Yavuz Yapici

Works (12)

Updated: July 5th, 2023 15:35

2022 journal article

Precoder Design for Physical-Layer Security and Authentication in Massive MIMO UAV Communications

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 71(3), 2949–2964.

By: S. Maeng n, Y. Yapici, I. Guvenc n , A. Bhuyan * & H. Dai n 

author keywords: Authentication; Autonomous aerial vehicles; Rician channels; Precoding; Security; Antennas; Massive MIMO; Artificial noise; authentication; fingerprinting; massive MIMO; physical layer security; precoding; UAV
TL;DR: This paper considers cellular connected UAVs (C-UAVs) that are served by massive multiple-input-multiple-output (MIMO) links to extend coverage range, while also improving physical layer security and authentication. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: March 16, 2022

2021 journal article

Dynamic Interference Management for UAV-Assisted Wireless Networks

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 21(4), 2637–2653.

By: A. Rahmati  n, S. Hosseinalipour*, Y. Yapici*, X. He*, I. Guvenc n , H. Dai n , A. Bhuyan *

author keywords: Interference; Trajectory; Three-dimensional displays; Wireless communication; Jamming; Resource management; Unmanned aerial vehicles; Unmanned aerial vehicle (UAV); jammer; trajectory optimization; power allocation; interference management; smart interferer; spectral graph theory; Cheeger constant
TL;DR: This work designs the 3D trajectories and power allocation for the UAVs to maximize the data flow of the network while keeping the interference on the existing communication network below a threshold, and proposes an alternating-maximization approach. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: April 14, 2022

2021 journal article

Physical Layer Security for NOMA Transmission in mmWave Drone Networks

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 70(4), 3568–3582.

By: Y. Yapici*, N. Rupasinghe, I. Guvenc n , H. Dai n  & A. Bhuyan *

author keywords: NOMA; Unmanned aerial vehicles; Shape; Wireless networks; Receivers; Jamming; Decoding; Millimeter-wave (mmWave); non-orthogonal multiple access (NOMA); physical layer security (PLS); protected zone; unmanned aerial vehicle (UAV)
TL;DR: This work proposes a protected-zone approach to enhance the secrecy-rate performance by preventing the most vulnerable subregion (outside the user region) from the presence of malicious receivers, and shows that the optimal protected zone shape for mmWave links appears as a compromise between protecting the angle versus distance dimension. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: May 6, 2021

2021 article

Power Allocation for Fingerprint-Based PHY-Layer Authentication with mmWave UAV Networks

IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2021).

By: S. Maeng n, Y. Yapici*, I. Guvenc n , H. Dai n  & A. Bhuyan *

author keywords: 5G; authentication; artificial noise; eavesdropping; fingerprinting; millimeter-wave; physical layer security; power allocation; precoder
TL;DR: This paper considers the authentication technique that uses fingerprint embedding to defend 5G cellular networks with unmanned aerial vehicle (UAV) systems from eavesdroppers and intruders, and proposes a power allocation technique that jointly takes into account splitting of the transmit power between the precoder and the authentication tag. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: December 13, 2021

2020 journal article

Coverage Enhancement for NLOS mmWave Links Using Passive Reflectors

IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 1, 263–281.

By: W. Khawaja* , O. Ozdemir n, Y. Yapici n, F. Erden n  & I. Guvenc n 

author keywords: Coverage; indoor; mmWave; non-line-of-sight (NLOS); outdoor; PXI; ray tracing (RT); reflector
TL;DR: This work provides an analytical model for the end-to-end received power in an NLOS scenario using reflectors of different shapes and sizes and shows that the reflected received power for the NLOS link is the same as line-of-sight (LOS) free space received power of the same link distance. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: November 24, 2019

2020 article

Energy- vs Spectral-Efficiency for Energy-Harvesting Hybrid RF/VLC Networks

2020 54TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, pp. 1152–1156.

