METHOD AND DEVICE FOR SAMPLING CLOCK SYNCHRONIZATION

摘要

Disclosed is a sampling clock synchronization device, comprises: an A / D converter oversampling the received continuous signal to obtain oversampling sequence; an interpolation filter interpolates said oversampling sequence to obtain an oversampling sequence after a change in sampling frequency; a synchronous head extraction module to extract the synchronous head sequence from the oversampling sequence after a change in sampling frequency based on the signal frame structure and synchronous head location; a local synchronous sequence generator module generating local synchronous head sequence based on the signal frame structure; an early-late gate delays and down-samples said synchronous head sequence to obtain an early gate signal and a late gate signal, and correlate the local synchronous head sequence against the early gate signal and the late gate signal respectively, obtaining a sampling error based on the degree of symmetry of the correlation value;and a sample frequency offset adjustment module adjusting the current sample frequency offset based on the sampling error, obtaining the adjusted sample frequency offset and input into the A/D convertor or interpolation filter for sample frequency and phase synchronization. The present invention can quickly and accurately realize sampling clock synchronization.