Global Navigation Satellite Systems

Global Navigation Satellite Systems

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The last few years there has been increased interest in the commercialization of the Global Navigation Satellite System (GNSS) which is often referred to as the Global Positioning System (GPS) in various applications. A GPS system uses spread spectrum signals-binary phaseshift keying (BPSK)-emitted from satellites in space for position and time determinations. Until recently, the use of GPS was essentially reserved for military use. Now there is great interest in using GPS for navigation of commercial aircraft. The U.S. Federal Aviation Administration (FAA) is looking into the possibility of using a wide area augmentation system (WAAS) to cover the whole United States with one system. There are also applications in the automotive industry, surveying, and personal and recreational uses. Due to the increase in popularity of GPS, and since it is a spread spectrum communication system using BPSK, a brief introduction is included in this text.

Chapter Contents:

  • 9.1 Satellite Transmissions
  • 9.2 Data Signal Structure
  • 9.3 GPS Receiver
  • 9.4 Atmospheric Errors
  • 9.5 Multipath Errors
  • 9.6 Narrow Correlator
  • 9.7 Selective Availability
  • 9.8 Carrier Smoothed Code
  • 9.9 Differential GPS
  • 9.10 DGPS Time Synchronization
  • 9.11 Relative GPS
  • 9.12 Doppler
  • 9.13 Kinematic Carrier Phase Tracking
  • 9.14 Double Difference
  • 9.15 Wide Lane/Narrow Lane
  • 9.16 Other Satellite Positioning Systems
  • 9.17 Summary

Inspec keywords: phase shift keying; aircraft navigation; Global Positioning System; spread spectrum communication

Other keywords: FAA; GNSS; spread spectrum communication system; US Federal Aviation Administration; position determinations; WAAS; spread spectrum signals-binary phaseshift keying; time determinations; wide area augmentation system; aircraft navigation; BPSK; Global Positioning System; global navigation satellite systems; automotive industry; GPS system

Subjects: Radionavigation and direction finding; Modulation and coding methods; Satellite communication systems

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