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Biblioteca

MARC Lista (tabellare)
"8802-11-2022 - ISO/IEC/IEEE - International Standard - Telecommunications and information exchange between systems - Specific requirements for local and metropolitan area networks . Part 11 : Wireless LAN medium access control (MAC) and physical layer (PHY) specifications" / / IEEE
"8802-11-2022 - ISO/IEC/IEEE - International Standard - Telecommunications and information exchange between systems - Specific requirements for local and metropolitan area networks . Part 11 : Wireless LAN medium access control (MAC) and physical layer (PHY) specifications" / / IEEE
Pubbl/distr/stampa New York : , : IEEE, , 2022
Descrizione fisica 1 online resource (4382 pages)
Disciplina 004.68
Soggetto topico Wireless LANs
Beamforming
Telecommunication
ISBN 1-5044-9121-1
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNISA-996574993903316
New York : , : IEEE, , 2022
Materiale a stampa
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Beamforming antennas in wireless networks : multihop and millimeter wave communication networks / / Osama Bazan, Baha Uddin Kazi, Muhammad Jaseemuddin
Beamforming antennas in wireless networks : multihop and millimeter wave communication networks / / Osama Bazan, Baha Uddin Kazi, Muhammad Jaseemuddin
Autore Bazan Osama
Pubbl/distr/stampa Cham, Switzerland : , : Springer, , [2021]
Descrizione fisica 1 online resource (128 pages)
Disciplina 621.3822
Collana SpringerBriefs in electrical and computer engineering
Soggetto topico Beamforming
ISBN 3-030-77459-7
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Intro -- Contents -- 1 Introduction -- 1.1 Wireless Networks -- 1.2 Beamforming Antennas: A Promising Technology -- 1.2.1 Potential Benefits -- 1.2.2 Challenges in the Upper Layers -- 1.3 Organization of the Book -- References -- 2 Overview of Beamforming Antennas -- 2.1 Fundamentals -- 2.2 Smart Antennas Technology -- 2.2.1 Beamforming Antennas -- 2.2.2 MIMO Systems -- 2.3 Types of Beamforming Antennas -- 2.3.1 Switched Beam Antenna Systems -- 2.3.2 Steered Beam Antenna Systems -- 2.4 Millimeter Wave Beamforming -- References -- 3 MAC Issues -- 3.1 Medium Access Control with Omni-Directional Antennas -- 3.2 MAC Challenges with Beamforming Antennas -- 3.2.1 Deafness -- 3.2.2 New Hidden Terminals -- 3.2.3 Head-of-Line Blocking -- 3.2.4 Communication Range Under-Utilization -- 3.2.5 MAC-Layer Capture -- References -- 4 Directional MAC -- 4.1 Directional MAC Design Choices -- 4.1.1 Transmission Mode of RTS/CTS Packets -- 4.1.2 Virtual Carrier Sensing -- 4.1.3 Idle Listening Mode -- 4.1.4 Backoff -- 4.1.5 Beamforming Information -- 4.1.6 Tones -- 4.1.7 Synchronized Access -- 4.2 Overview of Directional MAC Protocols -- 4.2.1 Classification -- 4.2.2 Random Access Protocols -- 4.2.3 Synchronized Access Protocols -- 4.3 Basic Directional MAC (DMAC) -- 4.3.1 DMAC with Omni-Directional Backoff -- 4.4 Circular Directional RTS MAC (CDR) -- 4.5 Opportunistic Directional MAC (OPMAC) -- 4.5.1 Main Design Considerations -- 4.5.2 Protocol Description -- 4.5.3 Performance Evaluation -- References -- 5 Enhanced MAC for Millimeter Wave Communication -- 5.1 Introduction -- 5.2 Beacon Frame -- 5.3 Enhanced Distributed Channel Access (EDCA) -- 5.4 Multiple Channel Access -- 5.5 Cooperative MAC Protocol -- 5.5.1 Contention Free Cooperative MAC Protocol -- 5.5.2 Contention-Based Cooperative MAC Protocol -- 5.6 Dual-Band MAC Protocol.
