Dissertation > Excellent graduate degree dissertation topics show

The Analysis and Research of Multi-path Signal Estimation in GPS Receiver

Author: WeiGuoQing
Tutor: HuangYong
School: West China University
Course: Signal and Information Processing
Keywords: Multipath TK MEDLL algorithm MEDLL algorithm DSP
CLC: P228.4
Type: Master's thesis
Year: 2011
Downloads: 195
Quote: 0
Read: Download Dissertation

Abstract


Global Positioning System (GPS, namely Global Position System) with people's lives, as it has the characteristics such as global coverage, continuous / day work, can provide high dynamic platform to provide services, as well as high-precision positioning. The GPS receiver as a people to use global positioning system interface, and the people most closely related to, but also the focus of the study. GPS receiver working order for the signal search and acquisition, signal tracking, sub-frame identification, ephemeris and pseudorange calculation, calculation of satellite position and location of the user, thus accurate positioning. Affecting the pseudorange measurement accuracy of the main error from the following aspects such as ephemeris errors, satellite clock offset and receiver clock bias, ionospheric disturbances, tropospheric interference, multipath errors, noise and so on. In some applications, multipath error introduced occupy a dominant position, in which a short delay multipath signal has a larger amplitude due and difficult to be suppressed by improving receiver technology brought greater error. Current multipath suppression technology, multi-path from the ground can be suppressed by the antenna design. However, from the antenna at the top of the multipath signal is difficult to suppress by the antenna design, it needs improvement or the receiver signal processing techniques to achieve. This article mainly analyzes and studies GPS multipath signal suppression technology, by analyzing cepstrum algorithm, Teager-Kaiser (TK) multipath estimation algorithm and delay locked loop (MEDLL, namely Multi-path Estimating Delay Lock Loop) technology, combined with TK with MEDLL two algorithms, the improved algorithm is proposed MEDLL while multipath signals are estimated parameters, the final separation from the received signal multipath signals, reducing multipath effects by, and will signal processing algorithms for digital signal processor (DSP, i.e. Digital Signal Processor) in the implementation. The article first multipath signals of GPS mathematical structure and the signal classification, and then describes the composition of the receiver module and the multi-path signal interference impact of each module. On this basis, the receiver receives the signal are analyzed in detail using the associated signal processing algorithm. First, the article design signal source for generating a GPS multipath signal, by removing the carrier, while the local code and the associated alignment, obtained correlation function. TK and MEDLL two algorithms use a combination of algorithm, multipath signal processing. Analysis of the algorithm and compare MEDLL MEDLL improved algorithm processing results of the two algorithms; also illustrates these two algorithms. Done in MATLAB software algorithm, based on the algorithm in hardware DSP which further analysis, fixed-point processing.

Related Dissertations

  1. Design of Electronicalcontrol System for Electronic Jacquard Knitting Machine,TS183
  2. Research on the Integrated Grating Subdividing Digital Display Device Based on DSP,TH822
  3. Study on Two Dimensional of Auto-Collimator Based on DSP,TH741.14
  4. Study on the Control System for Automatic Aiming of HWIL Pitching Mechanism,TJ303
  5. Research on Synchronous Motor Excitation Control System,TM341
  6. The AES Algorithm and Its Implementation in DSP,TN918.1
  7. The Design of a DSP-Based Robot Speech Command Recgnition System,TN912.34
  8. Research on Signal Receiving System of Phase Laser Range Finder,TN249
  9. Study on Implementation Technology of Channel Estimation in OFDM System Based on DSP,TN919.3
  10. Optimizing and Realising Research on Vedio Compression in TV Guidance System,TN919.81
  11. Voice Signal De-noise Base on Wavelet and Arithmetic Implement with DSP,TN912.3
  12. Research on Image Compression and Implementation Using TMS320C6713 Based on SPIHT Algorithm,TP391.41
  13. A Study on the Technology of the Infrared Image Matching,TP391.41
  14. Development of 3-Dimensional Scanning Probe Data Acquisition System Based on DSP,TP274.2
  15. Development of Vxibus Common Interface Module Based on DSP,TP274
  16. Research of Acoustic Signal Acquisition System Based on DSP,TP274.2
  17. Research of DSP-based Real-time Demodulation Method of One-frequency Laser Interferometer,TN911.3
  18. Laser alignment system posture measuring device developed,TN24
  19. ATV vehicle weapon control system,TP273
  20. Design of VoIP Gateway Based on DSP,TN916.2
  21. A Novel Controller Design for Active Power Filter with Low Switching Loss,TN713.8

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