A terminal time delay compensation method for low-orbit internet satellite communication

By employing a dual-processor collaborative architecture to perform high-precision extrapolation and interpolation calculations of satellite orbit and terminal position, the problem of time delay compensation caused by high-speed terminal movement in low-Earth orbit internet satellite communication is solved. This achieves high-precision real-time time delay compensation for the terminal, ensuring that the uplink signal is within the cyclic prefix protection interval and avoiding demodulation failure.

CN122137457APending Publication Date: 2026-06-02THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
Filing Date
2026-05-06
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In low-Earth orbit internet satellite communication, the contradiction between the time-varying characteristics of the TA value caused by the high-speed movement of the terminal and the limited computing resources may cause the uplink signal to slip out of the cyclic prefix guard interval, resulting in demodulation failure.

Method used

A dual-processor asynchronous collaborative architecture is adopted, which uses the high-performance first processor to perform high-dimensional extrapolation calculations of satellite orbit and terminal position, and combines lightweight interpolation operations to achieve time delay compensation between the terminal and the satellite.

Benefits of technology

It achieves high-precision real-time delay compensation for terminals under high-speed motion conditions, resolves the contradiction between resource constraints and high-frequency delay compensation calculation, ensures that the uplink signal is within the cyclic prefix protection interval, and avoids demodulation failure.

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Abstract

The application provides a terminal time delay compensation method for low-orbit Internet satellite communication and belongs to the technical field of satellite communication. Through a double-processor asynchronous cooperation architecture, a first processor with rich computing power resources is used to perform high-dimensional satellite orbit extrapolation, terminal trajectory prediction and initial compensation amount calculation; a second processor is used to obtain fine-grained time delay parameters through light-weight interpolation and accurately control the transmission time of uplink data. The scheme realizes high-precision real-time compensation of transmission time delay under the condition of high-speed movement of the terminal, and effectively solves the contradiction between limited terminal resources and high-frequency time delay compensation amount calculation.
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