5.7 Pre-defined Virtual Grouping MAC Protocol -- References -- 6 Directional Routing -- 6.1 Introduction -- 6.2 Neighbor Discovery -- 6.3 Route Discovery -- 6.3.1 Route Discovery Optimization -- 6.4 Directional Routing Schemes -- 6.4.1 Directional DSR (DDSR) -- 6.4.2 Directional Routing Protocol (DRP) -- 6.4.3 Zone Disjoint Routing (ZDR) -- 6.4.4 DSR with Directional Antenna for Partition Bridging -- 6.4.5 Capture-Aware Routing -- References -- 7 Directional QoS Routing Framework -- 7.1 QoS Guarantees in Multi-hop Wireless Networks -- 7.1.1 QoS Routing with Contention-Free MAC -- 7.1.2 QoS Routing with Contention-Based MAC -- 7.2 Conflict Analysis Framework -- 7.2.1 System Model -- 7.2.2 Classification of Link Conflicts -- 7.2.3 Colored Conflict Graph -- 7.3 QoS Routing Problem -- 7.3.1 Problem Formulation -- 7.3.2 Probability of Successful Transmission PS(i, j) -- 7.3.3 QoS Routing Algorithm -- 7.4 Performance Evaluation -- References -- 8 Open Research Areas -- 8.1 Cross Layer Design for Directional MAC and Routing -- 8.2 Multi-hop Wireless Networks with Heterogeneous Antennas -- 8.3 Using Beamforming Antennas in Indoor Environments -- 8.4 Analytical Modeling for Directional MAC -- 8.5 QoS-Aware Directional Routing Protocols -- 8.6 Joint Optimization of Different Physical Layer Capabilities -- 8.7 Research Issues for mmWave WLAN -- References.
Record Nr. UNINA-9910491024103321
Bazan Osama  
Cham, Switzerland : , : Springer, , [2021]
Materiale a stampa
Lo trovi qui: Univ. Federico II
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Evaluating the Acoustic effect of over-the-rotor Foam-Metal Liner installed on a low speed fan using Virtual Rotating Microphone imaging [[electronic resource] /] / Daniel L. Sutliff, Robert P. Dougherty, Bruce E. Walker ; prepared for the 16th Aeroacoustics Conference cosponsored by the American Institute of Aeronautics and Astronautics and the Confederation of European Aerospace Societies, Stockholm, Sweden, June 7-9, 2010
Evaluating the Acoustic effect of over-the-rotor Foam-Metal Liner installed on a low speed fan using Virtual Rotating Microphone imaging [[electronic resource] /] / Daniel L. Sutliff, Robert P. Dougherty, Bruce E. Walker ; prepared for the 16th Aeroacoustics Conference cosponsored by the American Institute of Aeronautics and Astronautics and the Confederation of European Aerospace Societies, Stockholm, Sweden, June 7-9, 2010
Autore Sutliff Daniel L (Daniel Linden), <1962->
Pubbl/distr/stampa Cleveland, Ohio : , : National Aeronautics and Space Administration, Glenn Research Center, , [2010]
Descrizione fisica 1 online resource (13 pages) : illustrations, color
