| 摘要 |
PROBLEM TO BE SOLVED: To provide a synchronization method for an OFDM ( orthogonal frequency division multiplexing) based communication system with which reliability of frequency offset estimation can be improved by inserting a known fixed guard interval to each OFDM symbol. SOLUTION: In the synchronization method in the OFDM based communication system, a transmitting side generates and transmits an OFDM symbol having a constant cyclic prefix, independently of time domain data symbols that are to be transmitted. A receiving side estimates a time synchronization error on the basis of the known cyclic prefix. Since the time synchronization error is estimated on the basis of the constant cyclic prefix, which is always known, a highly reliable correlation is achieved, thereby improving the accuracy of synchronization. COPYRIGHT: (C)2005,JPO&NCIPI
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