Matched filter and correlation detection method

摘要

The present invention provides a matched filter and correlation detection method that carries out correlation detection on a time-division basis on a reception signal with known periodic codes inserted as in the case of a preamble search by a base station that carries out a CDMA communication. The mobile station multiplies 16 types of signature codes by a common scrambling code, generates a preamble signal and carries out transmission. The base station carries out despreading by multiplying the scrambling code and reproduces the signature codes. Then, the first cumulative addition section carries out a cumulative addition on a plurality of sets of data portions at a same position corresponding to the cycle of the signature codes and then the multiplication section multiplies signature codes. Finally, the second cumulative addition section adds up symbols and detects a correlation.