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Vuk Marojevic
Virginia Tech
100Publications
12H-index
476Citations
Publications 101
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The telecommunications industry is demanding more technical and non-technical skills as well as increased creativity and flexibility from its next generation workforce. University education provides strong fundamental background, but can offer only limited hands-on experience with cutting-edge technology, development tools, and processes as part of the broader curriculum. Whereas gaining relevant experience is generally possible for theses, we propose a new educational methodology and tools that...
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The four articles in this special section focus on secure wireless networks for vehicle-to-everything communications. Intelligent transportation systems (ITS) will support more efficient vehicular traffic flow, increased vehicular and pedestrian safety, and, eventually, autonomous driving. Wireless communications is fundamental for enabling ITS, and recent advances in communications technology and systems support establishing reliable wireless links and networks among cars, cars and pedestrians,...
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#1Junsung ChoiH-Index: 3
#2Vuk Marojevic (MSU: Mississippi State University)H-Index: 12
Last.Carl B. Dietrich (VT: Virginia Tech)H-Index: 14
view all 4 authors...
Despite the breakthroughs of wireless technology, only a few systems have been proposed for improving the safety at railroad crossings. We propose using and adapting the Dedicated Short-Range Communications (DSRC) protocol for railroad crossing protection to improve the safety of both trains and vehicles. This paper analyzes the radio frequency (RF) propagation channel and the DSRC system performance based on measurements at railroad crossings on a test track in wide-open spaces and artificial s...
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Sep 1, 2019 in VTC (Vehicular Technology Conference)
New use cases for advanced wireless technologies are emerging in the unmanned aerial systems (UAS) spaces. These put pressure on technology and regulation. The way to overcome this is to gain experience and collect data while operating UAS in production environments. To this end, we introduce AERPAW: Aerial Experimentation and Research Platform for Advanced Wireless, and present an architecture for designing a large-scale community testbed in a production-like environment to enable controllable ...
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Apr 1, 2019 in VTC (Vehicular Technology Conference)
#2Edward J. M. Colbert (ARL: United States Army Research Laboratory)H-Index: 5
Last.Jeffrey H. Reed (VT: Virginia Tech)H-Index: 48
view all 4 authors...
Spectrum regulators and stakeholders from the wireless industry and Intelligent Transportation System (ITS) communities are exploring the use of the 5.9 GHz band for the dissemination of basic safety messages. Dedicated Short Range Communications (DSRC) sends out these messages at a constant rate of 10 Hz and packet collisions occur in dense vehicular environments. In this paper, we propose a priority-based dynamic beaconing scheme. The scheme determines a higher beacon transmission rate for veh...
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#1Miao Yao (VT: Virginia Tech)H-Index: 4
#2Munawwar M. Sohul (VT: Virginia Tech)H-Index: 5
Last.Jeffrey H. Reed (VT: Virginia Tech)H-Index: 48
view all 5 authors...
The carbon footprint concern in the development and deployment of 5G new radio systems has drawn the attention to several stakeholders. In this article, we analyze the critical power consuming component of all candidate 5G system architectures—the power amplifier (PA)—and propose PA-centric resource management solutions for green 5G communications. We discuss the impact of ongoing trends in cellular communications on sustainable green networking and analyze two communications architectures that ...
7 CitationsSource
Apr 1, 2019 in VTC (Vehicular Technology Conference)
#1Raghunandan M. Rao (VT: Virginia Tech)H-Index: 4
#2Vuk Marojevic (VT: Virginia Tech)H-Index: 12
Last.Jeffrey H. Reed (VT: Virginia Tech)H-Index: 48
view all 3 authors...
Modern wireless standards such as Long-Term Evolution (LTE) and 5G New Radio (5G NR) use pilot-aided SINR estimates to adapt the modulation and coding scheme (MCS) and transmission mode of data blocks, to fully utilize the channel capacity. However, when interference is localized exclusively on non-pilot resources, pilot-aided SINR estimates become inaccurate. We show that this leads to congestion due to retransmissions, and in the worst case, outage due to very high block error rate (BLER). We ...
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Apr 1, 2019 in VTC (Vehicular Technology Conference)
#1Junsung Choi (VT: Virginia Tech)H-Index: 3
#2Vuk Marojevic (VT: Virginia Tech)H-Index: 12
Last.Carl B. Dietrich (VT: Virginia Tech)H-Index: 14
view all 5 authors...
The 5.9 GHz spectrum band is proposed for vehicular communications using Dedicated Short Range Communications (DSRC), but this band may need to be shared with unlicensed Wi-Fi devices. A recent Federal Communications Commission (FCC)’s Notice of Proposed Rulemaking (NPRM) outlines two interference mitigation techniques for spectrum coexistence: Detect and Vacate and Re-channelization. A major technical challenge of Re-channelization is that DSRC may experience harmful or a red...
Source
#1Miao YaoH-Index: 4
#2Munawwar M. SohulH-Index: 5
Last.Jeffrey H. ReedH-Index: 48
view all 4 authors...
Massive multiple-input multiple-output antenna systems, millimeter-wave communications, and ultra-dense networks have been widely perceived as the three key enablers that facilitate the development and deployment of 5G systems. This article discusses the intelligent agent that combines sensing, learning, and optimizing to facilitate these enablers. We present a flexible, rapidly deployable, and cross-layer artificial intelligence (AI)-based framework to enable the imminent and future demands on ...
3 CitationsSource
#1Miao Yao (VT: Virginia Tech)H-Index: 4
#2Matt Carrick (VT: Virginia Tech)H-Index: 2
Last.Jeffrey H. Reed (VT: Virginia Tech)H-Index: 48
view all 6 authors...
A massive multiple-input multiple-output (MIMO) requires a large number of antennas and the same amount of power amplifiers (PAs), one per antenna. As opposed to 4G base stations, which can afford highly linear PAs, next-generation base stations will need to use inexpensive PAs, which have a limited region of linear amplification. One of the research challenges is the effective handling of signals that have high peak-to-average power ratios (PAPRs), such as orthogonal frequency division multiple...
1 CitationsSource
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