Vehicle-to-Everything (V2X) Symbol Synchronization Method, Device and Storage Medium

By performing coarse and fine synchronization processing on the baseband vehicle network signal and the local synchronization signal, calculating the frequency offset estimate and compensating for it, the problem of poor reliability and accuracy of traditional algorithms in LTE-V2X communication scenarios with high frequency offset and low signal-to-noise ratio is solved, and higher synchronization accuracy and reliability are achieved.

CN116232835BActive Publication Date: 2026-05-26CHINA UNITED NETWORK COMM GRP CO LTD
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Patent Information

Application Number
CN202310261844.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-16
Publication Date
2026-05-26
Estimated Expiration
2043-03-16

AI Technical Summary

Technical Problem

Traditional symbol synchronization algorithms have poor reliability and accuracy in real-world LTE-V2X communication scenarios with high frequency bias and low signal-to-noise ratio.

Method used

A two-stage synchronization process is employed, including coarse synchronization and fine synchronization. By processing the baseband vehicle network signal and the local synchronization signal, the frequency offset estimate is calculated and compensated to improve the synchronization accuracy.

Benefits of technology

It improves the reliability and accuracy of symbol synchronization, adapts to the characteristics of high frequency bias and low signal-to-noise ratio in LTE-V2X, and enhances the reliability and accuracy in actual LTE-V2X communication scenarios with high frequency bias and low signal-to-noise ratio.

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Abstract

This application provides a method, apparatus, and storage medium for vehicle-to-everything (V2X) symbol synchronization, relating to the field of communication technology. It addresses the problem of poor reliability and accuracy of traditional symbol synchronization algorithms in high-frequency bias and low signal-to-noise ratio (SNR) LTE-V2X practical communication scenarios. The method includes: performing coarse synchronization processing on the received baseband V2X signal and local synchronization signal to obtain a coarse synchronization point; calculating a frequency offset estimate based on the local synchronization signal and the coarsely synchronized baseband V2X signal, and using the frequency offset estimate to compensate the local synchronization signal; based on the coarse synchronization point, extracting the unsampled baseband V2X signal from the received baseband V2X signal; and performing fine synchronization processing on the unsampled baseband V2X signal and the frequency offset-compensated local synchronization signal to obtain a fine synchronization point. The embodiments of this application are used in the process of V2X symbol synchronization.
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