Time synchronization method and system based on waveform matching

The invention provides a time synchronization method and system based on waveform matching. According to the method and system, based on the correlation principle, accurate time information is synchronized for a set of data not containing time scales or containing wrong time scales by utilizing a set of data containing reference time. The method comprises the steps that firstly, the data to be matched are segmented, correlation solution is performed on all segments and different sub-segments of reference data, when the correlation coefficient is maximum, the time difference between the segment of data and the reference data is calculated, and therefore time difference sequences of all the segments are obtained; secondly, the time difference sequences serve as observed values, time differences and time-scale drift factors serve as parameters to be estimated, and least square adjustment is performed to figure out the parameters to be estimated; finally, accurate time is synchronized for the data to be matched through the time differences and the time-scale drift factors. The time synchronization method and system can be widely applied to time synchronization during multi-sensor data fusion and can be further applied to correctness detection for time synchronization based on other methods.