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Advanced communications

Wireless (RF)

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Displaying 176 - 200 of 1193

Wireless User Requirements for the Factory Workcell

February 8, 2021

Author(s)

Karl Montgomery, Richard Candell, Mohamed Hany, Yongkang Liu

Wireless communication is becoming crucial to advanced manufacturing. Industry 4.0 and Smart Manufacturing depend on networked industrial automation systems. The term Industrial Internet of Things (IIoT) has been used to describe the deployment of

Quasi-Deterministic Channel Model for mmWave: Mathematical Formalization and Validation

January 25, 2021

Author(s)

Chiehping Lai, Jian Wang, Camillo Gentile, Nada T. Golmie

5G and beyond networks will use, for the first time, the millimeter wave (mmWave) spectrum for mobile communications. An accurate performance evaluation is fundamental for the design of reliable mmWave networks, with the accuracy depending on the fidelity

A Link Quality Estimation-based Beamforming Training Protocol for IEEE 802.11ay MU-MIMO Communications

January 15, 2021

Author(s)

Munsuk Kim, Tanguy Ropitault, SuKyoung Lee, Nada Golmie

IEEE 802.11ay supports downlink multi-user multiple-input-multiple-output (DL MU-MIMO) transmission from an access point (AP) to multiple stations (STAs). The MU-MIMO beamforming training (BFT) enables the AP and the STAs to find appropriate directional

Independent Calculation of "Move Lists" for Incumbent Protection in a Multi-SAS Shared Spectrum Environment

January 1, 2021

Author(s)

Michael R. Souryal, Thao T. Nguyen

We present a simplified method for protecting an incumbent in shared spectrum when the secondary users are managed by independent spectrum access systems (SASs), as is the case in the 3.5 GHz Citizens Broadband Radio Service. Interference protection is

Correction of the Measured Phase of the Radiation Pattern of Millimeter-Wave Antennas

December 14, 2020

Author(s)

Antonius van den Biggelaar, Ben Jamroz, Dylan Williams, A. B. Smolders, U. Johannsen

The results of a radiation pattern measurement of a WR-28 open-ended waveguide (OEWG) are shown. At higher frequencies, the wavelength becomes shorter, making phase measurements very sensitive to positioning and alignment errors. The lack of symmetry in

Calibration of Ray-Tracing with Diffuse Scattering against 28-GHz Directional Urban Channel Measurements

November 18, 2020

Author(s)

Camillo Gentile, Jelena Senic, Chiehping Lai, Derek Caudill, Jack Chuang, Nada Golmie

This paper describes the calibration of the Volcano ray-tracing engine against channel measurements collected in an urban environment with a 28 GHz directional channel sounder. Channel multi-path components were extracted from the measurements in the delay

Smart Manufacturing Testbed for the Advancement of Wireless Adoption in the Factory

November 10, 2020

Author(s)

Rick Candell, Yongkang Liu, Mohamed Hany, Karl Montgomery, Sebti Foufou

Wireless communication is a key enabling technology central to the advancement of the goals of the Industry 4.0 smart manufacturing concept. Researchers at the National Institute of Standards and Technology are constructing a testbed to aid in the adoption

Deterministic Move Lists for Federal Incumbent Protection in the CBRS Band

October 13, 2020

Author(s)

Michael R. Souryal, Thao T. Nguyen

The 3.5 GHz citizens broadband radio service (CBRS) band in the U.S. is a key portion of mid- band spectrum shared between commercial operators and existing federal and non-federal incumbents in the band. To protect the federal incumbents from harmful

Methodology for Benchmarking Radio-Frequency Channel Sounders through a System Model

October 12, 2020

Author(s)

Camillo Gentile, Jack Chuang, Anuraag Bodi

Development of a comprehensive channel propagation model for high-fidelity design and deployment of wireless communication networks necessitates an extensive measurement campaign in a variety of operating environments and with different configuration

Link-Level Abstraction of IEEE 802.11ay based on a Multi-Path Fading Channel Model from Measurements

October 6, 2020

Author(s)

Neeraj Varshney, Jiayi Zhang, Jian Wang, Anuraag Bodi, Nada T. Golmie

This paper presents a performance analysis of the link-level abstraction for orthogonal frequency-division multiplexing (OFDM) and single-carrier (SC) modes in IEEE 802.11ay wireless systems over the 60 GHz millimeter-wave band. In particular, we evaluate

A Case Study of Medical Device Wireless Coexistence Evaluation

October 1, 2020

Author(s)

Mohamed Al-Kalaa, Joshua Guag, Seth Seidman, Yao Ma, Jason Coder

This article aims to provide a narrative for addressing wireless coexistence in medical devices to help medical device developers, test engineers, and regulatory affairs personnel throughout the device life cycle. Accordingly, we present a case-study

System Error Calibration in Large Datasets of Wireless Channel Sounding for Industrial Applications

September 30, 2020

Author(s)

Qi Wang, Rick Candell, Zhibo Pang, Wei Liang

The large comprehensive microwave wireless channel impulse response (CIR) reference dataset, measured by National Institute of Standards and Technology (NIST), has been a useful tool for industrial applications. While extensive and high-fidelity, two types

On The Quotient of Centralized and Non-Centralized Complex Gaussian Random Variables

September 23, 2020

Author(s)

Dazhen Gu

A detailed investigation of the quotient of two independent complex random variables is presented. The numerator has a zero mean, and the denominator has a non-zero mean. A normalization step is taken prior to the theoretical developments in order to

Digital Radiometer for Traceable Spectrum Sensing

September 14, 2020

Author(s)

Xifeng Lu, Dazhen Gu, Daniel G. Kuester

This paper describes a metrology instrument designed for detecting noise and interference in digital communications. A quadrature detector downconverts in-phase (I) and quadrature (Q) channels, which are each digitized at high speed. This architecture