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Relevant bibliographies by topics / High-mobility communications / Dissertations / Theses

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Dissertations / Theses on the topic 'High-mobility communications'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Belmekki, Sabrine. "Multi-level risk and collective perception for high quality of service automated mobility in a highly dynamic V2X connected environment." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILB009.

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Les technologies des véhicules automatisés se développent rapidement et sont deplus en plus présentes dans notre vie quotidienne pour créer des systèmes de trans-port entièrement connectés. Les constructeurs automobiles équipent à présent lesderniers modèles de véhicules de certaines fonctions d'aide à la conduite. Les avan-tages potentiels de ces véhicules incluent la réduction des collisions, l'atténuationdes embouteillages, la réduction de la consommation de carburant, et une flexibil-ité accrue pour les personnes qui n'ont pas accès aux transports. Pour permettrel'automatisation de ces fon

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2

Mapoka, Trust Tshepo. "Location based authenticated multi-services group key management for cyber security in high speed broadband wireless multicast communications : multi-service group key management scheme with location based handover authentication for multi-handoffs participating in multi-group service subscriptions, its performance evaluation and security correctness in high speed broadband wireless multicast communications." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14468.

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Secure information exchanges over cyberspace is on the increase due to the convergence of wireless and mobile access technologies in all businesses. Accordingly, with the proliferation of diverse multicast group service subscriptions that are possible to co-exist within a single broadband network, there is also huge demand by the mobile subscribers to ubiquitously access these services over high speed broadband using their portable devices. Likewise, the Network Providers (NPs) invest hugely in infrastructure deployment to disseminate these services efficiently and concomitantly. Therefore, cy

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3

MELIANI, Chafik. "Circuits intégrés amplificateurs à base de transistors HEMT pour les transmissions numériques à très haut débit (>=40 Gbit/s)." Phd thesis, Université Paris-Diderot - Paris VII, 2003. http://tel.archives-ouvertes.fr/tel-00007587.

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La systématisation de la conversion analogique/numérique a eu pour effet d'uniformiser le mode de transmission de données aux transmissions numériques ; et notamment sur fibre optique. Dans ce cadre, cette thèse traite des méthodologies de conception et faisabilité de circuits amplificateurs de signaux rapides. Après l'étude de l'effet des éléments parasites sur les structures amplificatrices de base (spécifiquement, les problèmes de chemins de masse, et de référencement de signaux d'entrée), la théorie de distribution est appliquée à la technologie coplanaire InP ; où via une méthodologie que

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4

He, Lanlan, and 何兰兰. "Data detection for OFDM systems under high mobility." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45876642.

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5

Aziz, Farhan Muhammad. "Implementation and Analysis of Wireless Local Area Networks for High-Mobility Telematics." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33505.

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Wireless networks provide communications to fixed, portable and mobile users and offer substantial flexibility to both end-users and service providers. Current cellular/PCS networks do not offer cost effective high data rate services for applications, such as, telematics, traffic surveillance and rescue operations. This research studies the feasibility and behavior of outdoor implementation of low-cost wireless LANs used for high mobility telematics and traffic surveillance. A multi-hop experimental wireless data network is designed and tested for this purpose. Outdoor field measurements show

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6

Qu, Ming. "Experimental studies of wireless communication and GNSS kinematic positioning performance in high-mobility vehicle environments." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/50953/1/Ming_Qu_Thesis.pdf.

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In order to support intelligent transportation system (ITS) road safety applications such as collision avoidance, lane departure warnings and lane keeping, Global Navigation Satellite Systems (GNSS) based vehicle positioning system has to provide lane-level (0.5 to 1 m) or even in-lane-level (0.1 to 0.3 m) accurate and reliable positioning information to vehicle users. However, current vehicle navigation systems equipped with a single frequency GPS receiver can only provide road-level accuracy at 5-10 meters. The positioning accuracy can be improved to sub-meter or higher with the augmented GN

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7

Hassan, Kais. "Contributions aux capacités de reconnaissance de l'environnement de la Radio Cognitive pour des applications mobiles à grande vitesse." Thesis, Valenciennes, 2012. http://www.theses.fr/2012VALE0035/document.

