Results 71 to 80 of about 8,421 (222)
Secure image transmission through LTE wireless communications systems
EURASIP Journal on Image and Video ProcessingSecure transmission of images over wireless communications systems can be done using RSA, the most known and efficient cryptographic algorithm, and OFDMA, the most preferred signal processing choice in wireless communications.
Farouk Abduh Kamil Al-Fahaidy +3 more
doaj +1 more source
Spectral Efficiency Comparison of OFDM and MC-CDMA with Carrier Frequency Offset [PDF]
Radioengineering, 2017 Inter-carrier interference and multiple access interference due to carrier frequency offset (CFO) are two major factors that deteriorate the performance of orthogonal frequency division multiple access (OFDMA) and multicarrier code division multiple ...
J. Ahmed
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OFDMA for Pinching-Antenna Systems
IEEE Communications LettersPinching-antenna (PA) systems route millimeter wave (mmWave) signals through a leaky waveguide and radiate them at "pinch" apertures, offering low-cost line-of-sight (LoS) coverage. However, when multiple PAs serve multiple users simultaneously, the downlink channel becomes strongly frequency-selective, creating inter-symbol interference (ISI) that ...
Thrassos K. Oikonomou +4 more
openaire +2 more sources
IET Cyber-Physical Systems: Theory &Applications, Volume 11, Issue 1, January/December 2026.This paper presents a review of analysis and optimisation methodologies for multishaper and multidomain Time‐Sensitive Networks (TSN), examining the integration of the time‐aware shaper (TAS) with mechanisms such as CBS, ATS and CQF. We analyse orchestration architectures for TSN federation, DetNet and wireless integration, highlighting the scalability
Voica Gavriluţ, Paul Pop
wiley +1 more source
ENHANCEMENT OF CODE DIVISION MULTIPLE ACCESS (CDMA) WITHIN THE GSM SYSTEM IN IRAQ
Mağallaẗ Al-kūfaẗ Al-handasiyyaẗDespite the widespread adoption of Global System for Mobile Communications (GSM) in Iraq, the network's capacity and performance limitations have become increasingly apparent, particularly in urban areas with high user density. Currently, LTE (4G) is the
Nabil Abdulwahab Abdulrazaq Baban
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Using OFDMA for MU-MIMO User Selection in 802.11ax-Based Wi-Fi Networks
IEEE Access, 2019 Two innovative multi-user (MU) communication mechanisms, multi-user multi-input multi-output (MU-MIMO) and orthogonal frequency division multiple access (OFDMA), have recently attracted much attention as key technologies to boost the capabilities of 802 ...
Kyu-Haeng Lee
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Applied Sciences, 2023 To improve the quality of service (QoS) on the internet of medical things, a cognitive radio (CR) protocol based on orthogonal frequency division multiple access (OFDMA) is proposed, named CR-OFDMA.
Suoping Li +4 more
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IET Networks, Volume 15, Issue 1, January/December 2026.This work investigates suitable MAC protocols for medical optical wireless body‐area networks (WBANs), focussing on multiple access management. Using realistic channel models, we evaluate the network performance in terms of energy efficiency, quality‐of‐service and scalability for different IEEE protocols, for both intra‐ and extra‐WBAN connectivity in
Christos Giachoudis +5 more
wiley +1 more source
Impact of radio resource allocation and pulse shaping on PAPR of SC-FDMA signals [PDF]
, 2007 "Single Carrier Frequency Division Multiple Access" (SC-FDMA) is a strong candidate for uplink transmissions in the 3G Long Term Evolution (LTE) standard.
Nix, AR +5 more
core +1 more source
Yeni Nesil Kablosuz Ağ Teknolojisi: Wimax Standardının İncelenmesi
Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2016 Wimax (Worldwide Interoperability for Microwave Access) teknolojisi, Wimax Forum tarafından çeşitli standartları geliştirilen, geniş alanda iletişim sağlayan bir kablosuz ağ teknolojisidir. Çalışma boyunca Wimax hakkında bilgi verilmiştir.
Arafat Şentürk +4 more
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