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Displaying records 81 to 90 of 98 records.
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81. 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

82. 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

83. 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

84. Eliminating FFT Artifacts in Vector Signal Analyzer Spectra
Topic: Wireless
Published: 10/1/2006
Authors: Michael McKinley, Catherine A Remley, M. Myslinski, J. S. Kenney
Abstract: We present a method to minimize spectral leakage in measurements of periodic signals made with the vector signal analyzer (VSA) by taking into account the periodic nature of the Fast Fourier Transform (FFT). This method negates the need for filtering ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32196

85. Performance of Amplify-and-Forward and Decode-and-Forward Relaying in Rayleigh Fading With Turbo Codes
Topic: 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

86. Adaptive Modulation In Ad Hoc DS/CDMA Packet Radio Networks
Topic: Wireless
Published: 4/1/2006
Authors: Michael R Souryal, B R Vojcic, R L Pickholtz
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51334

87. 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

88. A Measurement-Based Multisine Design Procedure
Topic: Wireless
Published: 1/1/2006
Authors: M. Myslinski, Catherine A Remley, Michael McKinley, Dominique Schreurs, Bart Nauwelaers
Abstract: This work presents a procedure to design a multisine with probability density function (PDF) similar to that of a measured realistic digitally modulated signal. We discuss important practical issues crucial to the successful multisine construction an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32197

89. 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

90. Channel-Adaptive Relaying in Mobile Ad Hoc Networks with Fading
Topic: Wireless
Published: 10/1/2005
Authors: Michael R Souryal, Nader Moayeri
Abstract: This paper describes an approach for relaying in multihop networks that adapts to the time-varying channel and exploits spatial diversity to mitigate multipath fading. Ignored in some simulation-based performance analyses, fading arises from multipa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150119



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