A novel high precision Doppler frequency estimation method based on the third-order phase-locked loop

被引：1
|
作者：
Deng, Tao [1 ,2 ]
Ma, Mao-Li [1 ]
Liu, Qing-Hui [1 ]
Wu, Ya-Jun [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2021年 / 21卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Doppler frequency measurement; deep space exploration; carrier tracking; phase locked loop; high precision; GPS RECEIVER; TRACKING;
D O I：
10.1088/1674-4527/21/9/221
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In deep space exploration, many engineering and scientific requirements require the accuracy of the measured Doppler frequency to be as high as possible. In our paper, we analyze the possible frequency measurement points of the third-order phase-locked loop (PLL) and find a new Doppler measurement strategy. Based on this finding, a Doppler frequency measurement algorithm with significantly higher measurement accuracy is obtained. In the actual data processing, compared with the existing engineering software, the accuracy of frequency of 1 second integration is about 5.5 times higher when using the new algorithm. The improved algorithm is simple and easy to implement. This improvement can be easily combined with other improvement methods of PLL, so that the performance of PLL can be further improved.
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页数：8
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