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Topic Area: Wireless

Displaying records 31 to 40 of 96 records.
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31. The Reverberation Chamber's Unstirred Field: A Validation of the Image Theory Interpretation
Topic: Wireless
Published: 8/15/2011
Authors: Ryan J. Pirkl, John M Ladbury, Catherine A Remley
Abstract: Synthetic aperture measurements of a reverberation chamber's unstirred wireless channel are used to compare the observed power, time-of-arrival, and angle-of-arrival of unstirred multipath components to that predicted by ray/image theory for a re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907962

32. Ant-Colony Based Near-ML Block Decoder in Asynchronous Cooperative MIMO Systems Using a Linear Dispersion Structure
Topic: Wireless
Published: 6/5/2011
Authors: Hamid Gharavi, Chong Xu
Abstract: The linear dispersion structure is employed to accommodate the dynamic topology of cooperative networks, as well as to achieve higher throughput than conventional space-time codes based on orthogonal designs. Asynchronous Cooperative Liner Dispersio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907007

33. Pixel Interlacing Based Video Transmission for Low-complexity Intra-frame Error Concealment
Topic: Wireless
Published: 6/1/2011
Author: Hamid Gharavi
Abstract: When multi-path fading and interference frequently disrupts a mobile radio communication system, it can seriously undermine its reliability for transmission of compressed video signals. In this paper, we present a pixel interlacing based video transm ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908154

34. Selective Pixel Interpolation for Spatial Error Concealment
Topic: Wireless
Published: 6/1/2011
Authors: Hamid Gharavi, Yi Ge, Bo Yan, Kairan Sun
Abstract: This paper proposes an effective algorithm for spatial error concealment with accurate edge detection and partitioning interpolation. Firstly, a new method is used for detecting possible edge pixels and their matching pixels around the lost block ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909111

35. A Joint Vehicle-Vehicle/Vehicle-Roadside Communication Protocol for Highway Traffic Safety
Topic: Wireless
Published: 5/1/2011
Author: Hamid Gharavi
Abstract: In this paper, a joint vehicle-vehicle/vehicle-roadside communication protocol is proposed for cooperative collision avoiding in Vehicular Ad Hoc Networks (VANETs). In this protocol, emergency warning messages are simultaneously transmitted via Veh ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908093

36. Diode Power Probe Measurements of Wireless Signals
Topic: Wireless
Published: 4/15/2011
Authors: Catherine A Remley, Hugo Gomes, Alejandro Testera, Nuno Borges Carvalho, Monica Barciela
Abstract: A new view of diode power probes is presented is this paper. It is shown analytically, by simulations and with measurements, that calibration procedures for diode power probes should be rethought when measuring new wireless standard type of signals. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906083

37. Reference Modulation for Calibrated Measurements of Tag Backscatter
Topic: Wireless
Published: 4/14/2011
Authors: Daniel G. Kuester, David R Novotny, Jeffrey R Guerrieri, Randy Direen, Zoya Popovic
Abstract: We present a model and reference backscatter device for calibrating measurements of 860-960 MHz Ultra-High Fre- quency (UHF) tag backscattering. The model relates transmission to and backscattering from the device with a modulation depth calculab ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907507

38. RFID-based Localization and Tracking Technologies
Topic: Wireless
Published: 4/1/2011
Authors: Michael R Souryal, Lionel M. Ni, Dian Zhang
Abstract: Radio Frequency Identification (RFID) usually incorporates a tag into an object for the purpose of identification or localization using radio signals. It has gained a lot of attention recently due to its advantages in terms of low cost and easy deplo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905571

39. Measurements and Models for the Wireless Channel in a Ground-Based Urban Setting in Two Public Safety Frequency Bands
Series: Technical Note (NIST TN)
Report Number: 1557
Topic: Wireless
Published: 1/20/2011
Authors: William F Young, Catherine A Remley, David W. Matolak, Qian Zhang, Christopher L Holloway, Chriss A. Grosvenor, Camillo A Gentile, Galen H Koepke, Qiong Wu
Abstract: We report on measured peer-to-peer (ground-based) wireless channel characteristics for an urban environment in two public safety frequency bands. Results are based upon measurements taken in Denver in June 2009. The public safety bands we investigate ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908165

40. Performance Measurements and Analysis of Low Data Rate Wireless Communication Under Interference Sources in Buildings
Topic: Wireless
Published: 10/13/2010
Authors: Wenqi Guo, William M Healy, Mengchu Zhou
Abstract: Interference from collocated networks operating over the same frequency range becomes an increasingly severe problem as the number of networks overlapping geographically increases within commercial and residential buildings. This paper aims to highli ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905715



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