Dissertation > Excellent graduate degree dissertation topics show

The Research of Multipath Effect Model and Mitigation Method for GNSS Based Sea Dynamic Environment

Author: LiuYongYi
Tutor: DangYaMin；ZhengZuoYa
School: Shandong University of Science and Technology
Course: Geodesy and Survey Engineering
Keywords: GNSS positioning Sea Multipath effect Dynamic environment Modeling Wavelet Transform
CLC: P228.4
Type: Master's thesis
Year: 2011
Downloads: 52
Quote: 0
Read: Download Dissertation

Abstract


In GNSS various errors , the satellite clock errors , receiver clock error , atmospheric delay error can be double difference observed or accurate models to be eliminated or weakened, and multipath error due to weak correlation between stations , and due to the a great influence on the surrounding environment , can not be eliminated through the double difference observation , there is no accurate correction model . Mainly through hardware design, a reasonable choice of site plan , based on signal processing techniques and other methods of weakening . GNSS applications in the marine surveying and mapping increasingly widespread , as marine characteristics environment , multipath effects are an important source of error seriously affect its accuracy , so to establish a multi-path effects model sea environment has important significance. This paper analyzes the sea environment and the impact of sea multipath reflection coefficient reflecting surface to the antenna distance and other factors, on the sea surface multipath effects modeling environment was discussed . Simulated sea calm lake and dynamic multi-path effect in the environment in the process , according to the geometric relationship between the parameters derived in both cases multipath effects model and use simulation data for dynamic sea environment multipath effects model verified using wavelet transform to extract multi-path effects , according to the multi- path effects periodicity, proposed the use of adjacent cycles to determine the relevance of the detail signal wavelet layers approach. The results show that using wavelet transform method can extract multipath error , there is a certain increase positioning accuracy . Future research focused on choosing the right wavelet wavelet transform to extract multipath effects .

Related Dissertations

  1. The Realization of Coal Liquefaction in the Continum Model System and the Experimental Research of Coal Liquefaction,TQ529.1
  2. Soft Sensor of Naphtha Dry Point on Support Vector Machines Regression,TE622.1
  3. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  4. Coupled Calculation of the Solidification Paths of Ternary Eutectic Alloys Based on Thermo-Calc,TG111.4
  5. Tooth Profile Modeling and Machining Error Analysis of the Face Gear,TH132.41
  6. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  7. Research on HID Lamp Rectifying Effect,TM923.32
  8. The Research on Ship Imaging Algorithm under the Sea Clutter Background,TN958
  9. Service Model Driven Architecture (SMDA) Oriented Modeling Techniques and Tool Implemention,TP311.52
  10. Feature Extraction, Selection and Combination in Lipreading,TP391.41
  11. Modeling Internet Link Delay Based on Measurement,TP393.4
  12. Modeling Analysis and Slip Estimation for Lunar Rovers,TP242
  13. Based on SEM Quality Evaluation of Rural Compulsory Education in China,G522.3
  14. Research on Adaptive Control of Recovery of UUV with Near Wall Constraint,TP273
  15. Table lamp shape of Art and Design,TS956
  16. Research on Identification System of Cashmere and Wool Fiber,TS101.921
  17. Mathematical Modeling in the High School Mathematics Teaching Practice and Exploration,G633.6
  18. Cloning, Identification and Eukaryotic Expression of Variable Region of Monoclonal Antibodies Against Chelated Mercury, Copper and Zinc and Three Dimentional Modeling of Recombinant Antibody,X171.5
  19. Study on Model-Based Visualization of Wheat Root Systems,S512.1
  20. Research on Control Algorithm of Ball&Plate System,TP13
  21. Characteristics of sensory stimulation evoked,R318.0

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