A Quick Location Method for High Dynamic GNSS Receiver Based on Time Assistance
AbstractTraditional A-GPS positioning method when quickly calculate a position, need a condition that the approximate position must not exceed 150km, otherwise the calculation will be very complex. This paper proposes a time-assisted fast positioning method for high dynamic GNSS receiver, effectively solving the problem of large search calculation in traditional method, even if exact position is unknown after the signal is recaptured. According to the known auxiliary time information and implied elevation information, this paper put forwards a custom coordinate system for building twodimensional search space, which could reduce the number of search-dimensions. It proposes a search method based on receiver clock calculated by analyzing the influence of time auxiliary accuracy. By using GPS ephemeris data provided by the IGS, it builds a simulation environment and analyzes the influence of different preferred satellites based on the custom coordinate system on the calculation, and thus puts forward a principle for choosing the preferred satellites. Simulation examples show that through the rational combination of satellites to create a custom coordinate system, and when time auxiliary accuracy is less than 60us, the calculation can 100% guarantee to restore a complete satellite signal emission time and obtain an accurate position.
 Agarwal, N., Basch, J., Beckmann, P.; Algorithms for GPS operation indoors and downtown, GPS Solutions, 6:149-160, 2002.
 Diggelen, F. V.; Indoor GPS theory & implementation, IEEE Position, Location & Navigation Symposium, 40-247, 2002.
 HUANG Yiping; GPS receiver with extended hot start capability: US, 7466265, 2008.
 Akopian, D., Syrjärinne, J.; A fast positioning method without navigation data decoding for assisted GPS receivers, Vehicular Technology, 58:4640-4645, 2009.
 LI, Jizhong, WU, Muqing; A Positioning Algorithm of AGPS, International conference on signal processing systems, 385-388, 2009.
 Sirola N.Syrjärinne, J.; GPS position can be computed without the navigation data, ION GPS, 2741-2744, 2002.
 CAO, Hui, YUAN, Hong; Method for Time-of-transmission Recovery Based on Assisted- GPS Positioning, Chinese J.Space Sci, 32(3):585-591, 2012.
 Yang Chuan, Wang Yongsheng, SHI Lijian; Study of atom clock aiding GPS positioning, GNSS World of China, 4:5-8, 2005.
 John Kitching,Svenja Knappe, Li-Anne Liew,et al. Chip-Scale Atomic Frequency References. ION GNSS 18th International Technical Meeting of the Satellite Division, September 2005, Long Beach, CA,1662-1669.
 SA.45s Chip Scale Atomic Clock Data Sheet. Symmetricom 2013. http://www.symmetricom.com/products/.
 WU Peng, XU Bo, LIUWenxiang, WANG Feixue. GNSS emergency positioning method and research on the accuracy estimation[C].//The forth sector of the Chinese Satellite Navigation Conference, (CSNC). Wuhan, 2013.
 WU Peng, WANG Feixue. The method and analysis of DOP calculation in three-satellite positioning in BD system, The second sector of the Chinese Satellite Navigation Conference, (CSNC). Shanghai, 2011.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
ONLINE OPEN ACCES: Acces to full text of each article and each issue are allowed for free in respect of Attribution-NonCommercial 4.0 International (CC BY-NC 4.0.
You are free to:
-Share: copy and redistribute the material in any medium or format;
-Adapt: remix, transform, and build upon the material.
The licensor cannot revoke these freedoms as long as you follow the license terms.
DISCLAIMER: The author(s) of each article appearing in International Journal of Computers Communications & Control is/are solely responsible for the content thereof; the publication of an article shall not constitute or be deemed to constitute any representation by the Editors or Agora University Press that the data presented therein are original, correct or sufficient to support the conclusions reached or that the experiment design or methodology is adequate.