Browsing Makale Koleksiyonu by Scopus Q Value "Q1"
Now showing items 21-40 of 124
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Dual-polarized wideband 5G N77 band slotted MIMO antenna system for next-generation smartphones
(Institute of Electrical and Electronics Engineers Inc., 2024)In this work, a slotted wideband eight-element multiple-input multiple-output (MIMO) antenna system is presented, which covers the N77 (3.2-4.2 GHz) frequency band. The MIMO antennas are printed on a 0.8-mm-thick FR-4 ... -
Dynamic sidelobe multiplexing in beamspace MIMO systems
(IEEE-Institute of Electrical and Electronics Engineers Inc, 2020)Recent studies on multiplexing concept over beamspace multiple-input-multiple-output (MIMO) can reduce the need for using phase shifters while keeping the directivity performance at similar levels. Thus, beamspace MIMO ... -
Efficient POPS-OFDM waveform design for future wireless communication systems
(Ieee-Inst Electrical Electronics Engineers Inc, 2019)Future wireless networks are required to offer new applications and services, which will experience high dispersions in time and frequency, incurred mainly by coarse synchronization. Coarse synchronization is induced by ... -
Efficient spectrum occupancy prediction exploiting multidimensional correlations through composite 2D-LSTM models
(MDPI, 2021)In cognitive radio systems, identifying spectrum opportunities is fundamental to efficiently use the spectrum. Spectrum occupancy prediction is a convenient way of revealing opportunities based on previous occupancies. ... -
Eight element MIMO antenna array with tri-band response for modern smartphones
(Institute of Electrical and Electronics Engineers Inc., 2023)This article presents an eight-element tri-band Multiple Input Multiple Output (MIMO) antenna system for future handheld devices. The suggested antenna system consists of a main and sideboards. The feed lines are connected ... -
Emulation techniques for small scale fading aspects by using reverberation chamber
(Ieee-Inst Electrical Electronics Engineers Inc, 2019)Reverberation chambers (RVCs) are used to provide an efficient and reliable testbed for emulating the wireless channel effects in the laboratory environment. In the literature, various techniques have been studied to enrich ... -
Energy and spectral-efficient lens antenna subarray design in MmWave MIMO Systems
(IEEE-Institute Electrical Electronics Engineers Inc, 2022)Lens antenna subarray (LAS) is one of the recently introduced technologies for future wireless networks that significantly improves the energy efficiency of multiple-input multiple-output (MIMO) systems while achieving ... -
Enhancing the performance of low priority SUs using reserved channels in CRN
(IEEE - Institute of Electrical and Electronics Engineers, Inc., 2020)Cognitive radio networks (CRNs) are considered a promising solution for spectrum resources scarcity and efficient channel utilization. In this letter, multi-dimensional analytical Markov model based on reservation channel ... -
Exploiting user diversity in OTFS transmission for beyond 5G wireless systems
(Institute of Electrical and Electronics Engineers Inc., 2022)Orthogonal time frequency space (OTFS) modulation is a recent technology that offers a significant advantage on link reliability due to its strong delay-Doppler resilience. In classical cellular technology, overall system ... -
Extensionless adaptive transmitter and receiver windowing of beyond 5G frames
(IEEE - Institute of Electrical and Electronics Engineers, Inc, 2020)Newer cellular communication generations are planned to allow asynchronous transmission of multiple numerologies (waveforms with different parameters) in adjacent bands, creating unavoidable adjacent channel interference. ... -
Fabrication of vacuum-sealed capacitive micromachined ultrasonic transducers with through-glass-via interconnects using anodic bonding
(IEEE, 2017)This paper presents a novel fabrication method for vacuum-sealed capacitive micromachined ultrasonic transducer (CMUT) arrays that are amenable to 3D integration. This paper demonstrates that MEMS structures can be directly ... -
A flexibility metric and optimization methods for mixed numerologies in 5g and beyond
(IEEE-Inst Electrical Electronics Engineers Inc, 2018)Mixed numerology-based frame structures will be a part of 5G systems in order to enhance overall flexibility and user satisfaction. However, inter-numerology interference, spectral efficiency reduction, complexity, and ... -
Flexible guard structure for timing synchronization in coordinated networks
(Institute of Electrical and Electronics Engineers Inc., 2022)In this letter, a novel and flexible hybrid guard duration (HGD) based on zero tail (ZT) and cyclic prefix (CP) concepts is proposed for facilitating timing synchronization (TS) in coordinated multi-point (COMP) networks. ... -
Flexible physical layer security for joint data and pilots in future wireless networks
(IEEE-Institute of Electrical and Electronics Engineers Inc., 2022)In this work, novel physical layer security (PLS) schemes are proposed for orthogonal frequency-division multiplexing (OFDM) to secure both data and pilots in multiple-input multiple-output (MIMO) systems. The majority of ... -
Flexible radio access beyond 5G: A future projection on waveform, numerology, and frame design principles
(IEEE-Inst Electrical Electronics Engineers Inc, 2017)To address the vast variety of user requirements, applications, and channel conditions, flexibility support is strongly highlighted for 5G radio access technologies (RATs). For this purpose, usage of multiple orthogonal ... -
Future smartphone: MIMO antenna system for 5G mobile terminals
(IEEE-Institute of Electrical and Electronics Engineers Inc., 2021)In this article, an inverted L-shaped monopole eight elements Multiple Input Multiple Output (MIMO) antenna system is presented. The multi-antenna system is designed on a low cost 0.8 mm thick FR4 substrate having dimensions ... -
Generalized coordinated multipoint framework for 5G and beyond
(Institute of Electrical and Electronics Engineers Inc., 2021)The characteristic feature of 5G and beyond networks is the diversity of services, which is required to support different user needs. However, the requirements for these services are often competing in nature, which impresses ... -
Guard band reduction for 5G and beyond multiple numerologies
(IEEE, 2020)The existence of inter-numerology interference (INI) is a major drawback for the flexible multi-numerology frame structure proposed for the upcoming fifth generation New Radio (5G-NR). Insertion of a guard band (GB) between ... -
High range resolution at reduced sampling rates in OFDM systems exploiting pilot aliasing
(2024)High range resolution (HRR) is critical for automotive radar where it is directly dependent on the available transmission bandwidth. However, HRR sensing for OFDM entails high sampling frequencies, which extends the system's ... -
High-gain pattern reconfigurable MIMO antenna array for wireless handheld terminals
(The Institute of Electrical and Electronics Engineers, 2016)The analysis, design, experimental development, and test results of a high-gain pattern reconfigurable antenna array are presented. Unlike traditional phased arrays, the proposed array has a compressed footprint making it ...