| 摘要: |
| 以高超声速平台信号级协同为应用背景，针对传统数据链往返计时（Round Trip Time，RTT）方法应用于高超声速平台时相对运动造成的时间同步误差以及平台间时钟带来的频差问题，提出了一种高超声速平台高精度时频同步方案。该方案采用惯导数据分发的方式补偿高超声速运动带来的RTT时间同步误差，并通过自适应无迹卡尔曼滤波算法准确估计高超声速平台间的时钟频差。建立了基于平台运动构型和误差特性的高超声速平台时频同步数学模型，并进一步搭建了高超声速平台时频同步半实物仿真验证系统。数学仿真和半实物仿真结果表明，采用该方法在两高超声速平台间的时间同步精度可达5 ns，频差准确度可达到1×10-9。 |
| 关键词: 高超声速平台 数据链RTT算法 时频同步 误差分析与补偿 自适应无迹卡尔曼滤波 |
| DOI：10.20079/j.issn.1001-893x.250410005 |
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| 基金项目: |
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| A Time-Frequency Synchronization Method for Hypersonic Platforms on Data Link |
| YE Jun,LI Shu,XU Ziyi,KANG Ronglei,ZHANG Haitao,CHANG Jun |
| (Southwest China Institute of Electronic Technology，Chengdu 610036，China) |
| Abstract: |
| Focusing on signal-level collaboration for hypersonic platforms，the traditional data link round trip time(RTT) method faces challenges due to time synchronization errors caused by high-speed relative motion between platforms，as well as frequency differences stemming from clocks between platforms.To address these issues，a high-precision time-frequency synchronization scheme for hypersonic platforms is proposed.This scheme leverages inertial navigation data distribution to compensate for RTT time synchronization errors resulting from hypersonic motion.Simultaneously，an adaptive unscented Kalman filtering algorithm is employed to accurately estimate the clock frequency differences between platforms.For validation，a mathematical model for time-frequency synchronization of hypersonic platforms is established based on their motion configurations and error characteristics.A hardware-in-the-loop simulation system is further developed to verify the scheme.Both mathematical and semi-physical simulations demonstrate that the proposed scheme achieves a time synchronization accuracy of 5 ns and a frequency difference accuracy of 1×10-9 between hypersonic platforms in relative motion. |
| Key words: hypersonic platform data link RTT algorithm time-frequency synchronization error analysis and compensation adaptive unscented Kalman filtering |
《电讯技术》编辑部 