Precision location approach in deep-space optical communications.

Area of Science:

• Optical Communications
• Deep Space Exploration
• Image Processing

Background:

• Traditional beacon location methods require high laser power for deep space optical communications.
• Natural celestial bodies offer a viable alternative for beacon imaging in long-distance links.
• Precise beacon location is essential for establishing and maintaining optical communication links.

Purpose of the Study:

• To propose and validate a new approach for determining the location of natural celestial beacons.
• To address the challenges of beacon identification in uncertain deep space environments.
• To enhance the reliability of deep space optical communication systems.

Main Methods:

• Phase correlation is employed to identify beacons in uncertain regions by comparing detected and reference images.
• Fourier transform eliminates image translation effects.
• Log-polar transformation and phase correlation are used to convert and solve scaling and rotation issues.

Main Results:

• The proposed approach successfully determines natural celestial beacon locations.
• Experimental verification confirms the availability and effectiveness of the new method.
• The algorithm achieves a success probability exceeding 96%, even when considering image noise.

Conclusions:

• The developed method provides a robust solution for natural celestial beacon location in deep space optical communications.
• Implementation on a field-programmable gate array (FPGA) system demonstrates practical feasibility.
• This work contributes significantly to the design and advancement of deep space optical communication systems.