By: Y. Yapici* & I. Guvenc n 

author keywords: DC bias; energy efficiency; hybrid RF/VLC; multi-objective optimization; spectral efficiency
TL;DR: The energy efficiency of the end-to-end network is considered in enhancing the energy-harvesting performance by choosing the optimal direct current (DC) bias, which is overlooked in the existing literature. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries
Added: September 7, 2021

2020 article

Energy-Efficient Beamforming and Power Control for Uplink NOMA in mmWave UAV Networks

2020 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM).

By: A. Rahmati n, S. Hosseinalipour n, Y. Yapici n, I. Guvenc n , H. Dai n  & A. Bhuyan *

TL;DR: This work considers the uplink millimeter-wave (mmWave) transmission between a set of UAVs and a base station (BS) and proposes a solution aided by the Dinkelbach's algorithm and successive convex approximation. (via Semantic Scholar)
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7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: October 26, 2021

2020 journal article

Multiuser Precoding for Sum-Rate Maximization in Relay-Aided mmWave Communications

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 69(6), 6808–6812.

By: A. Yalcin & Y. Yapici

author keywords: Relays; Receivers; Optimization; Precoding; MIMO communication; Unicast; Mean square error methods; Amplify-and-forward (AF) relaying; convex optimization; sum rate; minimum mean-square error (MMSE)
TL;DR: A novel joint precoder design strategy is proposed, which exploits weighted minimum mean-square error (WMMSE) using its equivalency to sum-rate maximization and verification of the superiority of the proposed precoding strategy as compared to conventional precoding schemes. (via Semantic Scholar)
Source: Web Of Science
Added: September 7, 2020

2018 journal article

Impact of Angular Spread in Moderately Large MIMO Systems Under Pilot Contamination

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 67(11), 10631–10644.

By: N. Rupasinghe  n, Y. Yapici n, J. Iscar * & I. Guvenc n 

author keywords: Eigen-beamforming (EBF); moderately large multi-input multi-output (MIMO); pilot contamination; regularized zero-forcing (RZF); uniform linear array (ULA)
TL;DR: This paper derives an exact analytical expression for achievable rates in multicell MIMO systems under pilot contamination, and characterize the relation between the AS, array size, and respective user rates. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: December 3, 2018

2018 journal article

Impact of Random Receiver Orientation on Visible Light Communications Channel

IEEE TRANSACTIONS ON COMMUNICATIONS, 67(2), 1313–1325.

By: Y. Eroglu n, Y. Yapici n & I. Guvenc n 

author keywords: Light-emitting diodes; light-fidelity (Li-Fi); probability; random variables; optical communication
TL;DR: An analytical framework is developed to characterize the statistical distribution of VLC downlink channels, which is then utilized to obtain the outage probability and the bit error rate, and the channel attenuation due to random receiver orientation and location for various scenarios of interest. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: March 4, 2019

2018 journal article

Non-Orthogonal Multiple Access for mmWave Drone Networks With Limited Feedback

IEEE TRANSACTIONS ON COMMUNICATIONS, 67(1), 762–777.

By: N. Rupasinghe  n, Y. Yapici n, I. Guvenc n  & Y. Kakishima

author keywords: 5G; drone; HPPP; mmWave; non-orthogonal multiple access (NOMA); stadium; UAV
TL;DR: A comprehensive framework over which outage probabilities and respective sum rates are derived rigorously are developed and investigated and the optimal operational altitude of UAV-BS is investigated to maximize the sum rates using the analytical framework. (via Semantic Scholar)
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13. Climate Action (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: February 18, 2019

2017 journal article

Multi-Element VLC Networks: LED Assignment, Power Control, and Optimum Combining

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 36(1), 121–135.

By: Y. Eroglu n, I. Guvenc n , A. Sahin *, Y. Yapici n, N. Pala * & M. Yuksel *

author keywords: Combining receivers; free space optics (FSO); optical wireless communications (OWC); space division multiple access (SDMA)
TL;DR: LEDs are grouped and assigned to the users based on received signal strength from each LED, for which different solutions are proposed to achieve maximum throughput, proportional fairness, and quality of service. (via Semantic Scholar)
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9. Industry, Innovation and Infrastructure (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

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