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Advanced communications

Wireless (RF)

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Displaying 301 - 325 of 645

Black Box Measurement of System Noise in Integrated Wireless Receivers

September 13, 2017
Author(s)
Daniel G. Kuester, Duncan A. McGillivray, Sheryl M. Genco, Dazhen Gu
Tightly-integrated antennas and inaccessible radio frequency (RF) outputs are common barriers to measuring system noise in integrated wireless receive systems. We propose a solution centered on locating "SNR isoresponses" --- processed receiver outputs

Multiple Sources in a Reverberant Environment: The "Cocktail Party Effect"

September 3, 2017
Author(s)
Perry F. Wilson
This electronic Acoustics and electromagnetics have a number of parallels based on similar equations describing propagation, reflection, and reverberation. This paper considers one example, the "cocktail party effect", that describes speech comprehension

3.5 GHz Environmental Sensing Capability Detection Thresholds and Deployment

September 1, 2017
Author(s)
Thao Nguyen, Anirudha Sahoo, Michael R. Souryal, Timothy Hall
Spectrum sharing in the 3.5~GHz band between commercial and government users along U.S. coastal areas depends on an Environmental Sensing Capability (ESC)---that is, a network of radio frequency sensors and a decision system---to detect the presence of

3.5 GHz Radar Waveform Capture at Fort Story

August 4, 2017
Author(s)
Paul D. Hale, Jeffrey A. Jargon, Peter J. Jeavons, Michael R. Souryal, Adam J. Wunderlich, Mark Lofquist
We describe measurements to create a library of high-fidelity waveforms of federal incumbent radar signals currently operating in the 3550 MHz – 3650 MHz (“3.5 GHz”) band. In this second phase of assembling the library, measurements were collected at Fort

Real-Time Scheduling for Wireless Networks with Random Deadlines

July 26, 2017
Author(s)
Mohamed Hany, Nader Moayeri
The use of wireless communications in industrial environments is motivated by the flexibility that wireless networks provide and their cost-efficient setup and maintenance. Various wireless technologies have been introduced to satisfy the strict industrial

Updated NIST Guidance for Bluetooth Security

July 26, 2017
Author(s)
Lidong Chen, Larry Feldman, Gregory A. Witte
This bulletin summarizes the information in NIST SP 800-121, Revision 2: Guide to Bluetooth Security which provides information on the security capabilities of Bluetooth and provides recommendations to organizations employing Bluetooth wireless

Autonomous Relocation Strategies for Cells on Wheels in Public Safety Networks

July 20, 2017
Author(s)
Kamran Sayrafian, Ladan Rabieekenari
Lack of network availability or limited access to communication services are among the challenges that public safety officials and first responders could face during disasters or emergency scenarios. Networking infrastructure can partially (or sometimes

Measurement Challenges for 5G and Beyond

July 14, 2017
Author(s)
Catherine A. Remley, Jeffrey A. Jargon, Joshua A. Gordon, Alexandra E. Curtin, David R. Novotny, Christopher L. Holloway, Robert D. Horansky, Michael S. Allman, Jeanne T. Quimby, Camillo A. Gentile, Peter B. Papazian, Ruoyu Sun, Damir Senic, Jelena Senic, Matthew T. Simons, Maria G. Becker, Dylan F. Williams, Richard A. Chamberlin, Jerome G. Cheron, Ari D. Feldman, Paul D. Hale, Mohit S. Mujumdar, Nada T. Golmie
National Metrology Institutes (NMIs) around the world are charged with supporting industry through improved measurement science and by providing a traceability path to fundamental physical standards. Mobile wireless communications have become a ubiquitous

Equivalent Isotropic Response as a Surrogate for Incident Field Strength

July 9, 2017
Author(s)
Dan Kuester, Duncan McGillivray, William F. Young, John M. Ladbury, Ari Feldman, Adam Wunderlich, Sheryl M. Genco
The strength of a radiated field at some location in free space can be described in terms of the equivalent conducted output from an isotropic probe antenna with a specified reference polarization. This metric has already entered use by various standards

A Novel Adaptive Transmission Algorithm for Device-to-Device Direct Discovery

June 27, 2017
Author(s)
Aziza Ben Mosbah, David W. Griffith, Richard A. Rouil
In this paper we study and improve one service used for Proximity Services and Device-to-Device (D2D) communications: D2D Direct Discovery. As defined in the Third Generation Partnership Project, for both in-coverage and out-of-coverage cases, resource

Channel Sounder Measurement Verification and Uncertainty

June 2, 2017
Author(s)
Catherine A. Remley, Jeanne T. Quimby, Paul D. Hale, Dylan F. Williams, Jeffrey A. Jargon, Rodney W. Leonhardt
This presentation describes channel-sounder measurement verification procedures including options such as comparing measurements to theory, conducted tests of a known, simulated-channel artifact, direct over-the-air comparison to a vector network analyzer

Channel Modeling and Performance of Zigbee Radios in an Industrial Environment

May 31, 2017
Author(s)
Mehrdad Damsaz, Derek Guo, Jeff Peil, Wayne Stark, Nader Moayeri, Rick Candell
In this paper we describe measurements of wireless propagation characteristics to develop path loss models in industrial environments. The models for path loss we develop are two-slope models in which the path loss is a piecewise linear relation with the

Physical Sidelink Control Channel (PSCCH) in Mode 2: Performance Analysis

May 25, 2017
Author(s)
David W. Griffith, Fernando J. Cintron, Richard A. Rouil
User Equipments (UEs) that send data must advertise the upcoming transmission by broadcasting signaling messages over the Physical Sidelink Control Channel (PSCCH). Thus, it is important for the network operator to define the PSCCH resource pool to

Quasi-deterministic Model for Doppler Spread in Millimeter-wave Commmunication Systems

May 18, 2017
Author(s)
Jian Wang, Camillo Gentile, Peter B. Papazian, Jae-Kark Choi, Jelena Senic
The most salient feature differentiating millimeter-wave communication systems from their predecessors will be the steerable pencilbeam antennas at the transceivers. As opposed to conventional widebeam antennas, only a few multipath components will be

3.5 GHz Radar Waveform Capture at Point Loma

May 11, 2017
Author(s)
Paul D. Hale, Jeffrey A. Jargon, Peter J. Jeavons, Michael R. Souryal, Adam J. Wunderlich, Mark Lofquist
We describe measurements to create a library of high-fidelity waveforms of federal incumbent radar signals currently operating in the 3550 MHz – 3650 MHz (“3.5 GHz”) band. In the first phase of assembling this library, measurements were collected at Point

Industrial Wireless Systems Workshop Proceedings

May 11, 2017
Author(s)
Richard Candell
Background: Wireless technology has great appeals to many manufacturers, in this case industrial automation systems, which include process control, discrete manufacturing, safety systems, and building automation. Applying wireless sensing and control
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