iPhoneAlle anzeigen
iPhone 11iPhone 11 ProiPhone 11 Pro MaxiPhone 12iPhone 12 ProiPhone 12 Pro MaxiPhone 12 miniiPhone 13iPhone 13 ProiPhone 13 Pro MaxiPhone 13 miniiPhone 14iPhone 14 PlusiPhone 14 ProiPhone 14 Pro MaxiPhone 15iPhone 15 PlusiPhone 15 ProiPhone 15 Pro MaxiPhone 16iPhone 16 PlusiPhone 16 ProiPhone 16 Pro MaxiPhone 16eiPhone 5iPhone 5CiPhone 5SiPhone 6iPhone 6 PlusiPhone 6SiPhone 6S PlusiPhone 7iPhone 7 PlusiPhone 8iPhone 8 PlusiPhone SEiPhone SE 2020iPhone SE 2022iPhone XiPhone XRiPhone XSiPhone XS Max
NokiaAlle anzeigen
108 Reihe220 Reihe225 Reihe2600 classic Reihe2680 slide Reihe2710 Reihe3120 classic Reihe3220 Reihe500 Reihe515 Reihe5230 Reihe603 Reihe6131 Reihe6200 Reihe6300 Reihe6500 Reihe6700 Reihe700 Reihe7200 Reihe8310 ReiheAshaC1C2C3C5C6C7E51E52E6E63E65E7E71E72N73N8N9N95N97Nokia 3Nokia 4.2Nokia 5Nokia 6Nokia 7Nokia 8SiroccoWeitere ModelleXX2X3X6XLXpressMusic
Galaxy A-SerieAlle anzeigen
Galaxy A12Galaxy A13Galaxy A13 5GGalaxy A14Galaxy A15Galaxy A16Galaxy A17Galaxy A17 5GGalaxy A20eGalaxy A21Galaxy A22Galaxy A23Galaxy A24Galaxy A25Galaxy A26 5GGalaxy A27 5GGalaxy A3Galaxy A32Galaxy A33Galaxy A34Galaxy A35Galaxy A36 5GGalaxy A37Galaxy A40Galaxy A41Galaxy A42Galaxy A50Galaxy A51Galaxy A52Galaxy A53Galaxy A54Galaxy A55Galaxy A56 5GGalaxy A57 5GGalaxy A70Galaxy A71Galaxy A72
Redmi SeriesAlle anzeigen
Redmi 10Redmi 13CRedmi 15 5GRedmi Note 10Redmi Note 10 ProRedmi Note 11Redmi Note 11 ProRedmi Note 11 Pro Plus 5GRedmi Note 11sRedmi Note 12Redmi Note 12 5GRedmi Note 12 ProRedmi Note 12 Pro 5GRedmi Note 12 Pro PlusRedmi Note 13Redmi Note 13 5GRedmi Note 13 ProRedmi Note 13 Pro PlusRedmi Note 14Redmi Note 14 Pro PlusRedmi Note 15Redmi Note 15 5GRedmi Note 15 ProRedmi Note 15 Pro 5GRedmi Note 15 Pro Plus 5GRedmi Note 8Redmi Note 8 ProRedmi Note 9Redmi Note 9 Pro
- Startseite
Bücher Wissen & Bildung Englische Bücher Naturwissenschaft, Medizin, Informatik, Technik Technik Elektronik, Elektro- und Nachrichtentechnik The 60 GHz Indoor Radio Channel – Overcoming the Challenges of Human Blockage
Derzeit nicht verfügbar
Handgeprüfte Gebrauchtware
Bis zu 50 % günstiger als neu
21 Tage Widerrufsrecht
The 60 GHz Indoor Radio Channel – Overcoming the Challenges of Human Blockage
Martin Jacob (Broschiert, Englisch)
Optischer Zustand
Beschreibung
Driven by the ever increasing capacity of storage devices and HD video streaming applications, there will be a strong demand for wireless multi-Gbps consumer applications soon. Due to its large available bandwidth and the high allowed transmit power, the unlicensed frequency range around 60 GHz is proving ideal for the realization of such systems. During the development process of 60 GHz… multi-gigabit wireless systems, a detailed knowledge of the radio channel is essential. Taking into account research gaps, this dissertation makes a significant contribution to knowledge in the field of 60 GHz channel characterization. The focus is on human shadowing and its influence on the channel characteristics, which leads to a high and time-variant path loss.
