航空学报 > 2026, Vol. 47 Issue (12): 332839-332839   doi: 10.7527/S1000-6893.2026.32839

航天器微弱DS/FH测控信号长时间相干累积捕获技术

袁田1,2, 倪丽花2, 刘田2(), 谢伟2, 王谋3, 张琰1   

  1. 1.西安电子科技大学 空天地一体化综合业务网全国重点实验室,西安 710071
    2.西南电子技术研究所,成都 610036
    3.电子科技大学 信息与通信工程学院,成都 611731
  • 收稿日期:2025-09-28 修回日期:2025-10-27 接受日期:2025-12-02 出版日期:2025-12-29 发布日期:2025-12-29
  • 通讯作者: 刘田 E-mail:liutian139@139.com
  • 基金资助:
    四川省重大科技专项(2024ZDZX0041);成都市揭榜挂帅科技项目(2024-JB00-00014-GX)

Long-time coherent integration acquisition technique for weak DS/FH TTC signals of spacecraft

Tian YUAN1,2, Lihua NI2, Tian LIU2(), Wei XIE2, Mou WANG3, Yan ZHANG1   

  1. 1.State Key Laboratory of ISN,Xidian University,Xi’an 710071,China
    2.Southwest China Institute of Electronic Technology,Chengdu 610036,China
    3.School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China
  • Received:2025-09-28 Revised:2025-10-27 Accepted:2025-12-02 Online:2025-12-29 Published:2025-12-29
  • Contact: Tian LIU E-mail:liutian139@139.com
  • Supported by:
    Sichuan Provincial Major Science and Technology Special Project(2024ZDZX0041);Chengdu Science and Technology Program under “Open Competition Mechanism”(2024-JB00-00014-GX)

摘要:

针对高动态场景下大多普勒以及长时间积累引起的码片距离走动超过半码片周期,导致相干积累增益以及检测性能恶化的问题,提出了一种航天器微弱DS/FH测控信号长时间相干累积捕获技术,基于传统半码片滑动互相关矩阵构建了滑窗待校正矩阵,并基于0/1逻辑运算设计了抽取矩阵,对滑窗待校正矩阵抽取得到滑动互相关校正矩阵,然后结合分数倍时延补偿完成码片距离走动校正,与现有快速相干累积捕获技术的计算复杂度相当,同时显著提高了跳频相干积累增益以及检测性能。通过仿真分析验证,所提方法可有效解决高动态大多普勒和长时间积累场景下的相干积累增益和检测性能,为实际工程应用提供了重要的理论与实践价值。

关键词: DS/FH测控信号, 滑动互相关矩阵抽取, 距离走动校正, 相干积累捕获, 多普勒效应

Abstract:

To address the problem that chip range walk exceeds half a chip period due to large Doppler shifts and long-time integration in high-dynamic scenarios, which degrades coherent integration gain and detection performance, this paper proposes a long-time coherent integration acquisition technology for weak DS/FH (Direct Sequence/Frequency Hopping) TTC (Telemetry, Tracking, and Command) signals of spacecraft. Based on the traditional half-chip sliding cross-correlation matrix, a sliding-window matrix to be corrected is constructed first. Then, an extraction matrix is designed using 0/1 logic operations, and the sliding cross-correlation correction matrix is obtained by extracting from the sliding-window matrix to be corrected. Subsequently, chip range walk correction is completed by combining fractional delay compensation. Notably, the proposed technology maintains a computational complexity comparable to that of existing fast coherent integration acquisition technologies, while significantly improving frequency hopping coherent integration gain and detection performance. Verified by comprehensive simulation analyses under various conditions, the proposed method can effectively resolve the bottlenecks of coherent integration gain and detection performance in high-dynamic, large Doppler, and long-time integration scenarios. It not only provides a reliable technical solution for capturing weak DS/FH TTC signals but also offers important theoretical guidance and practical value for the engineering implementation of related spacecraft telemetry and tracking systems.

Key words: DS/FH TTC signals, sliding cross-correlation matrix extraction, range walk correction, coherent integration acquisition, Doppler effect

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