Low Power Galileo Gps Single Shot Receiver Architecture For Mobile Terminals

Der Inhalt dieses Buches gibt die Ergebnisse der Arbeit im Rahmen meiner Dissertation wieder. Zum ersten Mal wurde im Rahmen der vorliegenden Forschungsarbeit die Funktionalität eines GNSS-Empfängers mit der Information eines Zeitsignals kombiniert. Die vorliegende Arbeit verwendet dazu die Eigenheiten des DCF77-Signals um eine hocheffiziente kombinierte Signalverarbeitung zu ermöglichen. Die Kombination von Zeitsynchronisations- und Navigationssignalen eliminiert den größten Nachteil klassischer Assisted-Empfängerarchitekturen, den massiven Einsatz von Rechenleistung in der digitalen Signalverarbeitung. Trotzdem bleiben die Vorteile der bekannten Architekturen, eine kurze Time-to-First-Fix bei geringem Stromverbrauch erhalten. Aufbauend auf der bekannten Architektur des Single-Shot-Empfängers erlaubt die Erweiterung um die Zeitinformation zusammen mit der bereits bekannten Navigationsnachricht und der geschätzten Position eine Vorausberechnung der zu erwartenden Satellitensignale. Die Vorausberechnung der Satellitensignale resultiert in einer Reduktion des Suchfensters für die Kodephase der Satellitensignale. Neben einer Beschreibung der Grundlagen der Satellitennavigation und der Übertragung von Zeitsignalen über Langwelle, werden in diesem Buch die entwickelte Architektur vorgestellt. Außerdem sind die Ergebnisse einer komplexen Systemsimulation, Teil dieses Buches.

This book covers multi-band Galileo receivers (especially E1-E5 bands of Galileo) and addresses all receiver building blocks, from the antenna and front end, through details of the baseband receiver processing blocks, up to the navigation processing, including the Galileo message structure and Position, Velocity, Time (PVT) computation. Moreover, hybridization solutions with communications systems for improved localization are discussed and an open-source GNSS receiver platform (available for download) developed at Tampere University of Technology (TUT) is addressed in detail.

Positioning in Wireless Communications Systems explains the principal differences and similarities of wireless communications systems and navigation systems. It discusses scenarios which are critical for dedicated navigation systems such as the Global Positioning System (GPS) and which motivate the use of positioning based on terrestrial wireless communication systems. The book introduces approaches for determination of parameters which are dependent on the position of the mobile terminal and also discusses iterative algorithms to estimate and track the position of the mobile terminal. Models for radio propagation and user mobility are important for performance investigations and assessments using computer simulations. Thus, channel and mobility models are explored, especially focussing on critical navigation environments like urban or indoor scenarios. Positioning in Wireless Communications Systems examines advanced algorithms such as hybrid data fusion of satellite navigation and positioning with wireless communications and cooperative positioning among mobile terminals.. The performance of the discussed positioning techniques are explored on the basis of already existing and operable terrestrial wireless communication systems such as GSM, UMTS, or LTE and it is shown how positioning issues are fixed in respective standards. Written by industry experts working at the cutting edge of technological development, the authors are well placed to give an excellent view on this topic, enabling in-depth coverage of current developments. Key features • Unique in its approach to dealing with a heterogeneous system approach, different cell structures and signal proposals for future communications systems • Covers hybrid positioning investigating how GNSS and wireless communications positioning complement each other • Applications and exploitation of positioning information are discussed to show the benefits of including this information in several parts of a wireless communications system

The Global Positioning System (GPS) has revolutionized the measurement of position, velocity, and time. It has rapidly evolved into a worldwide utility with more than a billion receiver sets currently in use that provide enormous benefits to humanity: improved safety of life, increased productivity, and wide-spread convenience. Global Navigation Satellite Systems summarizes the joint workshop on Global Navigation Satellite Systems held jointly by the U.S. National Academy of Engineering and the Chinese Academy of Engineering on May 24-25, 2011 at Hongqiao Guest Hotel in Shanghai, China. "We have one world, and only one set of global resources. It is important to work together on satellite navigation. Competing and cooperation is like Yin and Yang. They need to be balanced," stated Dr. Charles M. Vest, President of the National Academy of Engineering, in the workshop's opening remarks. Global Navigation Satellite Systems covers the objectives of the workshop, which explore issues of enhanced interoperability and interchangeability for all civil users aimed to consider collaborative efforts for countering the global threat of inadvertent or illegal interference to GNSS signals, promotes new applications for GNSS, emphasizing productivity, safety, and environmental protection. The workshop featured presentations chosen based on the following criteria: they must have relevant engineering/technical content or usefulness; be of mutual interest; offer the opportunity for enhancing GNSS availability, accuracy, integrity, and/or continuity; and offer the possibility of recommendations for further actions and discussions. Global Navigation Satellite Systems is an essential report for engineers, workshop attendees, policy makers, educators, and relevant government agencies.

This book explore the use of new technologies in the area of satellite navigation receivers. In order to construct a reconfigurable receiver with a wide range of applications, the authors discuss receiver architecture based on software-defined radio techniques. The presentation unfolds in a user-friendly style and goes from the basics to cutting-edge research. The book is aimed at applied mathematicians, electrical engineers, geodesists, and graduate students. It may be used as a textbook in various GPS technology and signal processing courses, or as a self-study reference for anyone working with satellite navigation receivers.