LTE backscatter system time synchronization optimization method, equipment and storage medium

By optimizing the time synchronization of the LTE backscatter system through dynamic threshold circuitry and parameter selection strategies, the problems of poor synchronization performance caused by signal strength variations and difficulty in parameter selection are solved, achieving wider applicability and higher synchronization accuracy.

CN120128454BActive Publication Date: 2025-11-14UNIV OF SCI & TECH OF CHINA
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Patent Information

Application Number
CN202510270725.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-07
Publication Date
2025-11-14
Estimated Expiration
2045-03-07

AI Technical Summary

Technical Problem

Existing time synchronization methods for LTE backscatter systems are ineffective when the synchronization signal strength changes, and lack effective parameter selection strategies, resulting in insufficient synchronization accuracy and reliability.

Method used

By employing a dynamic threshold circuit and parameter selection strategy, the time synchronization process of the discontinuous template matching method is improved by dynamically adjusting the threshold voltage and optimizing system parameters, including the normalized threshold, dynamic correlation threshold, template length, and period coefficient.

Benefits of technology

It achieves high-precision time synchronization under different signal strength conditions, improves the versatility and synchronization performance of the system, shortens the parameter selection time, and enhances the efficiency and reliability of synchronization.

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Abstract

This invention relates to the field of backscatter communication technology, and discloses a method, device, and storage medium for optimizing time synchronization in an LTE backscatter system. The method includes: a dynamic threshold circuit capturing the peak voltage of a synchronization signal and dividing the peak voltage to obtain a threshold voltage, causing the threshold voltage of a voltage comparator to change according to the strength of the synchronization signal. The parameter selection strategy includes: presetting a period coefficient; calculating the background correlation coefficient under different template lengths and normalized thresholds; determining the optimal template length based on the background correlation coefficient and synchronization error; determining the optimal normalized threshold based on the background correlation coefficient, synchronization error, and optimal template length; and using the dynamic correlation threshold used to determine the optimal normalized threshold as the optimal dynamic correlation threshold. This invention can generate a threshold voltage matching different signal strengths and can accurately select the most suitable system parameters according to different synchronization accuracy requirements.
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Citation Information

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