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Start Acceleration of the Space GPS Receiver

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The cold start of the space GPS receiver, i.e. the start without any information about the receiver position, satellite constellation, and time, is complicated by a large Doppler shift of a navigation signal caused by the satellite movement on the Earth orbit. That increases about five times the search space of the navigation signals compared to the standard GPS receiver. The paper investigates a method of the acceleration of the GPS receiver cold start time designed for the pico- and femto-satellites. The proposed method is based on a combination of the paralel search in Doppler frequency and PRN codes and the serial search in code phase delay. It can shorten the cold start time of the GPS receiver operating on LEO orbit from about 300 to 60 seconds while keeping the simplicity of FPGA signal processor and low power consumption. The developed algorithm was successfully implemented and tested in the piNAV GPS receiver. The Energy required for the obtaining of the position fix was reduced five times from 36 on to 7.7 Joules. This improvement enables applications of such receiver for the position determination in smaller satellites like Pocket Cube or femto-satellites with a lower energy budget than the Cube Satellite.
Słowa kluczowe
Rocznik
Strony
745--752
Opis fizyczny
Bibliogr. 13 poz.,fot., rys., tab., wykr.
Twórcy
  • Faculty of Electrical Engineering, The Czech Technical University in Prague, Prague, The Czech Republic
Bibliografia
  • [1] O. Montenbruck, M. Garcia-Fernandez, and J. Williams. Performance comparison of semicodeless GPS receivers for LEO satellites. GPS Solutions, 10(4): 249–261, Mar. 2006.
  • [2] J. Yuan, H. Jia, and Q. Fang. Application of GPS to space vehicles: analysis of space environment and errors. IEEE Aerospace and Electronic Systems Magazine, 13(1): 25–30, 1998.
  • [3] S. S. Arnold, R. Nuzzaci, and A. Gordon-Ross. Energy budgeting for CubeSats with an integrated FPGA. In 2012 IEEE Aerospace Conference. IEEE, Mar. 2012.
  • [4] I. Ali, N. Al-Dhahir, and J.E. Hershey. Doppler characterization for LEO satellites. IEEE Transactions on Communications, 46(3): 309–313, Mar. 1998.
  • [5] L. Sihver, S. Kodaira, I. Ambrozova, Y. Uchihori, and V. Shurshakov. Radiation environment onboard spacecraft at LEO and in deep space. In 2016 IEEE Aerospace Conference. IEEE, Mar. 2016.
  • [6] T. Tsujii I. G. Petrovski. Digital Satellite Navigation and Geophysics. Cambridge University Press, 2012.
  • [7] E. D. Kaplan. Understanding GPS: Principles and Applications, Second Edition. Artech House, 2005.
  • [8] P. Kovar and S. Jelen. Cold start strategy of the CubeSat GPS receiver. Advances in Electrical and Computer Engineering, 14(2): 29–34, 2014.
  • [9] J. Walker. Performance data for a double-threshold detection radar. IEEE Transactions on Aerospace and Electronic Systems, AES-7(1): 142–146, jan 1971.
  • [10] S. Yuyao, W. Yongqing, C. Jingyao, and W. Siliang. High sensitivity acquisition algorithm for DSSS signal with data modulation. China Communications, 12(4): 76–85, Apr. 2015.
  • [11] D. J. R. van Nee and A. J. R. M. Coenen. New fast GPS code-acquisition technique using FFT. Electronics Letters, 27(2): 158, 1991.
  • [12] P. W. Ward. GPS receiver search techniques. In Proceedings of Position, Location and Navigation Symposium - PLANS '96. IEEE, 1996.
  • [13] W. Zhang and M. Ghogho. Improved fast modified double-block zero-padding (fmdbzp) algorithm for weak gps signal acquisition. In 2010 18th European Signal Processing Conference, pages 1617–1621, Aug. 2010.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-471f5298-10fe-43cd-89c2-ebd07f47060c
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