ACTA AERONAUTICAET ASTRONAUTICA SINICA >
A real-time high-precision frequency estimation algorithm for Starlink signals with CPU+GPU parallel acceleration
Received date: 2025-03-28
Revised date: 2025-04-14
Accepted date: 2025-06-16
Online published: 2025-06-27
Supported by
National Natural Science Foundation of China(61973314);National Social Science Fund of China(2024SKJJB037)
The design and implementation of a real-time high-precision frequency estimation algorithm for Starlink downlink signals is a critical technology for the engineering application of LEO satellite dynamic opportunistic navigation. Traditional algorithms such as maxi-mum likelihood estimation, frequency-domain sliding window estimation, and Kalman filtering suffer from poor robustness and insufficient real-time performance in capturing low Signal-to-Noise Ratio (SNR) Starlink signals. To address these issues, this paper proposes a Multi-Carrier Joint Frequency Estimation (MC-JFE) algorithm, which enhances frequency estimation accuracy and real-time performance by deeply exploiting the multi-subcarrier structural characteristics of signals and jointly optimizing carrier frequency and frequency interval parameters. To overcome the intensive computational bottleneck in the engineering application of the MC-JFE algorithm, an innovative CPU+GPU heterogeneous parallel acceleration architecture is constructed, achieving over an order of magnitude improvement in execution efficiency through coordinated scheduling of CPU logic control and GPU large-scale parallel computing capabilities. To validate the theoretical and technical effectiveness of the proposed algorithm, real-time frequency estimation experiments were conducted on 5 978 Starlink satellite downlink beacon signals generated by a hardware-in-the-loop simulation platform, along with a comparative Doppler estimation studies using measured signals from China’s border regions. Results show that the MC-JFE algorithm maintains the lowest estimation error boundary across the full SNR range (-10 dB to 10 dB), with over 50% improvement in estimation accuracy at 0 dB. Moreover, stable out-put is maintained during partial subcarrier interruptions through a phase information fusion mechanism. The CUDA-optimized CPU+GPU heterogeneous architecture achieves 0.1 Hz-level high-precision frequency estimation, with a peak speedup ratio of 47× (2.8× faster than traditional CPU solutions) and a positive correlation between accuracy and acceleration, providing highly reliable and real-time frequency estimation technical support for LEO satellite dynamic opportunistic navigation, demonstrating significant engineering application value.
Chuanjin DAI , Peijie QIN , Lin LI , Bo ZANG . A real-time high-precision frequency estimation algorithm for Starlink signals with CPU+GPU parallel acceleration[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(24) : 332038 -332038 . DOI: 10.7527/S1000-6893.2025.32038
| [1] | 崔志颖, 岳富占, 田润, 等. 基于铱星突发信号的导航定位技术研究[J]. 全球定位系统, 2021, 46(2): 77-85. |
| CUI Z Y, YUE F Z, TIAN R, et al. Research on positioning technology based on Iridium burst signal[J]. GNSS World of China, 2021, 46(2): 77-85 (in Chinese). | |
| [2] | 秦红磊, 谭滋中, 丛丽, 等. 基于ORBCOMM卫星机会信号的定位技术[J]. 北京航空航天大学学报, 2020, 46(11): 1999-2006. |