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Les principaux objectifs des opérateurs ferroviaires visent à accroître la sécurité, réduire les coûts d’exploitation et de maintenance et augmenter l’attractivité et les bénéfices du transport ferroviaire en offrant de nouveaux services aux passagers. Ceci ne pourra être atteint que grâce à la multiplication des échanges de données entre les différents acteurs du monde ferroviaire. L’interopérabilité, l’efficacité spectrale, l’optimisation de l’usage des ressources radio et l’amélioration de la fiabilité des communications sont des exigences fortes pour les applications de télécommunication f

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8

Uppoor, Sandesh. "Understanding and Exploiting Mobility in Wireless Networks." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00912521.

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Le degré de pénétration du marché des appareils intelligents tels que les smartphones et les tablettes avec les technologies de communication embarquées comme le WiFi, 3G et LTE a explosé en moins d'une décennie. En complément de cette tendance technologique, les appli- cations des réseaux sociaux ont virtuellement connecté une grande partie de la population, en génèrant une demande de trafic de données croissant vers et depuis l'infrastructure de com- munication. Les communications pervasive ont aussi acquis une importance dans l'industrie automobile. L'émergence d' une gamme impressionnante

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9

Laiyemo, A. O. (Ayotunde Oluwaseun). "High speed moving networks in future wireless systems." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219578.

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Abstract This thesis concentrates on evaluating and improving the throughput performances of mobile users in high speed vehicles. In particular, high speed train (HST) scenarios are considered. Emphasis is placed on practical designs and methods that take into account distinctive HST characteristics. A two-hop communication link, i.e., base station (BS)-to-HST and HST-to-onboard users (OBUs) is adopted. The main target is to improve the throughput performance on the BS-to-HST communication link, which is assumed to be the main bottleneck in the whole communication link, since the HST-to-OBU co

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10

Lin, Chi-Sheng, and 林啟盛. "Mobility Management in Very High Mobility Communications." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/68284991955558947578.

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碩士<br>國立暨南國際大學<br>電機工程學系<br>94<br>Researchers of mobility management have often assumed that all mobile users are moving independently. In other words, mobile users are no correlation between each other. But after the mass transportation vehicles become faster and more popular, it brings several issues. What we pay attention to are very high mobility (VHM) and group moving. However, research which has empirically documented the link between these is scant. Therefore, the aim of this thesis attempts to explore how mobility management works in very high mobility communications (VHMC) and mass tr

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11

Abou, Saleh HASSAN. "Predictive Wireless Antenna Selection for High Mobility Conditions." Thesis, 2013. http://hdl.handle.net/1974/7791.

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Accurate channel knowledge is indispensable to the practical success of channel-aware wireless communication technologies. However, channel estimates obtained from pilot symbols rapidly become outdated due to fast time variations of multipath fading channels. To reduce system cost, antenna subset selection reduces radio frequency (RF) chain components. For systems selecting a subset of a plurality of antennas for reception, this outdated channel information is a significant impediment to selection and data decoding reliability. In this thesis, training-based schemes for antenna selection (AS)

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12

Liu, Szu-Chi, and 劉思齊. "A Baseband DSP Engine for High Mobility MIMO/OFDM Communications." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/70243318272273858098.

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碩士<br>國立清華大學<br>電機工程學系<br>97<br>In this paper, a 4x4 multiple-input multiple-outputorthogonal frequency division multiple access (MIMO-OFDMA) downlink transceiver based on IEEE 802.16e-2005 standard is proposed. Under high mobility environment, wireless channel is effected by Doppler Effect critically. A low complexity Channel-estimator is proposed in this thesis for detecting the channel information which change rapidly in high mobility environment and a simplified pipelined SFBC decoder is also proposed to demodulate the received signal. Moreover, an ICI-compensation system is proposed to mi

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13

Wu, Wei-Li, and 吳偉立. "Feasible Study of Using STC Algorithms in MIMO Wireless Communications in Very High Mobility Environment." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/39736558623570595518.

