Time synchronization method and device
A technology of time synchronization and time weighted average, applied in the direction of synchronization devices, electrical components, transmission systems, etc., can solve problems such as inaccurate symbol timing results and judging the starting position of OFDM symbols, so as to avoid the peak search process and reduce the amount of calculation , quickly determine the effect
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[0028] For correct demodulation, the starting position of the symbol must be found at the receiving end, therefore, timing estimation must be performed. If the timing is not correct, it may cause serious intersymbol interference. Since the frequency offset estimation is performed after the timing estimation, if the timing estimation is inaccurate, the estimation performance of the frequency offset will also be affected, resulting in the performance degradation of the entire OFDM system. Therefore, fast and accurate timing synchronization must be performed on the received data in a short time, that is, to determine the starting position of the OFDM symbol. Since the peak search process may fall on a local peak and the amount of calculation is large, this invention proposes a method for realizing time synchronization. When determining the timing position, the local sequence is shifted, and then the cross-correlation operation is performed with the received data, and finally the ...
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