U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 926 - 950 of 1204

Selective Pixel Interpolation for Spatial Error Concealment

June 1, 2011
Author(s)
Hamid Gharavi, Yi Ge, Bo Yan, Kairan Sun
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. Then

From the Editor's Desk: Communication is Vital

May 5, 2011
Author(s)
Catherine A. Remley
This is an Editorial for the June, 2011 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of the Microwave Theory and Techniques Society (MTT-S).

Diode Power Probe Measurements of Wireless Signals

April 15, 2011
Author(s)
Catherine A. Remley, Hugo Gomes, Alejandro Testera, Nuno B. Carvalho, Monica Barciela
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. In

Reference Modulation for Calibrated Measurements of Tag Backscatter

April 14, 2011
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Randy Direen, Zoya Popovic
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 calculable from

Reference Modulation for Calibrated Measurements of Tag Backscatter

April 12, 2011
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Randy Direen, Zoya Popovic
This paper presents an active antenna designed to modulate the scattering of an interrogating wave in the 860-960 MHz UHF RFID band. The device can be characterized with straightforward S- parameter measurements, and can then be used for characterization

RFID-based Localization and Tracking Technologies

April 1, 2011
Author(s)
Michael R. Souryal, Lionel M. Ni, Dian Zhang
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 deployment

Minimum-Risk Layer 2 Trigger Levels for Proactive Media-Independent Handovers

February 1, 2011
Author(s)
David W. Griffith, Alexandre Delye, Nada T. Golmie
Anticipated handovers that use Link Going Down (LGD) and Link Down (LD) trigger events require the network operator to set the LGD trigger high enough that the handover completes before the LD trigger event. However, setting the LGD trigger too high can

Measurements and Models for the Wireless Channel in a Ground-Based Urban Setting in Two Public Safety Frequency Bands

January 20, 2011
Author(s)
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
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 investigated are

Radio Frequency and Analog/Mixed-Signal Technologies for Wireless Communications

January 13, 2011
Author(s)
Herbert S. Bennett, John J. Pekarik, Margaret Huang
Radio frequency (RF) and analog mixed-signal (AMS) technologies serve the very rapidly growing wireless communications market and represent essential and critical technologies for the success of many semiconductor manufacturers. Communications products are

From the Editor's Desk: A Little Friendly Competition

December 1, 2010
Author(s)
Catherine A. Remley
This is an Editorial for the December, 2010 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of the Microwave Theory and Techniques Society (MTT-S).

An Integrated PHY and MAC Layer Model for Half-Duplex IEEE 802.11 Networks

November 2, 2010
Author(s)
David W. Griffith, Michael R. Souryal, Camillo A. Gentile, Nada T. Golmie
This paper introduces an IEEE 802.11 analytical model that examines uplink and downlink communications between non-saturated stations and a non-saturated access point. The model integrates channel effects and collisions into a single expression for the
Displaying 926 - 950 of 1204
Was this page helpful?