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14

Surabhi, G. D. "On Orthogonal Time Frequency Space Modulation for Wireless Communications." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4461.

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Future wireless communication systems are envisioned to support diverse requirements that include high mobility application scenarios such as high-speed trains, and vehicle-to-vehicle and vehicle-toinfrastructure communications. The dynamic nature of wireless channels in such scenarios makes them doubly-dispersive in nature. Orthogonal time frequency space (OTFS) modulation is a recent two-dimensional (2D) modulation technique specially suited for doubly-dispersive wireless channels. A fundamental feature of OTFS modulation is that the information symbols in OTFS modulation are multiplexed in

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15

Fernandes, Pedro Manuel de Azevedo Silva. "Platooning of IVC-enabled Autonomous Vehicles: Information and Positioning Management Algorithms, for High Traffic Capacity and Urban Mobility Improvement." Doctoral thesis, 2013. http://hdl.handle.net/10316/23352.

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Tese de doutoramento em Engenharia Eletrotécnica, na especialidade de Instrumentação e Controlo, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>Urban traffic congestion is one of the major problems our cities face nowadays. The main challenge is to improve road capacity and avoid traffic congestion, under high vehicle density. This thesis aims to contribute for urban mobility improvement, using platooning of IVC-enabled autonomous vehicles. This way, new intraplatoon information management strategies to deal with safe and stable operation are proposed, as we

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16

Patnaik, Akash. "Breakdown Voltage Analysis of High Electron Mobility Transistor." Thesis, 2018. http://ethesis.nitrkl.ac.in/9646/1/2018_MT_216EE1273_APatnaik_Breakdown.pdf.

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Since the invention of the metal-oxide-semiconductor field-effect-transistor (MOSFET), the semiconductor industry for electronics has been dominated by silicon (Si). The reason being the cost and ease of creating a native oxide on Si which enables the well established complementary metal-oxide-semiconductor (CMOS) process which has revolutionised the digital world we live in. Si, however,is a low band gap material (1.1 eV) and although used in power semiconductor sector over the years, new materials with superior properties are being investigated as poten

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17

Li, Wen-Ching, and 李文璟. "Carrier Frequency Offset Estimation by Applying Hierarchical Modulations for MIMO-OFDM System in High Mobility Communication." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40055059543722690290.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>98<br>In this thesis, we address the estimation of carrier frequency offset (CFO) in the orthogonal frequency division multiplexing (OFDM) based on multiple input multiple output (MIMO) communication system. The basic principle of OFDM is to convert a wideband frequency-selective channel into numerous narrow-band flat-fading subchannels. On the other hand, MIMO techniques boost the performance under flat-fading channels for wireless communications significantly. By combining the features of OFDM and MIMO, the MIMO-OFDM techniques can achieve better performance in hi

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18

Mapoka, Trust T., Haider M. AlSabbagh, Yousef A. S. Dama, et al. "A multi-service cluster-based decentralized group key management scheme for high mobility users." 2015. http://hdl.handle.net/10454/9189.

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No<br>Previous cluster based group key management schemes for wireless mobile multicast communication lack efficiency in rekeying the group key if high mobility users concurrently subscribe to multiple multicast services that co-exist in the same network. This paper proposes an efficient multi-service group key management scheme suitable for high mobility users which perform frequent handoffs while participating seamlessly in multiple multicast services. The users are expected to drop subscriptions after multiple cluster visits hence inducing huge key management overhead due to rekeying the pr

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19

Wu, Bing-Syue, and 吳秉學. "A Resource Allocation Scheme for Device-to-Device Communication with High Mobility and Density in the Urban Cellular for 5G Network." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/kx74m3.

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碩士<br>國立中興大學<br>資訊科學與工程學系<br>104<br>In order to improve system capacity and spectrum efficiency, device-to-device (D2D) Communication is used. It reuses the resource of cellular network which is allocated by the base station (BS). I consider D2D Communication with high density in the urban. In this scenario, the BS frequently reallocates the resource to the devices. It increases the delay time of the resource allocation and decreases the system throughput as well as increasing system overloading. Most of research allocated the resource to the cellular user equipment (CUE) before the D2D user

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