Research on simultaneous tracking technology using a single detector for two nodes in space laser communication...

Area of Science:

• Optical engineering
• Space communication systems
• Signal processing

Background:

• Space laser communication is crucial for high-rate data transmission but faces challenges in multi-node tracking.
• Conventional systems use multiple detectors, increasing cost and complexity.
• The space environment poses significant hurdles for reliable communication.

Purpose of the Study:

• To develop a novel approach for simultaneous tracking of multiple nodes in space laser communication using a single detector.
• To reduce the cost and complexity of space laser communication systems.
• To enhance the reliability and precision of tracking in dynamic space environments.

Main Methods:

• Implementation of code division multiple access (CDMA) for multi-signal detection.
• Development of real-time signal processing algorithms for simultaneous tracking.
• Experimental validation using a single-detector system.

Main Results:

• Achieved tracking accuracies of 9.8 µrad and 9.5 µrad (azimuth) and 23.1 µrad and 29.3 µrad (elevation) for two distinct nodes.
• Successfully maintained stable communication links between nodes.
• Demonstrated high tracking precision and reliable system performance.

Conclusions:

• A single-detector system enabled by CDMA and advanced signal processing can achieve simultaneous multi-node tracking.
• This approach significantly reduces system complexity and cost for space laser communication.
• The demonstrated technology offers a promising solution for future high-rate, multi-node space optical networks.