Altri autori (Persone) DoughertyRobert P
WalkerBruce E
Collana NASA/TM
Soggetto topico Beamforming
Broadband
Noise reduction
Phased arrays
Test stands
Annular ducts
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910699905403321
Sutliff Daniel L (Daniel Linden), <1962->  
Cleveland, Ohio : , : National Aeronautics and Space Administration, Glenn Research Center, , [2010]
Materiale a stampa
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Hybride Beamformingsysteme niedriger Komplexität für den Mobilfunk / / Jörg Eisenbeis
Hybride Beamformingsysteme niedriger Komplexität für den Mobilfunk / / Jörg Eisenbeis
Autore Eisenbeis Jörg
Pubbl/distr/stampa Karlsruhe : , : KIT Scientific Publishing, , 2022
Descrizione fisica 1 online resource (xxix, 239 pages) : illustrations
Disciplina 621.381
Soggetto topico Beamforming
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione ger
Nota di contenuto Vorwort des Herausgebers i -- Zusammenfassung . iii -- Vorwort v -- Abkürzungen und Symbole xi -- 1 Mobilfunksysteme der Zukunft 1 -- 1.1 Trends zukünftiger Mobilfunkkommunikationssysteme . 3 -- 1.1.1 Small Cells . 3 -- 1.1.2 Zentimeter- und Millimeterwellen . 5 -- 1.1.3 Mehrantennenkommunikationssysteme 6 -- 1.2 Mehrantennensysteme niedriger Komplexität 9 -- 1.3 Zielsetzung und Gliederung der Dissertation . 13 -- 2 MIMO-Signaltheorie und Kanalmodellierung 17 -- 2.1 Mehrantennenkommunikationssysteme 17 -- 2.1.1 Beschreibung von Antennenarraysystemen 18 -- 2.1.2 Signaltheorie zu Mehrantennensystemen . 20 -- 2.1.3 MIMO-OFDM-Signalverarbeitung 27 -- 2.2 Kanalcharakterisierung und -modellierung bei 28 GHz . 30 -- 2.2.1 Kanalmesssysteme . 31 -- 2.2.2 Dämpfungsfaktoren des drahtlosen Übertragungskanals 32 -- 2.2.3 Dynamische Ausbreitungseffekte . 37 -- 2.2.4 MIMO-Kanalmodellierung . 39 -- 2.3 Zusammenfassung zu Kapitel 2 43 -- 3 MIMO-Kanalmesssystem bei 28 GHz 45 -- 3.1 Realisierungen von Kanalmesssystemen . 46 -- 3.2 MIMO-Kanalmesssystem 47 -- 3.2.1 Systemaufbau 48 -- 3.2.2 Kanalschätzungsprinzip 53 -- 3.2.3 Kalibrierungsprinzip und Validierung des Kanalmesssystems . 55 -- 3.3 Ergebnisse der Kanalmesskampagnen . 59 -- 3.3.1 Messszenarien 60 -- 3.3.2 Analyse des 28 GHz-Übertragungskanals . 61 -- 3.4 Zusammenfassung zu Kapitel 3 68 -- 4 Hybride Beamformingarchitekturen und -algorithmen 71 -- 4.1 Grundlagen hybrider Beamformingsysteme 71 -- 4.2 Hybride Beamformingarchitekturen niedriger Komplexität 76 -- 4.2.1 Subarray-basierte hybride Beamformingsysteme . 77 -- 4.2.2 Subarray-basierte hybride Beamformingsysteme mit Schaltern 89 -- 4.2.3 Subarray-basierte hybride Beamformingsysteme -- mit zusätzlichen Freiheitsgraden . 