Dissertation > Excellent graduate degree dissertation topics show

Study of GPS Data De-noising Method Based on Wavelet and Kalman Filtering

Author: DingWen
Tutor: MaHongBin
School: Northeastern University
Course: Geodesy and Survey Engineering
Keywords: wavelet analysis Kalman filtering GPS data de-noising
CLC: P228.4
Type: Master's thesis
Year: 2009
Downloads: 64
Quote: 0
Read: Download Dissertation

Abstract


There are various error sources playing roles in the impact of GPS positioning accuracy. According to the basic theory of wavelet analysis and GPS signal noise characteristics, this study use the mathematical tool wavelet analysis in GPS data de-noising. Meanwhile, making wavelet analysis combine with Kalman filtering, this adaptive Kalman filtering method based on wavelet analysis is also used in GPS data de-noising. The experimental results show that the method used in GPS data de-noising can achieve good efficiency.The main research contents of this paper are as follows:For the structural characteristics of GPS signals, the study extract the L1, L2 carrier phase data from original signals. In order to weaken the accidental error such as multipath noise and observation noise, choosing one baseline for study object, which is dealed with wavelet de-noising by three schemes such as different decomposition levels, threshold selection methods and wavelet functions. The experimental results show that appropriate choice of de-noising method can greatly improve the accuracy of baseline solution, otherwise the accuracy may be reduced. On the basis of suitable wavelet de-noising method, we process number of baseline observation in different time or length, then provide the effective range of wavelet analysis used in GPS data de-noising.On the basis of wavelet de-noising method, secondary processing several baselines in wavelet de-noising effective range by adaptive Kalman filtering method, then comparing the effect of this new method with which of the single wavelet de-noising method or the single adaptive Kalman filtering method. The experimental results show that the effect of the adaptive Kalman filtering method based on wavelet analysis is better than which of the two single methods. The proportions of three methods improving GPS baseline solution accuracy are 43%, 35%,4%. The adaptive Kalman filtering method based on wavelet analysis used in purifying GPS original observations is the most effective.

Related Dissertations

  1. Research and Realization on Synchronization Technology of High Sensitivity GNSS Software Receiver,P228.4
  2. Study on Attitude Determination Method of Distributed Moving Warship OTHR System,P228.4
  3. The Research of Navigation Multi-Sensor Data Fusion Technology Based on Micro Unmanned Platform,V249.32
  4. Algorithm Research on SINS/GPS Integrated Navigation Syste,V249.328
  5. Attitude Determination and Finite Time Control Algorithms for a Satellite,V448.222
  6. Polarized-Light/Geomagnetism/GPS/SINS Integrated Navigation Algorithm,V249.328
  7. Study on the Locomotive Dynamic Supervision System,U284.48
  8. Research on Techniques of Information Acquisition and Location in Pavement Roughness Inspection,U416.2
  9. Research on Testing and Analyzing Technology for Time Parameter of Aerospace Relay,TM58
  10. Anti-Jam Technique Research for GPS,P228.4
  11. Study of Event Related Potentials Based on Chinese Auditory Cognition,R318.0
  12. Location Assisted Wi-Fi Discovery on Mobile Devices for Energy Saving,TN929.53
  13. Design of GPS Information Receiving System Based on Nios Ⅱ,TN967.1
  14. Energy-Efficient Localization Strategy for Smartphones,TN929.53
  15. GIS and GPS- based Land Resources dynamic inspection system design and implementation,P208;P228.4
  16. Design and Implementation of Hydrological Information Automatic Monitoring System,P335
  17. Bioinformatics Analysis of Ubiquitination and Pupylation,Q51
  18. Study on the Technique of Information Fusionapplied to Enbedded Driver Fatigue Detection,TP368.12
  19. Research Implementation of Crack Detection Method Based on Its Acoustic Property,TP274
  20. Research on Optimal Global Path Planning for Complete Coverage with GPS Guidance on Tractor,TN967.1
  21. Drivers' eyes open or closed state of the computer image recognition technology development,TP391.41

CLC: > Astronomy,Earth Sciences > Surveying and Mapping > Geodesy > Satellite geodesy and space geodesy > Global Positioning System (GPS)
© 2012 www.DissertationTopic.Net  Mobile