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Topic Area: Wireless

Displaying records 71 to 80 of 88 records.
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71. 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

72. 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

73. 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

74. 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

75. 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

76. 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

77. 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

78. 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

79. 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

80. 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



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