Anti-bit slide protective frame synchronization method
A frame synchronization and bit sliding technology, applied in synchronization devices, digital transmission systems, electrical components, etc., can solve problems such as frame synchronization tracking failure, avoid interruption of frame synchronization tracking process, improve adaptability, and stabilize frame synchronization tracking. Effect
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[0014] refer to figure 1 . According to the present invention, frame synchronization against bit slipping can be realized by the following steps:
[0015] 1) First, the demodulated data is delayed by 1 bit, 2 bits, 3 bits, 4 bits, 5 bits, and 6 bits through the data delay module, and then the original demodulated data and the delayed demodulated data are sent to 7 The frame synchronization word correlation module performs correlation calculation, and regards the corresponding path of the data delay module 3 as the main path; correlates the main path signal and the multi-channel lead and lag signals with the frame sync word, and obtains the correlation result of the multi-channel signal, Then adjust the next detection position according to the position where the relevant result exceeding the preset threshold appears;
[0016] 2) In the frame synchronization establishment stage, only the frame synchronization word correlation results of the main channel are detected, and when ...
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