Empirical multi-band characterization of propagation with modelling aspects for communictions

Diese Arbeit präsentiert eine empirische Untersuchung der Wellenausbreitung für drahtlose Kommunikation im Millimeterwellen- und sub-THz-Band, wobei als Referenz das bereits bekannte und untersuchte sub-6-GHz-Band verwendet wird. Die großen verfügbaren Bandbreiten in diesen hohen Frequenzbändern erlauben die Verwendung hoher instantaner Bandbreiten zur Erfüllung der wesentlichen Anforderungen zukünftiger Mobilfunktechnologien (5G, “5G and beyond” und 6G). Aufgrund zunehmender Pfad- und Eindringverluste bei zunehmender Trägerfrequenz ist die resultierende Abdeckung dabei jedoch stark reduziert. Die entstehenden Pfadverluste können durch die Verwendung hochdirektiver Funkschnittstellen kompensiert werden, wodurch die resultierende Auflösung im Winkelbereich erhöht wird und die Notwendigkeit einer räumlichen Kenntnis der Systeme mit sich bringt: Woher kommt das Signal? Darüber hinaus erhöhen größere Anwendungsbandbreiten die Auflösung im Zeitbereich, reduzieren das small-scale Fading und ermöglichen die Untersuchung innerhalb von Clustern von Mehrwegekomponenten. Daraus ergibt sich für Kommunikationssysteme ein vorhersagbareres Bild im Winkel-, Zeit- und Polarisationsbereich, welches Eigenschaften sind, die in Kanalmodellen für diese Frequenzen widergespiegelt werden müssen. Aus diesem Grund wurde in der vorliegenden Arbeit eine umfassende Charakterisierung der Wellenausbreitung durch simultane Multibandmessungen in den sub-6 GHz-, Millimeterwellen- und sub-THz-Bändern vorgestellt. Zu Beginn wurde die Eignung des simultanen Multiband-Messverfahrens zur Charakterisierung der Ausbreitung von Grenzwert-Leistungsprofilen und large-scale Parametern bewertet. Anschließend wurden wichtige Wellenausbreitungsaspekte für die Ein- und Multibandkanalmodellierung innerhalb mehrerer Säulen der 5G-Technologie identifiziert und Erweiterungen zu verbreiteten räumlichen Kanalmodellen eingeführt und bewertet, welche die oben genannten Systemaspekte abdecken.This thesis presents an empirical characterization of propagation for wireless communications at mm-waves and sub-THz, taking as a reference the already well known and studied sub-6 GHz band. The large blocks of free spectrum available at these high frequency bands makes them particularly suitable to provide the necessary instantaneous bandwidths to meet the requirements of future wireless technologies (5G, 5G and beyond, and 6G). However, isotropic path-loss and penetration-loss are larger with increasing carrier frequency, hence, coverage is severely reduced. Path-loss can be compensated with the utilization of highly directive radio-interfaces, which increases the resolution in the angular domain. Nonetheless, this emphasizes the need of spatial awareness of systems, making more relevant the question “where does the signal come from?” In addition, larger application bandwidths increase the resolution in the time domain, reducing small-scale fading and allowing to observe inside of clusters of multi-path components (MPCs). Consequently, communication systems have a more deterministic picture of the environment in the angular, time, and polarization domain, characteristics that need to be reflected in channel models for these frequencies. Therefore, in the present work we introduce an extensive characterization of propagation by intensive simultaneous multi-band measurements in the sub-6 GHz, mm-waves, and sub-THz bands. Firstly, the suitability of the simultaneous multi-band measurement procedure to characterize propagation from marginal power profiles and large-scale parameters (LSPs) has been evaluated. Then, key propagation aspects for single and multi-band channel modelling in several verticals of 5G have been identified, and extensions to popular spatial channel models (SCMs) covering the aforementioned system aspects have been introduced and evaluated

An Empirical Analysis to Control Product Counterfeiting in the Automotive Industry\u27s Supply Chains in Pakistan

The counterfeits pose significant health and safety threat to consumers. The quality image of firms is vulnerable to the damage caused by the expanding flow of counterfeit products in today’s global supply chains. The counterfeiting markets are swelling due to globalization and customers’ willingness to buy counterfeits, fueling illicit activities to explode further. Buyers look for the original parts are deceived by the false (deceptive) signals’ communication. The counterfeiting market has become a multi-billion industry but lacks detailed insights into the supply side of counterfeiting (deceptive side). The study aims to investigate and assess the relationship between the anti-counterfeiting strategies and improvement in the firm’s supply performance within the internal and external supply chain quality management context in the auto-parts industry’s supply chains in Pakistan

Into the Woods: A Biologic Patent Thicket Analysis

Some drug companies, brand biologic companies, in particular, have been accused of covering only a single drug with more than eighty patents. These drug patents accumulate to what critics claim as one of the major culprits of high drug prices— “patent thickets.” However, current literature mostly focuses on the substantial patent counts and less on the characteristics and the causes of these patent thickets; but to effectively understand and tackle this issue, more thorough discussions are necessary. This article aims to provide further insight into this issue by analyzing and comparing the U.S. patents that cover top-selling biologics and small-molecule drugs. Results not only confirm the existence of biologic patent thickets—in which two of the three selected top-selling biologics have accumulated more than forty patents— but also show that more patents cover biologics than small-molecule drugs. Based on more in-depth analysis, this article further argues that the so-called “patent thicket” is, in fact, a cooperative effort of two types of patent thickets—Type I and Type II—that should be distinguished due to their differences in nature and the causes that give rise to them. Defined as large numbers of non-overlapping or inventive patents that cover different aspects of the drug, Type I Patent Thickets are formed due to the complex nature of biologics and biosimilars. Type II Patent Thickets, on the other hand, are arguably overlapping or non-inventive patents that are prone to double patenting. They cover the same aspect of the drug and owe their existence to the utilization of terminal disclaimers. The two types of patent thickets jointly contribute to the large number of patents that fend off patent challenges; the stretched year spans of collective patent terms that delay biosimilar entry; and the exorbitant drug prices that harm patients. In order to prevent the negative impacts of patent thickets without completely sacrificing the merits patents themselves provide, this article presents two proposals: one being the election of patents to assert to mitigate the adverse effects of Type II Patent Thickets, and the other being a more transformative reform that would target against both types of patent thickets

Intellectual Property in the Uruguay Round- Negotiating Strategies of the Western Industrialized Countries

The purpose of this article is not simply to add just another opinion to the debate on international IP protection. Nor does it aim to rally blind support for the position of the Western industrialized countries. Rather, this report attempts to present an objective analysis of all the important arguments of the developed and developing countries, and to evaluate in like manner all major aspects of traditional IP protection and potential regulation in GATT