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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (2): 633-639.doi: 10.7527/S1000-6893.2014.0197

• Electronics and Control • Previous Articles     Next Articles

Effect of plasma on C/N0 of GPS signal

GAO Ping, LI Xiaoping, XIE Kai, LIU Yanming, SHI Lei   

  1. School of Aerospace Science and Technology, Xidian University, Xi'an 710126, China
  • Received:2014-03-25 Revised:2014-08-25 Online:2015-02-15 Published:2014-09-05
  • Supported by:

    National Basic Research Program of China (2014CB340204); Fundamental Research Funds for the Central Universities (K72125087)

Abstract:

The plasma induced in the reentry can potentially degrade electromagnetic system through amplitucle attenuation and phase shift by means of the varying electron density which vastly disturbs the reentry vehicle's communication, navigation and control, even produces the blackout. The relationship between the plasma and the GPS C/N0 is theoretically analyzed. Utilizing a large volume uniform plasma generator with long duration in the ordinary laboratory, a design of GPS binary phase shift keying (BPSK) signal propagation in plasma is made and an experiment of the plasma on GPS receiver is conducted to obtain the attenuation and C/N0 with different electron densities. The results indicate that attenuation is the same as the reduction of the C/N0. And the experimental values support the theoretical results which show the validity of the experimental method.

Key words: plasma, electron density, attenuation, GPS receiver, C/N0

CLC Number: