| 摘要 |
One code is generated by combining (including addition) 2 or more codes, correlation detection method which detects the correlation by multiplying such a generated code by the reception data. In communication system based on W-CDMA method, first spreading code (a.Cp) obtained by multiplying primary synchronization code with a predetermined coefficient and second spreading code (a.Cs) obtained by multiplying secondary synchronization code with a predetermined coefficient are added. Then, the third spreading code (a.Cp+a.Cs) obtained from such an addition is multiplied by the reception data, and correlation value is obtained after integrating the multiplication results. Thus, it is determined whether the reception data has been subjected to STTD diversity.
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