: We report on propagation tests carried out in a subterranean tunnel to support improved wireless communications for urban search and rescue robots. We describe single-frequency and ultrawideband channel-characterization tests that we conducted, as we ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33042

72. Radio Propagation Measurements Before, During, and After the Collapse of Three Large Building Structures
Topic: Wireless
Published: 8/7/2008
Authors: Christopher L Holloway, Galen H Koepke, Dennis G. Camell, Catherine A Remley
Abstract: We are investigating various schemes for detecting first responders and civilians with portable radios or cell phones who are trapped in voids in a collapsed or partially collapsed building. The first part of this effort is to understand propagation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32926

73. Attenuation, Coupling, and Variability of Radio Wave Signals Into and Throughout Twelve Large Building Structures
Series: Technical Note (NIST TN)
Report Number: 1545
Topic: Wireless
Published: 8/1/2008
Authors: Christopher L Holloway, William F Young, Galen H Koepke, Catherine A Remley, Dennis G. Camell, Yann Becquet
Abstract: In this report, we investigate radio communication problems faced by emergency responders (firefighters, police and emergency medical personnel) in disaster situations. A fundamental challenge to communications into and out of large buildings is the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32854

74. Guide to Securing Legacy IEEE 802.11 Wireless Networks
Series: Special Publication (NIST SP)
Report Number: 800-48 Rev 1
Topic: Wireless
Published: 7/25/2008
Authors: Karen Ann Scarfone, Derrick Dicoi, Matt Sexton, Cyrus Tibbs
Abstract: The purpose of this document is to provide guidance to organizations in securing their legacy Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area networks (WLAN) that cannot use IEEE 802.11i. The document provides an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890006

75. Editorial: Microwave Measurements Come to the Fore
Topic: Wireless
Published: 6/2/2008
Authors: Catherine A Remley, Charles Wilker
Abstract: - no abstract, this is an editorial.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32902

76. 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

77. Quantize-and-Forward Relaying with M-ary Phase Shift Keying
Topic: Wireless
Published: 3/31/2008
Authors: Michael R Souryal, Huiqing You
Abstract: Using cooperative transmission, two or more single-antenna users can share their antennas to achieve spatial diversity in a slow fading channel. One relaying protocol that achieves diversity, amplify-and-forward (AF), is striking in its simplicity, b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51311

78. Characterization of a 50 GHz Comb Generator
Topic: Wireless
Published: 2/1/2008
Authors: Howard C. Reader, Dylan F Williams, Paul D Hale, Tracy S. Clement
Abstract: We characterize a 50 GHz comb generator measured on a sampling oscilloscope. With careful control of the input power, input harmonics and comb generator temperature, we find the output spectrum to be stable to 0.1 dB and 0.5 degrees. We correct resul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32685

79. Soft-Decision Metrics for Coded Orthogonal Signaling in Symmetric Alpha-Stable Noise
Topic: Wireless
Published: 1/1/2008
Authors: Michael R Souryal, E G Larsson, B M Peric, B R Vojcic
Abstract: This paper derives new soft decision metrics for coded orthogonal signaling in impulsive noise, more specifically symmetric alpha-stable noise. For the case of a known channel amplitude and known noise dispersion, exact metrics are derived both for C ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51185

80. Real-Time Deployment of Multihop Relays for Range Extension
Topic: Wireless
Published: 6/11/2007
Authors: Michael R Souryal, Johannes Geissbuehler, Leonard E. Miller, Nader Moayeri
Abstract: When the range of single-hop wireless communication is limited by distance or harsh radio propagation conditions, relays can be used to extend the communication range through multihop relaying. This paper targets the need in certain scenarios for rap ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51163



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