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Topic Area: Wireless
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Displaying records 51 to 60 of 93 records.
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51. Measurements in Harsh RF Propagation Environments to Support Performance Evaluation of Wireless Sensor Networks
Topic: Wireless
Published: 6/5/2009
Authors: Catherine A Remley, Galen H Koepke, Christopher L Holloway, Dennis G Camell, Chriss A. Grosvenor
Abstract: We describe common performance evaluation methods for wireless devices, including wireless sensors, and how measurements of real-world propagation environments are used to support the evaluation process. We then present representative measurement dat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901417

52. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901365

53. Measurements to Support Public Safety Communications: Attenuation and Variability of 750 MHz Radio Wave Signals in Four Large Building Structures: NIST Technical Note 1552
Series: Technical Note (NIST TN)
Topic: Wireless
Published: 8/7/2009
Authors: William F Young, Catherine A Remley, John M Ladbury, Christopher L Holloway, Chriss A. Grosvenor, Galen H Koepke, Sander Floris, Wouter Numan, Andrea Garuti
Abstract: In this report, we investigate radio communication problems faced by emergency responders (firefighters, police, and emergency medical personnel) in disaster situations. A fundamental challenge to radio communications into and out of large buildings ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903077

54. Modeling and Measurement of Nonlinear Distortion in Software-Defined-Radio Receiver Front Ends
Topic: Wireless
Published: 6/4/2010
Authors: Catherine A Remley, Nuno Carvalho, Pedro Cruz
Abstract: We evaluate the nonlinear distortion in a software-defined radio front end consisting of a low-noise amplifier followed by an analog-to-digital converter. We then develop a behavioral model that captures the key elements of the nonlinear distortion. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33010

55. NIST Measurements in the 750 MHz Band to Support Emergency Response Radio Communications
Topic: Wireless
Published: 5/7/2010
Authors: Catherine A Remley, Christopher L Holloway, william f. Young
Abstract: The National Institute of Standards and Technology (NIST) has just released the sixth in a series of NIST technical notes (TN) on radio signal penetration of radio signals in large building structures (apartment complex, hotel, office buildings, spor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905183

56. Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver
Topic: Wireless
Published: 11/30/2008
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 for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152159

57. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905550

58. Novel Tree-Search Algorithm versus Sphere-Decoding-based Algorithms for MIMO system with Inter-Symbol Interference
Topic: Wireless
Published: 12/3/2012
Author: Hamid Gharavi
Abstract: In this paper we firstly propose a general model to combat the Inter-Symbol Interference (ISI) caused by frequency selective channels in a Multi-InputMulti-Output (MIMO) system and/or by asynchronous cooperative transmissions. The general model is no ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911826

59. On the Delay and Data Rate Performance of Throughput-Efficient Multi-Channel Access Algorithms in Cognitive Radio Networks
Topic: Wireless
Published: 7/8/2013
Authors: Kamran Sayrafian, Luca Zappaterra, Hyeong-Ah Choi, Jari Iinatti
Abstract: Cognitive Radio Networks (CRNs) are designed to increase spectrum utilization by allowing unlicensed secondary users (SUs) to operate over existing wireless channels where primary users (PUs) have license to transmit. An SU searches for channels not ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913813

60. Parametric Study on the use of Reverberation Chambers for Repeatable/Controllable Wireless Testing: Application to BER Measurements
Topic: Wireless
Published: 4/12/2010
Authors: Christopher L Holloway, E Genender, Catherine A Remley, John M Ladbury, Galen H Koepke
Abstract: We illustrate use of the reverberation chamber to simulate different wireless propagation environments including effects such as narrowband or frequency-selective fading and Doppler spread. These effects have a strong impact on the quality of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32988



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