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Topic Area: Wireless
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Displaying records 61 to 70 of 95 records.
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61. Practical Applications of Nonlinear Measurements
Topic: Wireless
Published: 6/12/2009
Author: Catherine A Remley
Abstract: We discuss the limitations of vector network analyzers in the measurement of nonlinear devices and circuits, including their inability to measure the relative phase between frequency components and the actual impedance in which a device is embedded. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902249

62. Measurements in Harsh RF Propagation Environments to Support Performance Evaluation of Wireless Sensor Networks
Topic: Wireless
Published: 6/5/2009
Authors: Catherine A Remley, Galen H Koepke, Christopher L Holloway, Dennis G. Camell, Chriss A. Grosvenor
Abstract: We describe common performance evaluation methods for wireless devices, including wireless sensors, and how measurements of real-world propagation environments are used to support the evaluation process. We then present representative measurement dat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901417

63. Comparison of QPSK and 64QAM EVM for an OFDM WLAN Signal at 2.4 GHz and 4.9 GHz in a Multipath Environment
Topic: Wireless
Published: 6/1/2009
Authors: Catherine A Remley, Michael McKinley, J. S. Kenney, M. Myslinski, Galen H Koepke, Dennis G. Camell, Robert Johnk
Abstract: In this work, we verify experimentally the consistency of EVM across modulation types of orthogonal frequency-division multiplexed (OFDM) signals in two dedicated lab setups. We compared EVMs obtained for different modulation types both in an idealiz ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901362

64. Electromagnetic Measurements for Counterfeit Detection of Radio-Frequency Identification Cards
Topic: Wireless
Published: 5/2/2009
Authors: Henry Romero, Catherine A Remley, Dylan F Williams, Chih-Ming Wang
Abstract: We investigate a technique for counterfeit detection of radio-frequency identification cards based on the electromagnetic characteristics of the cards rather than the digital information that they transmit. We describe a method of measuring the elect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33134

65. The IMS 2009 "Bonus Issue"
Topic: Wireless
Published: 5/1/2009
Author: Catherine A Remley
Abstract: This is an Editorial for a special issue of IEEE Microwave Magazine devoted to the International Microwave Symposium. Kate Remley, the Editor-in-Chief, and two co-editors write about this issue.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901704

66. Editorial for the February, 2009 issue of IEEE Microwave Magazine
Topic: Wireless
Published: 2/2/2009
Author: Catherine A Remley
Abstract: An editorial for the February 2009 issue of IEEE Microwave Magazine by Kate Remey, the Editor in Chief.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33214

67. Radio Frequency and Analog/Mixed-Signal (RF and AMS) Technologies for Wireless Communications
Topic: Wireless
Published: 1/5/2009
Authors: Herbert S Bennett, Margaret Huang, John J. Pekarik
Abstract: The challenges facing the RF and AMS community as represented by the International Technology Roadmap for Semiconductors are summarized in this paper.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900886

68. 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

69. Diversity Performance of a Practical Non-Coherent Detect-and-Forward Receiver
Topic: Wireless
Published: 11/30/2008
Authors: Michael R Souryal, Huiqing You
Abstract: We propose a non-coherent receiver for the fixed detect-and-forward relay channel and derive a closed-form tight upper bound on its bit error probability in Rayleigh fading channels. Using this upper bound, we show that the receiver achieves nearly ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152160

70. Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver
Topic: Wireless
Published: 11/30/2008
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 for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152159



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