Matched filter and correlation detection method
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United States of America Patent
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Jan 10, 2006
Grant Date -
May 9, 2002
app pub date -
Nov 1, 2001
filing date -
Nov 9, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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