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Volume 31 Issue 12
Dec.  2005
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Journal of Beijing University of Aeronautics and Astronautics  > 2005  >  31(12): 1269-1273.
WU Zong-cheng, ZHU Zi-qiang, LI Jin, et al. Computation of Transonic Turbulent Flow Around a Blunt Nosed Short Body at Large Angle of Attack[J]. Journal of Beijing University of Aeronautics and Astronautics, 2002, 28(6): 675-678. (in Chinese)
Citation: Yang Chunbao, You Zheng, Zhang Yonget al. Strategy of signal search and acquisition in spaceborne GPS receiver[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(12): 1269-1273. (in Chinese)
shu

Strategy of signal search and acquisition in spaceborne GPS receiver

  • 1.

    Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China

  • 2. Academy of Opto-electronics, Chinese Academy of Sciences, Beijing 100080, China

  • Received Date: 23 Sep 2004
  • Publish Date: 31 Dec 2005
    Abstract
  • Unaided cold start time is an important performance of spaceborne global position system(GPS) receiver. Reduction of cold start time was developed for C/A code navigation receiver on low earth orbit(LEO). The search method of frequency and code phase, signal detector and parameters select, doppler bin, and code search speed were analyzed. Doppler bin of 500 Hz and code search speed of 475 chips/s were obtained. The orbital inclination, orbital altitude, elevation of GPS antenna and orbital eccentricity were researched as the influential factors to doppler range. GPS satellite allocation according to statistical information of angle between GPS satellites was discussed. Analysis and simulation shows that the cold start time is reduced by 25%~30% through this GPS satellite allocation method, the influential factors of doppler range are orbital inclination, orbital altitude, elevation of GPS antenna and orbital eccentricity in regular order with an effect, the cold start time is reduced by 25%~40% farther considering these influential factors of doppler range.

     

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    • References(1)
  • [1] Bauer F H, Hartman K, Lightsey E G. Spaceborne GPS current status and future visions . Proceedings of the 11th International Technical Meeting of the Satellite Division of the Institute of Navigation . Nashville, Tennessee:ION GPS, 1998.1493~1508[2] Balbach O, Eissfeller B, Hein G W, et al. Tracking GPS above GPS satellite altitude:first results of the GPS experiment on the HEO mission equator-S . Proceedings of the 11th International Technical Meeting of the Satellite Division of the Institute of Navigation . Nashville,Tennessee:ION GPS, 1998.1555~1564[3] Moreau M C. GPS receiver architecture for autonomous navigation in high earth orbits . Boulder, Colorao:Department of Aerospace Engineering Sciences, University of Colorado, 2001[4] Kaplan E. Understanding GPS:principles and application [M]. Boston:Artech House,1996[5] Kent K, Premal M, Chad C, et al. A complete IF software GPS receiver:a tutorial about the detalils . [6] Samuli P, Jari S. Improved method for satellite acquisition . ION GPS 2000 . UT:Salit Lake City,2000.1957~1961
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