Abstract

In order to solve the problem of synchronization error caused by the inaccurate sampling points of two signals in high-speed AD sampling, a new method is proposed based on digital phase discrimination. Firstly, the influence of AD synchronization error on digital phase discrimination is analyzed, and the relationship between AD synchronization error and the phase difference of two signals obtained by phase discrimination is deduced. Then, according to the relationship, a method of synchronization error estimation is given by using single frequency point or two frequency points algorithm, and the conditions that the synchronization error and frequency point selection should meet are given.

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