In order to provide realistic results, sophisticated radio channel models are required for the 60 GHz range. In particular, they should include information in the spatial domain at the receiver and the transmitter as well as take into account time-varying human shadowing. The angular information is necessary in this case to evaluate smart antenna systems. Such comprehensive models are not yet available and therefore represent a major outcome of this dissertation. Various propagation scenarios with stationary transmitters and receivers are analyzed. The time-invariant properties are modeled utilizing a deterministic ray tracing tool. In order to validate and calibrate the tool extensive broadband channel measurements are performed. At the same time, these measurements provide information about the radio channel with respect to the angle of arrival and angle of departure properties. In addition, a the relevance of diffraction effects in the mm-wave range is studied, based on both propagation measurements as well as ray tracing simulations. Furthermore, different electromagnetic models to describe the human shadowing are analyzed in a comparative study as well as validated by measurements. Here, a self developed model should be highlighted, which is based on knife edge diffraction. It is characterized by a good agreement with measurement results and a very low computational effort. Together with the ray tracing simulator it provides a broadband time-variant deterministic channel model.
In order to make the results directly applicable for future research, stochastic models are developed in the thesis, namely a semi-static and a fully time-variant approach. The first-mentioned model is based entirely on simulation data of the deterministic approach mentioned above. The second model combines empirically obtained data from shadowing measurements with ray tracing simulation in a hybrid approach. Both complement the time-invariant cluster-based IEEE802.11ad radio channel model. The models reproduce the influence of human activity and consider up to ten people. Especially the time-variant model is the first wideband model of its kind in the 60 GHz range.
In addition to the radio channel investigations, antenna diversity concepts reducing the impairments of human shadowing are analyzed. For this purpose, the validated deterministic approach mentioned above is utilized. Finally, taking into consideration the requirements of the overall transmission system, it is demonstrated that macro diversity and beamforming is an effective countermeasure to human shadowing. Dieses Produkt haben wir gerade leider nicht auf Lager.
Handgeprüfte Gebrauchtware
Bis zu 50 % günstiger als neu
21 Tage Widerrufsrecht
Technische Daten
Erscheinungsdatum
22.04.2014
Sprache
Englisch
EAN
9783844027143
Herausgeber
Shaker
Serien- oder Bandtitel
Mitteilungen aus dem Institut für Nachrichtentechnik der Technischen Universität Braunschweig
Sonderedition
Nein
Autor
Martin Jacob
Seitenanzahl
181
Auflage
1
Einbandart
Broschiert
Auf gebrauchten Artikeln oder Originalverpackungen sichtbare Umwelt-, Nachhaltigkeits- oder Zertifizierungsangaben stammen aus der ursprünglichen Herstellerkennzeichnung. Sie stellen keine eigene aktuelle Umwelt- oder Nachhaltigkeitsaussage von rebuy dar. Maßgeblich für das Angebot sind ausschließlich die von rebuy in der Artikelbeschreibung angegebenen Produkteigenschaften.
-.-
★★★★★
☆☆☆☆☆ Leider noch keine Bewertungen
Leider noch keine Bewertungen
Sicher bei rebuy kaufen
Schreib die erste Bewertung für dieses Produkt!
Wenn du eine Bewertung für dieses Produkt schreibst, hilfst du allen Kund:innen, die noch überlegen, ob sie das Produkt kaufen wollen. Vielen Dank, dass du mitmachst!
Sicher bei rebuy kaufen