Fast Three‐Dimensional Search Algorithm to Improve the Carrier Tracking Performance During the Entry, Descent, and Landing (EDL) Phase of Mars Probes
Fast Three‐Dimensional Search Algorithm to Improve the Carrier Tracking Performance During the Entry, Descent, and Landing (EDL) Phase of Mars Probes
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DOI：
10.1029/2021rs007275
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发表时间：
2022-12
期刊：
影响因子：
1.6
通讯作者：
Tao Deng;Maoli Ma;Qinghui Liu
中科院分区：
文献类型：
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作者：
Tao Deng;Maoli Ma;Qinghui Liu
对高动态和极弱信号的载波跟踪具有挑战性，包括在火星探测器的进入、下降和着陆阶段以及月球探测器的软着陆阶段。本文设计了一种基于频率极大似然估计的新型频率检测器，并构造了锁频环算法。锁频环适用于跟踪一阶和二阶导数较大的多普勒频移。与喷气推进实验室的频率极大似然估计相比，计算时间大大缩短。仿真结果验证了该算法的有效性。该方法为深空探测中的多普勒频率测量提供了很好的方法，特别是在跟踪高动态和极弱信号的情况下。
Carrier tracking for highly dynamic and extremely weak signals is challenging, including during the entry, descent, and landing phase of Mars rovers and the soft landing of lunar probes. In this study, a novel frequency detector is designed based on the frequency maximum likelihood estimator, and a frequency‐locked loop algorithm is constructed. The frequency‐locked loop is suitable for tracking Doppler shifts with large first and second derivatives. Compared with the Jet Propulsion Laboratory frequency maximum likelihood estimator, the computation time is significantly reduced. The simulation results illustrate the effectiveness of the proposed algorithm. This method provides a good method for Doppler frequency measurement in deep space exploration, especially when tracking highly dynamic and extremely weak signals.