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Topic Area: Wireless
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Displaying records 21 to 30 of 96 records.
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21. 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

22. 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

23. 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

24. Correlation Coefficient and Loading Effects for MIMO Antennas in a Reverberation Chamber
Topic: Wireless
Published: 8/13/2013
Authors: Nick Janssen, Catherine A Remley, Christopher L Holloway, William F Young
Abstract: The correlation coefficient is a common metric for assessing the performance of an antenna for a multiple-input, multiple-out wireless device. In this paper, the effect of loading a reverberation chamber on the calculation of the correlation coeffici ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913700

25. Diode Power Probe Measurements of Wireless Signals
Topic: Wireless
Published: 4/15/2011
Authors: Catherine A Remley, Hugo Gomes, Alejandro Testera, Nuno Borges Carvalho, Monica Barciela
Abstract: A new view of diode power probes is presented is this paper. It is shown analytically, by simulations and with measurements, that calibration procedures for diode power probes should be rethought when measuring new wireless standard type of signals. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906083

26. 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

27. Distributed Deployment Algorithms for Improved Coverage in a Network of Wireless Mobile Sensors
Topic: Wireless
Published: 2/1/2014
Authors: Kamran Sayrafian, Vladimir V Marbukh, Hamid Mahboubi, Kaveh Moezzi, Amir Aghdam
Abstract: In this paper, sensor deployment strategies are developed for effective coverage in wireless sensor networks. In the proposed algorithms, the sensors find coverage holes within the corresponding Voronoi polygons, and then move in a proper directi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912114

28. 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

29. 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

30. 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



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