射频水印系统中的同步算法

摘要

Watermarking synchronization in radio frequency（RF） watermarking system is a technical difficulty.Lacking the ability of frame synchronization recognition,present watermarking synchronization algorithms is inefficiency.In this paper,a method of frame-sync recognition using the technology of watermarking image definition evaluation is proposed.This method uses the corresponding relation between the max value of watermarking image definition evaluation function and frame-sync,establishes independent frame-sync process to slove the problem which needs searching bit by bit in the old watermarking synchronization algorithms,and shortens the time of watermarking synchronization efficiently.The simulation experiments proves the conclusion.%射频水印系统中的水印同步是一个技术难点,当前的水印同步算法因为缺乏帧同步位识别能力而效率较低。提出了一种利用水印图像清晰度评价技术识别帧同步位的方法。该方法通过水印图像清晰度评价函数最大值与帧同步位的对应关系,建立了独立的帧同步过程,解决了原水印同步算法需要逐位搜索的难题,能够有效缩短水印同步时间。通过仿真实验验证了这一结论。