A novel Doppler frequency measurement method based on the closed-loop signal correlation for deep space exploration

A novel Doppler frequency measurement method based on the closed-loop signal correlation for deep space exploration
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一种基于闭环信号相关的深空探测多普勒频率测量方法

DOI:
10.1088/1674-4527/21/9/220
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发表时间:
2021-11
期刊:
RAA
影响因子:
--
通讯作者:
Xin Zheng
Xin Zheng
中科院分区:
其他
文献类型:
--
作者:
Tao Deng;Maoli Ma;Qingbao He;Qinghui LIU;Yajun Wu;Xin Zheng

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在深空探测中,需要提高测频精度,以满足精密定轨和各种科学研究的要求。鉴相器是制约锁相环跟踪性能的关键模块之一。基于相邻信号在时域上的相位关系,提出了一种新的相位检测器来代替反正切相位检测器。该锁相环是一种闭环信号相关算法,在适当的参数设置下,具有良好的信号跟踪性能,1秒积分频率跟踪精度接近Cramer-Rao下限(CRLB)。实际数据处理结果进一步验证了该锁相环的优良性能。
In deep space exploration, it is necessary to improve the accuracy of frequency measurement to meet the requirements of precise orbit determination and various scientific studies. A phase detector is one of the key modules that restricts the tracking performance of phase-locked loop (PLL). Based on the phase relationship between adjacent signals in the time domain, a novel phase detector is presented to replace the arctangent phase detector. The new PLL, which is a closed loop signal correlation algorithm, shows good performance in tracking signals with high precision and the tracking accuracy of frequency of 1 second integration is close to Cramer-Rao lower bound (CRLB) when setting proper parameters. Actual data processing results further illustrate the excellent performance of the novel PLL.
DOI: 10.1016/j.ultras.2012.02.007
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