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

作　　者：Tao Deng Mao-Li Ma Qing-Hui Liu Ya-Jun Wu 

机构地区：[1]Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Research in Astronomy and Astrophysics》2021年第9期83-90,共8页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11773060,11973074,U1831137 and 11703070);National Key Basic Research and Development Program(2018YFA0404702);Shanghai Key Laboratory of Space Navigation and Positioning(3912DZ227330001);the Key Laboratory for Radio Astronomy of CAS。

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.

关 键 词：Doppler frequency measurement:deep space exploration:carrier tracking:phase locked loop:high precision 

分 类 号：P111[天文地球—天文学]