High sensitivity and dynamic acquisition method based on space application
Global positioning system (GPS) has been demonstrated to be a valid and efficient system for terrestrial applications and space applications in low earth orbit (LEO),such as location determination and time synchronization.However,in much broader high earth orbit (HEO),the number of space applications is much smaller because of the high sensitivity and dynamic.Compared with indoor terrestrial application (high sensitivity (24 dB-Hz),low dynamic (maximum 0.8 Hz/s)) ”1” and LEO space application (low sensitivity (50 dB-Hz),high dynamic (70 Hz/s)) ”2”,the HEO space applications are so different.The sensitivity and dynamic can be up to 15 dB-Hz and 5 Hz/s ”2”.To solve this problem,2 different versions of acquisition method are presented.One of them can achieve 17 dB-Hz and 5 Hz/s with only cost of FPFA resources,the other can achieve 15 dB-Hz and 5 Hz/s with the cost of FPGA resources and longer acquisition time.To prove the acquisition method mentioned above,both theoretical analysis and simulation (software and hardware) based on real data come from Spirent 8000 ”3” are discussed.The final outcome shows that the presented acquisition method has a good performance on HEO orbit and the acquisition results are identical with theoretical analysis.
acquisition high sensitivity high dynamic space application
Jia Tian Yanguang Wang Wei Wang Pingyan Shi
CAST - Xi”an Institute of Space Radio Technology,Changan section,Xi”an,China
国内会议
西安
英文
1-9
2015-05-13（万方平台首次上网日期，不代表论文的发表时间）