| 摘要 |
PROBLEM TO BE SOLVED: To correctly acquire synchronism fast even when there is an interference wave as to a radio system which transmits signals from different transmitters in the same timing at the same frequency and inserts a known pattern into the sent signals for synchronization. SOLUTION: This device is equipped with a 1st correlator 101 which correlates a received signal with the known pattern of a desired wave, a 2nd correlator 103 which correlates the known pattern of an interference wave with the received signal, and a synchronism deciding circuit 105 which decides synchronism according to the correlative values outputted from the 1st and 2nd correlators and decides that the output whose synchronism is detected first is synchronized. Then the patterns of both the desired wave and interference wave are correlated with each other and then the correlation is obtained with one of the desired wave and interference wave even if the other wave is affected by phasing, so that the time until the acquisition of synchronism can be shortened. |