91 -- 4.3 Energieeffizienz hybrider Beamformingarchitekturen 96 -- 4.4 Vergleich hybrider Beamformingarchitekturen 98 -- 4.4.1 Numerische Analyse mittels PBCM 99 -- 4.4.2 Untersuchung anhand gemessener Übertragungskanäle 105 -- 4.4.3 Effizienzbetrachtung des MIMO-Demonstrators . 108 -- 4.5 Zusammenfassung zu Kapitel 4 112 -- 5 Kanalschätzungsmethoden für hybride Beamformingsysteme 115 -- 5.1 Aktuelle Forschung zu MIMO-Kanalschätzungsverfahren 116 -- 5.1.1 Grundprinzipien der MIMO-Kanalschätzung 116 -- 5.1.2 Suchverfahren 117 -- 5.1.3 Ausnutzung gewonnener Kanalinformationen in niedrigeren Frequenzbereichen . 120 -- 5.1.4 Suchoptimierung durch räumliche Positionsdaten 121 -- 5.1.5 Komprimierte Erfassung dünnbesetzter Übertragungskanäle . 121 -- 5.2 Hierarchische Suchverfahren 123 -- 5.3 Kanalschätzung mittels dünnbesetzter Antennenarrays . 126 -- 5.3.1 SABA-Verfahren 128 -- 5.3.2 MSAM-Verfahren 131 -- 5.3.3 Rekonstruktion der MIMO-Kanalmatrix basierend auf zuschaltbaren Bandpassfiltern 133 -- 5.3.4 Kombination des MSAM- und SABA-Verfahrens 135 -- 5.4 Vergleich der Kanalschätzverfahren 135 -- 5.4.1 Berechnung und Vergleich der Kanalschätzungsdauer 136 -- 5.4.2 Numerischer Vergleich mittels PBCM 142 -- 5.4.3 Untersuchung anhand gemessener Übertragungskanäle 149 -- 5.5 Zusammenfassung zu Kapitel 5 154 -- 6 Messtechnische Analyse eines Subarray-basierten hybriden Beamformingsystems . 157 -- 6.1 Subarray-basierter hybrider Beamforming-Empfänger 157 -- 6.1.1 Systemdesign 158 -- 6.1.2 Kalibrierungsverfahren . 160 -- 6.2 Messtechnische Untersuchung der Kanalschätzungsverfahren 167 -- 6.2.1 Konstruktion und Vermessung hierarchischer Codebücher 167 -- 6.2.2 Messaufbau zur Untersuchung von Winkelschätzverfahren 170 -- 6.2.3 Trennbarkeit in Mehrwegeszenarien mittels hierarchischer Suchverfahren 171 -- 6.2.4 Winkelfehleranalyse der Kanalschätzungsverfahren in Mehrnutzerszenarien 174 -- 6.3 Zusammenfassung zu Kapitel 6 177 -- 7 Schlussfolgerungen 179 -- A Anhang zum MIMO-Kanalmesssystem . 183 -- A.1 HF-Frontend Design und Integration . 183 -- A.2 Berechnung des Azimutwinkels 185 -- A.3 Messszenarien 187 -- A.4 Metriken zur Kanalanalyse 188 -- A.5 Analyse des zeitlichen Verhaltens des Übertragungskanals 189 -- B Anhang zu den Kanalschätzungsmethoden 193 -- B.1 Beispiel von Sektorcodebüchern für lineare Antennenarrays . 193 -- B.2 Anfälligkeit des MSAM-Verfahrens auf Phasenänderungen 194 -- B.3 Richtcharakteristiken der hierarchischen Codebücher für -- 2D-Antennenarrays . 196 -- Literaturverzeichnis 199 -- Eigene Veröffentlichungen 235 -- Journalartikel . 235 -- Konferenzbeiträge 236.
