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Topic Area: Wireless

Displaying records 81 to 90 of 95 records.
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81. 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

82. 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

83. 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

84. 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

85. 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

86. 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

87. 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

88. Soft Decision Metrics for Turbo-Coded FH M-FSK Ad Hoc Packet Radio Networks
Topic: Wireless
Published: 10/1/2005
Authors: B M Peric, Michael R Souryal, E G Larsson, B R Vojcic
Abstract: This paper addresses turbo-coded non-coherent FH M-FSK ad hoc networks with a Poisson distribution of interferers where multiple access interference can be modeled as symmetric a-stable (SaS) noise and a is inversely proportional to the path loss ex ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150118

89. Soft-Decision Metrics for Coded Orthogonal Signaling in Symmetric Alpha-Stable Noise
Topic: Wireless
Published: 3/1/2005
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 symmetric a-stable noise, which has been used to model impulsive noise. In addition to the optimum metrics for Gaussian (a = 2) noise and Cauchy (a = 1) noise, a class of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50117

90. Information Efficiency of Multihop Packet Radio Networks and Channel-Adaptive Routing
Topic: Wireless
Published: 1/1/2005
Authors: Michael R Souryal, B R Vojcic, R L Pickholtz
Abstract: We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all ha ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150126



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