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Displaying records 51 to 60 of 93 records.
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51. Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver
Topic: Telcommunications/Wireless
Published: 7/30/2010
Author: Michael R Souryal
Abstract: This paper proposes a simple non-coherent amplify-and-forward receiver for the relay channel and evaluates its diversity performance for Rayleigh fading channels. We use the generalized likelihood ratio test to obtain the decision rule in closed form ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905550

52. O2 A-band line parameters to support atmospheric remote sensing. Part II: The rare isotopologues
Topic: Telcommunications/Wireless
Published: 7/21/2011
Authors: Joseph Terence Hodges, David A Long, Daniel K Havey, S. S. Yu, M Okumura, Charles E Miller
Abstract: Frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) was employed to measure over 100 transitions in the R-branch of the b1Σg+←X3Σg-(0,0) band for the rare O2 isotopologues. The use of 17O- and 18O-enriched mixtures allowed fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907932

53. On The Security Performance of Physical-Layer Network Coding
Topic: Telcommunications/Wireless
Published: 1/5/2009
Authors: Yi Qian, Kejie Lu, Shengli Fu, Tao Zhang
Abstract: Physical-layer network coding (PLNC) is a novel wireless communication technology, in which multiple transmitters can send signals on the same channel to the same receiver at the same time. Our previous studies have revealed that PLNC can substantial ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900947

54. On the Delay and Data Rate Performance of Throughput-Efficient Multi-Channel Access Algorithms in Cognitive Radio Networks
Topic: Telcommunications/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

55. Optimizing Authentication in Media Independent Handovers using IEEE 802.21
Topic: Telcommunications/Wireless
Published: 8/6/2009
Authors: Antonio Izquierdo Manzanares, Nada T Golmie, Richard Antoine Rouil
Abstract: In this paper we study the performance of the authentication process in media independent handovers, and consider the impact of using IEEE 802.21 link triggers to achieve seamless mobility. We describe all interactions between the 802.21 services and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890070

56. PBX Vulnerability Analysis: Finding Holes in Your PBX Before Someone Else Does
Series: Special Publication (NIST SP)
Report Number: 800-24
Topic: Telcommunications/Wireless
Published: 4/1/2001
Author: David R Kuhn
Abstract: This report presents a generic methodology for conducting an analysis of a Private Branch Exchange (PBX) in order to identify security vulnerabilities. The report focuses on digital-based PBXs and addresses the following areas for study: System Arc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151223

57. Performance Evaluation of a Secure Mac Protocol for Vehicular Networks
Topic: Telcommunications/Wireless
Published: 11/17/2008
Authors: Yi Qian, Kejie Lu, Nader Moayeri
Abstract: The main benefit of vehicular communication is seen in active safety systems that increase passenger safety by exchanging warning messages between vehicles. Other applications and private services are also permitted in order to lower the cost and to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900128

58. Performance Metrics for IEEE 802.21 Media Independent Handover (MIH) Signaling
Topic: Telcommunications/Wireless
Published: 3/2/2009
Authors: David Wesley Griffith, Richard Antoine Rouil, Nada T Golmie
Abstract: The IEEE 802.21 Media Independent Handover (MIH) working group is developing a set of mechanisms to facilitate migration of mobile users between access networks that use different link-layer technologies. Among these are mobility managers that create ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51260

59. Performance of Amplify-and-Forward and Decode-and-Forward Relaying in Rayleigh Fading With Turbo Codes
Topic: Telcommunications/Wireless
Published: 5/1/2006
Authors: Michael R Souryal, B R Vojcic
Abstract: Cooperative transmission, in which a source and relay cooperate to send a message to a destination, can provide spatial diversity against fading in wireless networks. We derive analytical expressions for the error probability of amplify-and-forward ( ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151153

60. Policy-based Scanning with QoS Support for Seamless Handovers in Wireless Networks
Topic: Telcommunications/Wireless
Published: 4/28/2009
Author: Nada T Golmie
Abstract: Supporting seamless handovers between different wireless networks is a challenging issue. One of the most important aspects of a seamless handover is finding a target network and point of attachment (PoA). This is achieved by performing a so-called c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901702



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