Record Nr. UNINA-9910591162703321
Eisenbeis Jörg  
Karlsruhe : , : KIT Scientific Publishing, , 2022
Materiale a stampa
Lo trovi qui: Univ. Federico II
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Identification of noise sources during rocket engine test firings and a rocket launch using a microphone phased-array / / Jayanta Panda, Robert N. Mosher, Barry J. Porter
Identification of noise sources during rocket engine test firings and a rocket launch using a microphone phased-array / / Jayanta Panda, Robert N. Mosher, Barry J. Porter
Autore Panda J (Jayanta)
Pubbl/distr/stampa Moffett Field, CA : , : National Aeronautics and Space Administration, Ames Research Center, , December 2013
Descrizione fisica 1 online resource (20 pages) : color illustrations
Collana NASA/TM
Soggetto topico Rocket engines
Phased arrays
Test firing
Aeroacoustics
Beamforming
Sound pressure
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910703411203321
Panda J (Jayanta)  
Moffett Field, CA : , : National Aeronautics and Space Administration, Ames Research Center, , December 2013
Materiale a stampa
Lo trovi qui: Univ. Federico II
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Interferometer control of optical tweezers / / Arthur J. Decker
Interferometer control of optical tweezers / / Arthur J. Decker
Autore Decker Arthur J (Arthur John), <1941->
Pubbl/distr/stampa Cleveland, Ohio : , : National Aeronautics and Space Administration, Glenn Research Center, , June 2002
Descrizione fisica 1 online resource (8 pages) : illustrations
Collana NASA/TM
Soggetto topico Interferometers
Light modulators
Optical control
Beamforming
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910705700903321
Decker Arthur J (Arthur John), <1941->  
Cleveland, Ohio : , : National Aeronautics and Space Administration, Glenn Research Center, , June 2002
Materiale a stampa
Lo trovi qui: Univ. Federico II
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ITG-Fb. 300: WSA 2021 : 25th International ITG Workshop on Smart Antennas 10-12 November 2021, French Riviera, Hybrid Event
ITG-Fb. 300: WSA 2021 : 25th International ITG Workshop on Smart Antennas 10-12 November 2021, French Riviera, Hybrid Event
Edizione [Neuerscheinung]
Pubbl/distr/stampa Berlin, : VDE Verlag, 2021
Descrizione fisica Online-Ressource (475 S.)
Collana ITG-Fachberichte
Soggetto topico Machine Learning
Wireless communication systems
Beamforming
Smart Antennas
Wireless sensor networks
Channel Modelling
Cloud Radio Access Networks
C-RAN (Cloud-RAN)
Centralized-RAN
Massive/Full-Dimension MIMO
Network/Distributed MIMO
Ultra-Low Latency Communications
ISBN 1-5231-5480-2
3-8007-5688-9
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNISA-996577925503316
Berlin, : VDE Verlag, 2021
Materiale a stampa
Lo trovi qui: Univ. di Salerno
Opac: Controlla la disponibilità qui
ITG-Fb. 300: WSA 2021 : 25th International ITG Workshop on Smart Antennas 10-12 November 2021, French Riviera, Hybrid Event
ITG-Fb. 300: WSA 2021 : 25th International ITG Workshop on Smart Antennas 10-12 November 2021, French Riviera, Hybrid Event
Edizione [Neuerscheinung]
Pubbl/distr/stampa Berlin, : VDE Verlag, 2021
Descrizione fisica Online-Ressource (475 S.)
Collana ITG-Fachberichte
Soggetto topico Machine learning
Wireless communication systems
Beamforming
Smart Antennas
Wireless sensor networks
Channel Modelling
Cloud Radio Access Networks
C-RAN (Cloud-RAN)
Centralized-RAN
Massive/Full-Dimension MIMO
Network/Distributed MIMO
Ultra-Low Latency Communications
ISBN 9781523154807
1523154802
9783800756889
3800756889
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910873964303321
Berlin, : VDE Verlag, 2021
Materiale a stampa
Lo trovi qui: Univ. Federico II
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Power, avionics and software communication network architecture / / William D. Ivancic [and six others]
Power, avionics and software communication network architecture / / William D. Ivancic [and six others]
Autore Ivancic William D.
Pubbl/distr/stampa Cleveland, Ohio : , : National Aeronautics and Space Administration, Glenn Research Center, , February 2014
Descrizione fisica 1 online resource (32 pages) : color illustrations
Collana NASA/TM
Soggetto topico Communication networks
Extravehicular mobility units
Video communication
Beamforming
International Space Station
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910703641303321
Ivancic William D.  
Cleveland, Ohio : , : National Aeronautics and Space Administration, Glenn Research Center, , February 2014
Materiale a stampa
Lo trovi qui: Univ. Federico II
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Principles of waveform diversity and design / / Michael C. Wicks ... [et al.]
Principles of waveform diversity and design / / Michael C. Wicks ... [et al.]