| QIN H L, TAN Z Z, CONG L, et al. Positioning technology based on ORBCOMM signals of opportunity[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(11): 1999-2006 (in Chinese). | |
| [3] | 王学宇, 武坦然. OneWeb低轨道卫星系统及其军事应用分析[J]. 航天电子对抗, 2022, 38(4): 59-64. |
| WANG X Y, WU T R. Analysis on OneWeb LEO satellite system and its military application[J]. Aerospace Electronic Warfare, 2022, 38(4): 59-64 (in Chinese). | |
| [4] | 翟光, 王妍欣, 孙一勇. 基于低轨星网的多目标协同跟踪滤波技术[J]. 系统工程与电子技术, 2022, 44(6): 1957-1967. |
| ZHAI G, WANG Y X, SUN Y Y. Cooperative tracking filtering technology of multi-target based on low orbit satellite constellation[J]. Systems Engineering and Electronics, 2022, 44(6): 1957-1967 (in Chinese). | |
| [5] | 陈全, 杨磊, 郭剑鸣, 等. 低轨巨型星座网络: 组网技术与研究现状[J]. 通信学报, 2022, 43(5): 177-189. |
| CHEN Q, YANG L, GUO J M, et al. LEO mega-constellation network:Networking technologies and state of the art[J]. Journal on Communications, 2022, 43(5): 177-189 (in Chinese). | |
| [6] | 孟光, 刘昶, 杨冬春, 等. 美国SpaceX超重-星舰首飞分析及对中国航天产业的启示[J]. 航空学报, 2023, 44(10): 028914. |
| MENG G, LIU C, YANG D C, et al. First flight of SpaceX heavy-lift starship: Enlightenment for aerospace industry in China[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(10): 028914 (in Chinese). | |
| [7] | 张小红, 马福建. 低轨导航增强GNSS发展综述[J]. 测绘学报, 2019, 48(9): 1073-1087. |
| ZHANG X H, MA F J. Review of the development of LEO navigation-augmented GNSS[J]. Acta Geodaetica et Cartographica Sinica, 2019, 48(9): 1073-1087 (in Chinese). | |
| [8] | 南子寒, 刘大禹, 董明, 等. GNSS拒止下多源自主导航鲁棒滤波方法[J]. 航空学报, 2024, 45(S1): 730782. |
| NAN Z H, LIU D Y, DONG M, et al. Robust filtering method for GNSS denied multi-source autonomous navigation[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(S1): 730782 (in Chinese). | |
| [9] | 丁虎山, 陈帅, 宋华, 等. 低轨卫星增强GNSS/MIMU紧组合定位性能分析[J]. 导航定位学报, 2024, 12(6): 70-75. |
| DING H S, CHEN S, SONG H, et al. Performance analysis of LEO satellites enhanced GNSS/MIMU tight integration positioning[J]. Journal of Navigation and Positioning, 2024, 12(6): 70-75 (in Chinese). | |
| [10] | 李喆, 林威洪, 邓伟, 等. Starlink下行信号的多普勒效应影响分析[J]. 通信学报, 2024, 45(3): 131-141. |
| LI Z, LIN W H, DENG W, et al. Analysis of the influence of Doppler effect on Starlink downlink signals[J]. Journal on Communications, 2024, 45(3): 131-141 (in Chinese). | |
| [11] | 张嵩, 张洋, 田文飚, 等. 基于Starlink卫星信号的海面目标被动探测[C]∥第三届中国空天安全会议论文集. 北京:中国指挥与控制学会, 2021: 184-189. |
| ZHANG S, ZHANG Y, TIAN W B, et al. Passive detection of sea surface targets based on Starlink satellite signals[C]∥Proceedings of the 3rd China Aerospace Safety Conference. Beijing: Chinese Institute of Command and Control, 2021: 184-189 (in Chinese). | |
| [12] | 刘涵, 方胜良, 范有臣, 等. 机会信号导航综述[J]. 兵器装备工程学报, 2022, 43(7): 78-86, 158. |
| LIU H, FANG S L, FAN Y C, et al. Review of navigation via signals of opportunity[J]. Journal of Ordnance Equipment Engineering, 2022, 43(7): 78-86, 158 (in Chinese). | |
| [13] | 秦红磊, 杜岩松. 一种Iridium机会信号/MEMS-INS组合定位技术[J]. 导航定位学报, 2023, 11(3): 45-52. |
| QIN H L, DU Y S. An integrated positioning algorithm of Iridium opportunity signals and MEMS-INS[J]. Journal of Navigation and Positioning, 2023, 11(3): 45-52 (in Chinese). | |
| [14] | 张艺超, 赵祥天, 赵亚飞, 等. 低轨卫星机会信号导航定位方法[J]. 天地一体化信息网络, 2024, 5(4): 3-16. |
| ZHANG Y C, ZHAO X T, ZHAO Y F, et al. Navigation and positioning methods using signal of opportunity of low earth orbit satellites[J]. Space-Integrated-Ground Information Networks, 2024, 5(4): 3-16 (in Chinese). | |
