Loading...

Design of Multi Frequency, Multi Constellation GNSS Receiver

Abolfathi Momtaz, Abbas | 2017

794 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49905 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Behnia, Fereidoon
  7. Abstract:
  8. With the advent of new global navigation satellite systems and the technical progress of GPS, some valuable advantages can be achieved by using a combination of data from different constellations. There are some inter system biases between two separate constellation. One has to consider these biases in order to earn better accuracy in a multi constellation receiver. One of the main sources of the error in the position estimation is the random delay of the signal in the ionosphere layer. Recently GPS has released its dual frequency feature on civilian users. Using this feature, receiver will be able to estimate ionospheric delay due to its frequency dependence. The non-line-of-sight path of signal can cause a large error in the position estimation in urban area. This type of error is sparse. In this thesis algorithms needed for positioning based on satellite navigation systems are discussed. Two methods for combination of different constellation is proposed. A novel method for mitigating of non-line-of-sight error is introduced using its sparsity feature. We separate different kind of error based on their statistical feature and using sub space method. One can use this algorithm to select the best set of satellites for positioning. The goal of these algorithms is to improve accuracy and reliability of a multi constellation multi frequency positioning system. In the end, these algorithms are examined using real data
  9. Keywords:
  10. Satellite Navigation ; Global Position System (GPS) ; Global Navigation Satellite Systems (GNSS) ; Multiconstellation Receiver ; Multi-Frequency Receiver ; Ionospheric Delay ; Nonline of Sight (NLOS)

 Digital Object List

 Bookmark

No TOC