Research on simultaneous tracking technology using a single detector for two nodes in space laser communication
Abstract:
Space laser communication technology, a key enabler for future high-rate data transmission, faces significant challenges due to the complex space environment and the requirement for dynamic multi-node tracking. Conventional laser communication systems typically rely on multiple detectors to acquire signals from multiple communication nodes, thereby increasing system cost and complexity. This study overcomes this limitation by demonstrating simultaneous tracking of two distinct communication nodes using a single detector, enabled by code division multiple access (CDMA) multi-signal detection and real-time signal processing algorithms. Experimental results show tracking accuracies of 9.8 µrad and 9.5 µrad along the azimuth axis, and 23.1 µrad and 29.3 µrad along the elevation axis, for the two nodes, respectively. The system successfully maintained stable communication links, demonstrating high tracking precision and reliable system performance.
