ChangE-3 DOR Signal Processing and Analysis
This paper researches the local correlation algorithm which is aimed at the characteristics of spacecraft DOR signal.The raw data is preprocessed to acquire the Doppler dynamic information of the received signal firstly.Then a model signal is generated which has the same frequency of the transmitted signal locally, and the model signal is utilized to do correlation processing with the raw data.Because of the error of initial delay model and estimated transmitted frequency, we propose to utilize the correctness of the frequency and phase based on polynomial fitting to improve the local correlation algorithm and adopt iteration to correct the model signal to solve the problems above.Finally, the differential phases of DOR signals are processed with Bandwidth Synthesis to calculate the DOR delay.This method has been utilized in ChangE-3 interferometry test data processing, the obtained residual delay is relatively stable and verifies the correctness of the improved method.
DOR signal Local correlation Doppler dynamic Polynomial fitting
Ke Xu Gongyou Wu Kun Jiang Yiwen Jiao Xin Lian
State Key Laboratory of Astronautic Dynamics, Xian 710043, China China Xichang Satellite Launch Centre, Xichang 615000, China Academy of Equipment, Beijing 101416, China
国际会议
The 27th Conference of Spacecraft TT&C Technology in China(第27届中国飞行器测控学术会议)
广州
英文
19-28
2014-11-09（万方平台首次上网日期，不代表论文的发表时间）