Frame synchronization method and device for broadband power line communication

Through the combination of symbolic cross-correlation and autocorrelation accumulated value sequences, the validity of candidate peaks is determined dynamically, and the synchronization accuracy reduction caused by multipath effect and noise interference in broadband power line communication systems is solved, and high-precision and high-reliability frame synchronization is achieved.

CN120238410AActive Publication Date: 2025-07-01SUZHOU GATE-SEA MICROELECTRONICS TECH CO LTD
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Patent Information

Application Number
CN202510710617.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-29
Publication Date
2025-07-01
Estimated Expiration
2045-05-29

AI Technical Summary

Technical Problem

In a broadband power line communication system, the frame synchronization method causes the energy dispersion of the synchronization peak and the synchronization accuracy to decrease due to multipath effect and noise interference. It is difficult for the prior art to accurately distinguish effective signals from noise, and synchronization offsets or misjudgment are prone to occur.

Method used

The cross-correlation sequence is generated through symbolic cross-correlation calculation, combined with the autocorrelation accumulated value sequence, the candidate peak position is dynamically determined, and the validity of the candidate peak is determined by comparing the autocorrelation accumulated value of the synchronous peak window and the noise evaluation window, and finally the target synchronization peak is determined through multi-peak position average calculation.

Benefits of technology

It significantly improves the synchronization accuracy, anti-interference ability and reliability of the broadband power line communication system in multipath effect and noise environments, reduces the computational complexity, and improves the synchronization positioning accuracy and the fault tolerance of the system.

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Abstract

The invention relates to the technical field of power line communication, and discloses a frame synchronization method and device for broadband power line communication, and the method comprises the steps: carrying out the symbolization cross-correlation operation of a received signal, and obtaining a cross-correlation result sequence; performing secondary autocorrelation analysis and accumulation processing on the cross-correlation values in the sequence to generate an autocorrelation accumulated value sequence; screening candidate peak positions according to absolute values of the self-correlation accumulated values; defining a synchronous peak analysis window around the candidate peak position, and setting a noise reference window in an area far away from the window; verifying the validity of the candidate peak based on the difference between the autocorrelation accumulated values of the synchronization peak window and the noise reference window; and if the verification is valid, calculating and determining a final synchronization position through a mean value of a plurality of peak value positions in the synchronization peak window. According to the method, the problem of inaccurate synchronization peak positioning under the multipath effect and noise interference in the existing method is solved through the self-correlation accumulation and noise separation mechanism, and the reliability of frame synchronization is improved.
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