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Advanced communications

Wireless (RF)

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Displaying 226 - 250 of 1205

Evaluating Uncertainty of Microwave Calibrations with Regression Residuals

June 6, 2020
Author(s)
Dylan F. Williams, Benjamin F. Jamroz, Jake D. Rezac, Robert D. Jones
We present a sensitivity-analysis and a Monte-Carlo algorithm for evaluating the uncertainty of multivariate microwave calibration models with regression residuals. We then use synthetic data to verify the performance of the algorithms and explore their

Blind Measurement of Receiver System Noise

June 4, 2020
Author(s)
Dan Kuester, Adam Wunderlich, Duncan McGillivray, Dazhen Gu, Audrey Puls
Tightly packaged receive systems pose a challenge for noise measurements. The only available receiver outputs are often user data: link benchmark or diagnostic information that can be scavenged with software. These could include data rate benchmark, self

Frequency Invariant Beampatterns for Wideband Synthetic Aperture Channel Sounders

May 29, 2020
Author(s)
Peter G. Vouras, Jeanne T. Quimby, Benjamin F. Jamroz, Alec J. Weiss, Rodney W. Leonhardt, Dylan F. Williams, Catherine A. Remley
This paper derives two novel frequency invariant beamformers (FIBs) for use with wideband synthetic aperture channel sounders. Results using measured data show that the choice of beam pattern can affect the amount of diffuse multipath energy received

A Unified Analytical Approach to Multi-Cell LBT-Based Spectrum Sharing Systems

May 28, 2020
Author(s)
Yao Ma, Somayeh Mosleh, Jason B. Coder
Future unlicensed spectrum sharing scenarios involve multi-cell, multi-tier access of incumbent and emerging wireless systems, such as wireless local area network (WLAN), new-radio unlicensed (NR-U), and long-term evolution (LTE)with licensed assisted

Precision Millimeter-Wave Modulated Wideband Source for Over-The-Air Reference at 92.4 GHz

April 22, 2020
Author(s)
Paritosh Manurkar, Robert D. Horansky, Benjamin F. Jamroz, Jeffrey A. Jargon, Dylan F. Williams, Catherine A. Remley
As the next generation communications technology continues to evolve to utilize millimeter-wave frequencies, calibration methods are needed for the nonidealities related to these frequencies in communications electronics. In this work, we demonstrate a 1

Channel Sounder Measurement Verification: Conducted Tests

April 15, 2020
Author(s)
Jeanne T. Quimby, Jeffrey A. Jargon, Rodney W. Leonhardt, Jake D. Rezac, Paul D. Hale, Catherine A. Remley, Amanda A. Koepke, Robert Johnk, chriss Hammerschmidt, Paul Mckenna, Irena Stange, Mike Chang
Channel modeling often provides a basis for the design and deployment of wireless technology. Engineers design systems to operate under certain expected channel conditions. Channel models are typically based on the statistics of a collection of many

On Selecting Channel Parameters for Public Safety Network Applications in LTE Direct

March 26, 2020
Author(s)
Siyuan Feng, Hyong-Ah Choi, David W. Griffith, Richard A. Rouil
The Third Generation Partnership Project (3GPP) defines various pre-configured channel parameters for the Long- Term Evolution (LTE) Device-to-Device (D2D) communications with Physical Sidelink (SL) Channels. In this paper, we investigate the impacts of
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