一种基于有源动平台误差校正的BLUE多站信号相参合成方法
By modeling and estimating the measurement errors of the active calibration source and the receiving station using the least squares method, and combining the phase error estimation of the high-orbit satellite radiation source, the problem of estimating the position, time, and phase synchronization errors in the moving platform system was solved. This enabled efficient multi-station signal coherent synthesis, improving the accuracy and efficiency of the radar system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN INSTITUE OF SPACE RADIO TECH
- Filing Date
- 2023-08-22
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the estimation of position, time and phase synchronization errors of moving platform systems based on indirect estimation methods based on measurements has not been fully studied. In particular, it is difficult to achieve high-precision position, time and phase synchronization in open-loop moving platform distributed radar systems.
The location of the active correction source is designed, and the measurement error between the active moving platform and the receiving station is modeled. The relative position error and time synchronization error of the airborne radar are estimated using the least squares method, and the relative phase error is estimated by using a high-orbit satellite radiation source. Error correction is performed by mixing measurement information with the reverse signal envelope.
It achieves high-precision position, time, and phase synchronization under active motion platform conditions, improves the efficiency of coherent synthesis of multi-station signals, avoids the problem of excessive initial phase error deviation caused by joint error estimation, and has good prospects for engineering applications.
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Figure CN117310625B_ABST