| [15] | 秦红磊, 李志强, 赵超. Iridium/ORBCOMM机会信号融合定位技术[J]. 北京航空航天大学学报, 2022, 48(10): 1845-1853. |
| QIN H L, LI Z Q, ZHAO C. Fusion positioning based on Iridium/ORBCOMM signals of opportunity[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(10): 1845-1853 (in Chinese). | |
| [16] | 秦红磊, 张宇. 星链机会信号定位方法[J]. 导航定位学报, 2023, 11(1): 67-73. |
| QIN H L, ZHANG Y. Positioning technology based on Starlink signal of opportunity[J]. Journal of Navigation and Positioning, 2023, 11(1): 67-73 (in Chinese). | |
| [17] | 袁祎平, 易建新, 万显荣, 等. 基于星链信标信号的多普勒定位方法与实验[J]. 系统工程与电子技术, 2024, 46(8): 2535-2545. |
| YUAN Y P, YI J X, WAN X R, et al. Doppler positioning method and experiment based on Starlink beacon signal[J]. Systems Engineering and Electronics, 2024, 46(8): 2535-2545 (in Chinese). | |
| [18] | 沈利荣, 李守兵, 孙海峰, 等. 基于Starlink机会信号/INS的组合导航方法[J]. 导航定位与授时, 2024, 11(2): 72-82. |
| SHEN L R, LI S B, SUN H F, et al. Integrated navigation method based on Starlink opportunity signal/INS[J]. Navigation Positioning and Timing, 2024, 11(2): 72-82 (in Chinese). | |
| [19] | KHALIFE J, NEINAVAIE M, KASSAS Z M. The first carrier phase tracking and positioning results with starlink LEO satellite signals[J]. IEEE Transactions on Aerospace and Electronic Systems, 2022, 58(2): 1487-1491. |
| [20] | NEINAVAIE M, KHALIFE J, KASSAS Z M. Acquisition, Doppler tracking, and positioning with starlink LEO satellites: First results[J]. IEEE Transactions on Aerospace and Electronic Systems, 2022, 58(3): 2606-2610. |
| [21] | 陈小莉, 朱溢涛, 郭文飞, 等. 基于卡尔曼滤波的铱星信号多普勒跟踪方法与参数设计[J]. 电讯技术, 2025, 65(5): 756-766. |
| CHEN X L, ZHU Y T, GUO W F, et al. Doppler tracking method and parameter design of Iridium signal based on Kalman filtering[J]. Telecommunication Engineering, 2025, 65(5): 756-766 (in Chinese). | |
| [22] | 张健, 李瑞田, 邓亮, 等. 面向多核CPU/众核GPU架构的非结构CFD共享内存并行计算技术[J]. 航空学报, 2024, 45(7): 128888. |
| ZHANG J, LI R T, DENG L, et al. Shared-memory parallelization technology of unstructured CFD solver for multi-core CPU/many-core GPU architecture[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(7): 128888 (in Chinese). | |
| [23] | 张东飞, 高军辉. GPU加速高阶谱差分方法在风扇噪声中的应用[J]. 航空学报, 2024, 45(8): 128941. |
| ZHANG D F, GAO J H. Application of GPU-accelerated high-order spectral difference method in fan noise[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(8): 128941 (in Chinese). | |
| [24] | 刘嫒荣, 熊永清, 惠建江, 等. SpaceX星链卫星发布星历的研究[J]. 天文学报, 2024, 65(6): 42-61. |
| LIU A R, XIONG Y Q, HUI J J, et al. Research on Starlink ephemeris published by SpaceX[J]. Acta Astronomica Sinica, 2024, 65(6): 42-61 (in Chinese). | |
| [25] | HUMPHREYS T E, IANNUCCI P A, KOMODROMOS Z M, et al. Signal structure of the starlink ku-band downlink[J]. IEEE Transactions on Aerospace and Electronic Systems, 2023, 59(5): 6016-6030. |
| [26] | WEI S. A new location method based on Internet satellite beacon signal[C]∥2024 7th International Conference on Information Communication and Signal Processing (ICICSP). Piscataway: IEEE Press, 2024: 8-12. |
| [27] | KHALIFE J, NEINAVAIE M, KASSAS Z M. Blind Doppler tracking from OFDM signals transmitted by broadband LEO satellites[C]∥2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring). Piscataway: IEEE Press, 2021: 1-5. |
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