一种激光终端通信光轴自适应寻优与跟踪方法
By combining high correlation delay compensation and energy gradient optimization, the problem of poor tracking accuracy of the SPGD algorithm under satellite platform vibration environment is solved, realizing high-precision optical axis tracking and fast optical axis optimization, ensuring the stability and high signal-to-noise ratio of laser communication, and reducing the communication bit error rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN INSTITUE OF SPACE RADIO TECH
- Filing Date
- 2023-11-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing PD coherent tracking methods based on the stochastic parallel gradient descent (SPGD) algorithm have poor tracking accuracy under satellite platform vibration environments and are limited by the bandwidth of the servo mechanism, resulting in low system tracking accuracy and additional disturbances caused by the servo mechanism.
An adaptive optimization and tracking method combining high correlation delay compensation (HCD) and energy gradient optimization (EGO) is adopted. The response delay is obtained by system frequency sweep, the delay time parameter is calculated, the follower momentum is optimized, and the follower mechanism is controlled to perform optical axis optimization and tracking, so as to achieve high-precision tracking and fast optical axis optimization.
It effectively suppressed the impact of satellite platform vibration, achieved high-precision optical axis tracking, ensured the stability and high signal-to-noise ratio of laser communication, and reduced the communication error rate.
Smart Images
Figure CN117675025B_ABST