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Displaying records 31 to 40 of 45 records.
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31. Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver
Topic: Wireless
Published: 7/30/2010
Author: Michael R Souryal
Abstract: This paper proposes a simple non-coherent amplify-and-forward receiver for the relay channel and evaluates its diversity performance for Rayleigh fading channels. We use the generalized likelihood ratio test to obtain the decision rule in closed form ...

32. Impact of RF Interference between a Passive RFID System and a Frequency Hopping Communications System in the 900 MHz ISM Band
Topic: Wireless
Published: 7/25/2010
Author: Michael R Souryal
Abstract: We present experimental measurements and analysis of RF interference between a passive RFID system and a generic frequency hopping communications system in the 902 928 MHz ISM radio band. Interference in both directions is considered, RFID to communi ...

33. Rapidly-Deployable Mesh Network Testbed
Topic: Wireless
Published: 11/30/2009
Authors: Michael R Souryal, Nader Moayeri, Andreas Wapf
Abstract: This paper describes a wireless mesh network testbed for research in rapid deployment and auto-configuration of mesh nodes. Motivated by the needs of first responders and military personnel arriving to an incident area, we developed and tested an au ...

34. Measurements to Support Performance Evaluation of Wireless Communications in Tunnels for Urban Search and Rescue Robots
Topic: Wireless
Published: 9/4/2009
Authors: Catherine A Remley, Galen H Koepke, Dennis G. Camell, George Hough
Abstract: We describe methods for evaluating the performance of the wireless link used for control and telemetry for urban search and recue robots. These methods are based on identification and evaluation of performance metrics that describe impairments to the ...

35. Radio Frequency and Analog/Mixed-Signal (RF and AMS) Technologies for Wireless Communications
Topic: Wireless
Published: 1/5/2009
Authors: Herbert S Bennett, Margaret Huang, John J. Pekarik
Abstract: The challenges facing the RF and AMS community as represented by the International Technology Roadmap for Semiconductors are summarized in this paper.

36. Guide to Securing Legacy IEEE 802.11 Wireless Networks
Series: Special Publication (NIST SP)
Report Number: 800-48 Rev 1
Topic: Wireless
Published: 7/25/2008
Authors: Karen Ann Scarfone, Derrick Dicoi, Matt Sexton, Cyrus Tibbs
Abstract: The purpose of this document is to provide guidance to organizations in securing their legacy Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area networks (WLAN) that cannot use IEEE 802.11i. The document provides an ...

37. 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 ...

38. 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 ( ...

39. 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

40. 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 ...

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