等离子体对GPS信号载噪比的影响
收稿日期: 2014-03-25
修回日期: 2014-08-25
网络出版日期: 2014-09-05
基金资助
国家"973"计划(2014CB340205);中央高校基本科研业务费专项资金(K72125087)
Effect of plasma on C/N0 of GPS signal
Received date: 2014-03-25
Revised date: 2014-08-25
Online published: 2014-09-05
Supported by
National Basic Research Program of China (2014CB340204); Fundamental Research Funds for the Central Universities (K72125087)
高平 , 李小平 , 谢楷 , 刘彦明 , 石磊 . 等离子体对GPS信号载噪比的影响[J]. 航空学报, 2015 , 36(2) : 633 -639 . DOI: 10.7527/S1000-6893.2014.0197
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
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