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Displaying 1126 - 1150 of 1204

Cell Phone Forensic Tools: An Overview and Analysis Update

March 21, 2007
Author(s)
Richard Ayers, Wayne Jansen, Aurelien M. Delaitre, Ludovic Moenner
Cell phones and other handheld devices incorporating cell phone capabilities (e.g., Personal Digital Assistant (PDA) phones) are ubiquitous. Rather than just placing calls, certain phones allow users to perform additional tasks such as SMS (Short Message

Establishing Wireless Robust Security Networks: A Guide to IEEE 802.11i

February 7, 2007
Author(s)
Sheila E. Frankel, Bernard Eydt, L Owens, Karen Kent Scarfone
This report provides readers with a detailed explanation of next generation 802.11 wireless security. It describes the inherently flawed Wired Equivalent Privacy (WEP) and explains 802.11i's two-step approach (interim and long-term)to providing effective

A Measurement of Propagation Delay

January 16, 2007
Author(s)
Donald R. Larson, Nicholas Paulter
A measurement method and associated uncertainty analysis have been developed for the measurement of propagation or group delay in electrical transmission lines and optical fibers. The measurement method and uncertainty analysis were applied to measurements

Eliminating FFT Artifacts in Vector Signal Analyzer Spectra

October 1, 2006
Author(s)
Michael McKinley, Kate Remley, M. Myslinski, J. S. Kenney
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 the

Link Assessment in an Indoor 802.11 Network

April 1, 2006
Author(s)
Michael R. Souryal, Luke Klein-Berndt, Leonard E. Miller, Nader Moayeri
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 and the

A Measurement-Based Multisine Design Procedure

January 1, 2006
Author(s)
M. Myslinski, Kate Remley, Michael McKinley, Dominique Schreurs, Bart Nauwelaers
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 and

Joint Rate Adaptation and Channel-Adaptive Relaying in 802.11 Ad Hoc Networks

January 1, 2006
Author(s)
Michael R. Souryal, Nader Moayeri
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

Channel-Adaptive Relaying in Mobile Ad Hoc Networks with Fading

October 1, 2005
Author(s)
Michael R. Souryal, Nader Moayeri
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 multipath

Soft Decision Metrics for Turbo-Coded FH M-FSK Ad Hoc Packet Radio Networks

October 1, 2005
Author(s)
B M. Peric, Michael R. Souryal, E G. Larsson, B R. Vojcic
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 exponent
Displaying 1126 - 1150 of 1204
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