Pubbl/distr/stampa Raleigh, NC, : SciTech Pub., c2010
Descrizione fisica 1 online resource (1230 p.)
Disciplina 621.384
Altri autori (Persone) WicksMichael C
Soggetto topico Antenna radiation patterns
Beamforming
Radar
Radio waves
Signal processing
ISBN 1-61353-150-8
1-61344-157-6
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Dedication: P. M.Woodward and the Ambiguity Function, Lars Falk; Introduction: A Short History of Waveform Diversity, Eric L. Mokole and Michael C. Wicks; Section A: Waveform Diversity Paradigms; 1. Diversity Strategies: Lessons from Natural Systems, Michele Vespe, Gareth Jones, and Chris J. Baker; 2. Distributed and Layered Sensing, Michael C. Wicks and William Moore; 3. Waveform Diversity and Sensors as Robots in Advanced Military Systems, Donald D. Weiner, Michael C. Wicks, and Gerard T. Capraro
4. Implications of Diversity from a Sensing Point of View, Tapan K. Sarkar, Santana Burintramart, N. Yllmazer, Y. Zhang, Arijit De, Magdalena Salazar-Palma, M.A. Lagunas, Eric L. Mokole, and M.C. WicksSection B: Applications; Part I: Multi-mission Systems; 5. An Evolutionary Algorithm Approach to Simultaneous Multi-Mission Radar Waveform Design, Vincent J. Amuso and Jason Enslin; 6. Interlacing of Non-Uniform Doppler Waveforms and MetricSpace Geometry of Negative Curvature, F. Barbaresco
7. Evolutionary Algorithms Based Sparse SpectrumWaveform Optimization, Weixian Liu, Y. L. Lu, and Marc Lesturgie8. Intra-Pulse Radar-Embedded Communications, Shannon D. Blunt and James M. Stiles; 9. Waveform Design for Joint Digital Beamforming Radar and MIMO Communications Operability, Christian Sturm and Werner Wiesbeck; 10. A Transform Domain Communication and Jamming Waveform, Abel Nunez, Vasu Chakravarthy, and James Caldwell; 11. Optimal Space-Time Transmit Signals for Multi-Mode Radar, Jim Stiles and Vishal Sinha; Part II: Long-Range Active Sensing
12. Waveform Diversity and Adaptive Signal Processing to Improve SBR GMTI Performance Degraded by MEO Antenna Mechanical Distortions, Richard S. Pierro, Scott E. Parker, Richard Schneible, Yuhong Zhang, and Abdelhak Hajjari13. Multidimensional Waveform Encoding for Spaceborne Synthetic Aperture Radar Remote Sensing, Gerhard Krieger, Nicolas Gebert, and Alberto Moreira; 14. Time Reversed Over-The-Horizon Radar, Eung G. Paek, Joon Y. Choe, and Eric L. Mokole; 15. Issues with Orthogonal Waveform Use in MIMO HF OTH Radars, Ben A. Johnson, Gordon J. Frazer, and Yuri I. Abramovich
Part III: Distributed Aperture Sensing16. Waveform Diversity and Signal Processing Strategies in Multistatic Radar Systems, Ivan Bradaric, Gerard T. Capraro, and Michael C. Wicks; 17. A Framework for Optimal Code Design for MIMO Radar, Pinaki Ray and Langford White; 18. Space-Time Adaptive Processing for Frequency-Diverse Distributed Aperture Radars, Raviraj Adve, Earnest Lock, and Lorne Applebaum; 19. A Novel Waveform Diversity Model for Distributed Aperture Radars with Consideration on Environment Non-Stationarity, Luciano Landi and Raviraj S. Adve
20. Waveform Concepts and Design for Weather Radar Network, V. Chandrasekar and Nitin Bharadwaj
Record Nr. UNINA-9911006591903321
Raleigh, NC, : SciTech Pub., c2010
Materiale a stampa
Lo trovi qui: Univ. Federico II
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