Wavefront phase recovery method, atmospheric channel estimation method and device for atmospheric laser communication system

By combining multi-angle measurement and non-convex optimization gradient descent algorithm, wavefront phase information in atmospheric laser communication is recovered, solving the local minima problem and improving phase recovery accuracy and signal receiving power.

CN121396324BActive Publication Date: 2026-07-03BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Filing Date
2025-09-25
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In atmospheric laser communication, existing gradient descent-based non-convex optimization algorithms are prone to getting trapped in local minima during wavefront phase recovery, resulting in low phase recovery accuracy.

Method used

By acquiring multiple sets of deflection measurement amplitude data, iterative operations are performed using a non-convex initialization prediction algorithm and a gradient descent non-convex optimization algorithm. Combined with multi-angle measurement and reverse deflection, the wavefront phase information of the target distorted beam is recovered, avoiding local minima traps.

Benefits of technology

It improves the accuracy of wavefront phase recovery, bringing it closer to the global optimum, and enhances the signal receiving power and system performance of atmospheric laser communication.

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Abstract

This invention provides a wavefront phase recovery method, an atmospheric channel estimation method, and an apparatus for atmospheric laser communication systems. The method includes: acquiring multiple sets of deflection measurement amplitude data corresponding to a target distorted beam; obtaining a first complex amplitude corresponding to each set of deflection measurement amplitude data based on a non-convex initialization prediction algorithm; iteratively operating on each set of first complex amplitudes using a gradient descent-based non-convex optimization algorithm to obtain a reconstructed complex amplitude that meets the target recovery conditions; and determining the wavefront phase information of the target distorted beam based on the reconstructed complex amplitude. This invention can obtain the globally optimal wavefront phase information when using a gradient descent-based non-convex optimization algorithm for wavefront phase recovery, thereby improving the accuracy of phase recovery.
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