Low-Power Galileo - GPS single-shot receiver architecture for mobile terminals = Low-Power Galileo - GPS single-shot Empfängnisarchitektur für mobile Endgeräte

Annotation The content of this book reflects the results of the work carried out during my dissertation. For the first time the functionality of a GNSS receiver has been combined with the information gathered from a time-code receiver. For high efficient signal processing the architecture given here relies on the features of the DCF77 time-code signal. The combination of time synchronization and navigation signals eliminates the main drawback of common assisted GNSS receiver architectures, its massive usage of processing power. Nevertheless the advantages are preserved, namelya short Time-to-First-Fix at low power consumption. Based on the common Single-Shot receiver architecture, the extension by the time information together with navigation message and approximate position gives the opportunity to forecast the GNSS satellite signals. Consequently a reduction of the width of the search window for the code phases of the satellite signals can be realized. Together with fundamentals of satellite based navigation and the transmission of time information via long-wave radio signals this work gives an insight into the newly developed architecture. Additionally results of complex system simulations are presented 1 Introduction 26 1.1 Motivation 26 1.2 Goals and Organization of this Work 27 2 Global Navigation Satellite Systems 30 2.1 Principle of Satellite Navigation 30 2.1.1 Positioning using GNSS Space Vehicles 30 2.1.2 Reference Coordinate Systems 33 2.1.3 Satellite Orbit and Propagation Error Correction Parameters 34 2.2 NAVSTAR GPS 38 2.2.1 NAVSTAR GPS System Segments 39 2.2.2 Signal-in-Space Generation and Characteristics 40 2.3 Galileo 45 2.3.1 Galileo System Segments 46 2.3.2 Signal in Space Characteristics 46 3 State-of-the-Art GNSS Receiver Architectures 52 3.1 Acquisition and Tracking Receiver Architecture 52 3.2 Single-Shot Receiver Architecture 55 3.3 Search Space versus Time-to-First-Fix 59 4 Long-Range Time Synchronization 60 4.1 DCF77 Signal-in-Space Characteristics 61 4.2 Time Synchronization via LW Radio Signals 63 5 DAGNSS Receiver Architecture 68 5.1 System Overview 69 5.2 Analog-Radio-Frequency (RF) Frontend Architectures 70 5.2.1 GNSS RF Frontend 70 5.2.2 DCF77 RF Frontend 71 5.3 Digital Baseband Signal Processing Architecture 73 5.3.1 Input Signal Memory 74 5.3.2 Local PRN Memory 76 5.3.3 Correlation Engine 79 5.3.4 Baseband Control 83 5.4 Host Hardware and Operating System 83 5.5 Positioning Software 84 6 Systemsimulation 96 6.1 Simulation Setup 96 6.1.1 DCF77 SIS Model 97 6.1.2 GNSS SIS Model 100 6.1.3 DCF77 RF Frontend Model 103 6.1.4 GNSS RF Frontend Model 107 6.1.5 Digital Baseband Signal Processing Model 108 6.1.6 Positioning Solution 108 6.2 Simulation Results 109 6.2.1 DCF77 Simulation Results 109 6.2.2 GNSS Simulation Results 112 7 Summary and Outlook 126 Satellite navigation,Assisted navigation,Single-Shot receiver,DCF77,mobile devices The content of this book reflects the results of the work carried out during my dissertation. For the first time the functionality of a GNSS receiver has been combined with the information gathered from a time-code receiver. For high efficient signal processing the architecture given here relies on the features of the DCF77 time-code signal.